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XRAY - Master X-Ray Catalog |
HEASARC Archive |
* XRBCAT - X-Ray Binaries Catalog * HMXBCAT - High-Mass X-Ray Binaries Catalog * MAGHMXBCAT - Magellanic Clouds High-Mass X-Ray Binaries Catalog * LMXBCAT - Low-Mass X-Ray Binaries Catalog * ULXRBCAT - Ultraluminous X-Ray Sources in External Galaxies Catalog * BAXGALCLUS - BAX X-Ray Galaxy Clusters and Groups Catalog * A2PIC - HEAO 1 A2 Piccinotti Catalog * A4 - HEAO 1 A4 Catalog of High-Energy X-Ray Sources * EMSS - Einstein Extended Medium Sensitivity Survey * HRICFA - Einstein High Resolution Imager (HRI) Source List * HRIDEEP - Einstein HRI Deep Survey Source Positions * IPC - Einstein Imaging Proportional Counter (IPC) Source List * IPCDEEP - Einstein IPC Deep Survey Source Positions * IPCOSTARS - Einstein IPC Measures of Count Rates for O Stars * IPCSLEW - Einstein IPC Slew Survey Catalog * LMCXRAY - Einstein IPC Discrete X-Ray Sources in the Direction of the LMC * SMCXRAY - Einstein IPC Discrete X-Ray Sources in the Direction of the SMC * IPCULTSOFT - Einstein IPC Ultrasoft Sources Catalog * EXSS - Einstein Extended Source Survey * EINSTEIN2E - Einstein 2E Catalog of IPC X-Ray Sources * EINOPSLGAL - Einstein Survey of Optically Selected Galaxies * EINGALCAT - Einstein Observatory Galaxies Catalog * EINGALCLUS - Einstein Observatory Clusters of Galaxies Catalog * CMA - EXOSAT Channel Multiplier Array (CMA) `Good' Source List * EXOHGLS - EXOSAT CMA High Galactic Latitude Survey * RASSBSC - ROSAT All-Sky Survey Bright Source Catalog * WGACAT - ROSAT PSPC White, Giommi, and Angelini `Good' Source Catalog * RBS - ROSAT Bright Survey (Schwope et al. 2000) * LMCHRIXRAY - ROSAT HRI Catalog of LMC X-Ray Sources (Sasaki et al.) * SMCROSXRY2 - ROSAT PSPC Catalog of SMC X-Ray Sources (Haberl et al.) * ROSPSPC - ROSAT Results Archive Sources for the PSPC (good sample) * RASSHGSOFT - ROSAT All-Sky Survey: Soft High Galactic-Latitude X-Ray Sources * RASSFSC - ROSAT All-Sky Survey Faint Source Catalog * CHASFRXRAY - ROSAT All-Sky Survey: Chamaeleon Star Forming Region Study * LMCROSXRAY - ROSAT PSPC Catalog of LMC X-Ray Sources (Haberl & Pietsch) * SMCROSXRAY - ROSAT PSPC Survey of the Small Magellanic Cloud * RASSCNS3 - ROSAT All-Sky Survey: Nearby Stars * ROSHRI - ROSAT Results Archive Sources for the HRI (good sample) * ORIONXRAY - ROSAT Survey of the Orion Nebula * RASSWD - ROSAT All-Sky Survey: White Dwarves * RASSOB - ROSAT All-Sky Survey: OB Stars * M31ROSXRAY - ROSAT PSPC M31 Source Catalog * RASSDWARF - ROSAT All-Sky Survey: A-K Dwarfs/Subgiants * ROSATRLQ - ROSAT Radio-Loud Quasars Catalog * ROSATRQQ - ROSAT Radio-Quiet Quasars Catalog * RASSGIANT - ROSAT All-Sky Survey: Giants & Supergiants * DXRBS - ROSAT Deep X-Ray Radio Blazar Survey * PLEIADXRAY - ROSAT PSPC Catalog of the Pleiades (Micela et al. 1996) * BMWHRICAT - Brera Multi-scale Wavelet (BMW) ROSAT HRI Source Catalog * REFLEX - ROSAT-ESO Flux-Limited X-Ray (REFLEX) Galaxy Cluster Survey * RASSNORSAM - ROSAT All-Sky Survey Completely Identified Northern Sample Catalog * HRASSCAT - Hamburg/ROSAT All-Sky Survey X-Ray Source Catalog * RIXOS - ROSAT International X-Ray/Optical Survey Source Catalog * NORAS - Northern ROSAT All-Sky (NORAS) Galaxy Cluster Survey Catalog * RASSDSSAGN - ROSAT All-Sky Survey and SDSS Sample of X-Ray Emitting AGN * RASSEBCS - ROSAT All-Sky Survey Extended Brightest Cluster Sample * ROSGALCLUS - ROSAT PSPC Catalog of Clusters of Galaxies * RBSCNVSS - ROSAT All-Sky Survey/NVSS Bright X-Ray Source Sample * ROSNEPAGN - ROSAT North Ecliptic Pole Survey Active Galactic Nuclei Catalog * ROSNEPXRAY - ROSAT North Ecliptic Pole Survey X-Ray Source Catalog * BHRFSCID - Byurakan/Hamburg/ROSAT Catalog of Optical IDs * ROXA - ROXA (Radio-Optical-X-ray at ASDC) Blazars Catalog (Turriziani et al.) * ROS400GCLS - ROSAT PSPC 400 Square Degree Galaxy Cluster Catalog (Burenin et al.) * RASSDSSTAR - ROSAT All-Sky Survey and SDSS Sample of X-Ray Emitting Stars (Agueros et al.) * ASCAGIS - ASCA Gas Imaging Spectrometer (GIS) Source Catalog * ASCASIS - ASCA Solid-State Imaging Spectrometer (SIS) Source Catalog * TARTARUS - Reduced ASCA AGN Data (Version 3.1) * ASCAGPS - ASCA Galactic Plane Survey of Faint X-Ray Sources * ASCALSS - ASCA Large Sky Survey * SAX2TO10 - BeppoSAX 2-10 keV Survey (Giommi, et al.) * SAXWFCCAT - BeppoSAX Wide Field Camera X-Ray Source Catalog (Verrecchia et al.) * CHANDFN2MS - Chandra Deep Field North 2-Megasecond Catalog (Alexander et al.) * CHANDFS1MS - Chandra Deep Field South 1-Megasecond Catalog (Giacconi et al.) * CHANDFS2MS - Chandra Deep Field South 2-Megasecond Catalog (Luo et al.) * CHANSEXSI - Chandra Serendipitous Extragalactic X-Ray Source ID Catalog (Harrison et al.) * CLASXS - Chandra Large-Area Synoptic X-Ray Survey of Lockman Hole-NW (Yang et al.) * M31CXOXRAY - M31 Central Region Chandra X-Ray Point Source Catalog (Kong et al.) * M33CXOXRAY - M33 Chandra X-Ray Point Source Catalog (Grimm et al.) * CHANEXTDFS - Chandra Extended Deep Field South Pt Source Catalog (Lehmer et al.) * XBOOTES - An X-Ray Survey of the NDWFS Bootes Field (Kenter et al.) * COUP - Chandra Orion Ultradeep Point Source Catalog (Getman et al.) * CHPNGPTSRC - Chandra Nearby Galaxies Point Source Catalog (Colbert et al.) * CHAMPPSC - Chandra Multiwavelength Project (ChaMP) Point Source Catalog (Kim et al.) * CHANNSGPSC - Chandra Nearby Spiral Galaxies Point Source Catalog (Kilgard et al.) * CHANTYPGPR - Chandra Typical Galactic Plane Region Point Source Catalog (Ebisawa et al.) * NGC2024CXO - NGC 2024 Chandra X-Ray Point Source Catalog (Skinner et al.) * NGC2244CXO - NGC 2244/Rosette Nebula Chandra X-Ray Point Source Catalog (Wang et al.) * NGC2264CXO - NGC 2264 Chandra X-Ray Point Source Catalog (Ramirez et al.) * NGC2264CX2 - NGC 2264 Chandra X-Ray Point Source Catalog 2 (Flaccomio et al.) * NGC2516CXO - NGC 2516 Chandra X-Ray Point Source Catalog (Damiani et al.) * NGC2808CXO - NGC 2808 Chandra X-Ray Point Source Catalog (Servillat et al.) * NGC6530CXO - NGC 6530 Chandra X-Ray Point Source Catalog (Damiani et al.) * IC1396NCXO - IC 1396N Chandra X-Ray Point Source Catalog (Getman et al.) * IC348CXO - IC 348 Chandra X-Ray Point Source Catalog (Preibisch, Zinnecker) * TRIFIDCXO - Trifid Nebula (M 20) Chandra X-Ray Point Source Catalog (Rho et al.) * MONR2CXO - Monoceros R2 Cloud Chandra X-Ray Point Source Catalog (Nakajima et al.) * M67CXO - M 67 Chandra X-Ray Point Source Catalog (van den Berg et al.) * OMC2P3CXO - OMC-2 and OMC-3 Chandra X-Ray Point Source Catalog (Tsujimoto et al.) * CEPBOB3CXO - Cep B/OB3 Star-Forming Region Chandra X-Ray Point Source Catalog (Getman et al.) * CYGTEVCXO - Cygnus TeV Source Chandra X-Ray Point Source Catalog (Butt et al.) * CHAINTHCXO - Chamaeleon I North Cloud Chandra X-Ray Point Source Catalog (Feigelson, Lawson) * LMC30DRCXO - LMC 30 Doradus Complex Chandra X-Ray Point Source Catalog (Townsley et al.) * RCW38CXO - RCW 38 Chandra X-Ray Point Source Catalog (Wolk et al.) * RHOOPHCXO - Rho Ophiuchi SFR Chandra X-Ray Point Source Catalog (Imanishi et al.) * CENACXO - Centaurus A Galaxy Chandra X-Ray Point Source Catalog (Kraft et al.) * ELAISCXO - ELAIS N1 and N2 Fields Chandra X-Ray Point Source Catalog (Manners et al.) * NGC2362CXO - NGC 2362 Chandra X-Ray Point Source Catalog (Damiani et al.) * NGC1333CXO - NGC 1333 Chandra X-Ray Point Source Catalog (Getman et al.) * ORIONFFCXO - Orion Flanking Fields Chandra X-Ray Point Source Catalog (Ramirez et al.) * CHANULXCAT - Chandra Archive Of Galaxies Ultraluminous X-Ray Source Catalog (Swartz et al.) * ONCCXOXRAY - Orion Nebula Cluster Chandra HRC X-Ray Point Source Catalog (Flaccomio et al.) * M81CXO - M 81 Chandra X-Ray Discrete Source Catalog (Swartz et al.) * M87CXO - M 87 Chandra X-Ray Point Source Catalog (Jordan et al.) * CYDER - Calan-Yale Deep Extragalactic Research Survey X-Ray Source Catalog (Treister et al.) * LALABOOCXO - LALA Bootes Field Chandra X-Ray Point Source Catalog (Wang et al.) * CHAMPHXAGN - CHAMP (Chandra Multiwavelength Project) Hard X-Ray Emitting AGN (Silverman et al.) * M51CXO - M 51 Chandra X-Ray Discrete Source Catalog (Terashima, Wilson) * SWIRECXO - Spitzer Wide-Area IR Extra-Galactic Survey Chandra X-Ray Sources (Franceschini et al.) * NGC4649CXO - NGC 4649 Chandra X-Ray Discrete Source Catalog (Randall et al.) * SPICESCXO - SPICES Lynx Field Chandra X-Ray Source Catalog (Stern et al.) * NGC4472CXO - NGC 4472 Chandra X-Ray Point Source Catalog (Maccarone et al.) * GC47TUCCXO - 47 Tuc Globular Cluster Chandra X-Ray Point Source Catalog (Heinke et al.) * ARCQUINCXO - Arches and Quintuplet Clusters Chandra X-Ray Point Source Catalog (Wang et al.) * M101CXO - M 101 Chandra X-Ray Point Source Catalog (Pence et al.) * M17CXO - M 17 Chandra X-Ray Point Source Catalog (Broos et al.) * GWSSTRPCXO - Groth-Westphal Strip Chandra X-Ray Point Source Catalog (Nandra et al.; Georgakakis et al.) * CDFSAGNCXO - Chandra Deep Field South AGN Spectral Properties Catalog (Tozzi et al.) * RCW49CXO - RCW 49 Chandra X-Ray Point Source Catalog (Tsujimoto et al.) * NGC6357CXO - NGC 6357 Chandra X-Ray Point Source Catalog (Wang et al.) * M33CHASE - M 33 Chandra ACIS Survey (ChASeM33) Source Catalog (Plucinsky et al.) * CYGOB2CXO - Cygnus OB2 Association Chandra X-Ray Point Source Catalog (Albacete Colombo et al.) * WD1CXO - Westerlund 1 Chandra X-Ray Point Source Catalog (Clark et al.) * SMCWINGCXO - Small Magellanic Cloud Wing Survey Chandra X-Ray Point Source Catalog (McGowan et al.) * RCW108CXO - RCW 108 Star Formation Region Chandra X-Ray Point Source Catalog (Wolk et al.) * BMWCHANCAT - Brera Multi-scale Wavelet (BMW) Chandra Source Catalog * CHAMPLANE - Chandra Multiwavelength Plane Survey Optical ID Catalog (Koenig et al.) * NGC752CXO - NGC 752 Chandra X-Ray Point Source Catalog (Giardino et al.) * CLANS - Chandra Lockman Area North Survey (CLANS) X-ray Source Catalog (Trouille et al.) * CHESSCAT - ChaMP Extended Stellar Survey (ChESS) X-Ray Catalog (Covey et al.) * AEGISX - AEGIS-X Chandra Extended Groth Strip X-Ray Point Source Catalog (Laird et al.) * ETGALCXO - Early-Type Galaxies Chandra X-Ray Point Source Catalog (Humphrey, Buote) * CAIXA - Catalog of AGN in the XMM-Newton Archive (Bianchi et al.) * GALCENCXO - Galactic Center Chandra X-Ray Point Source Catalog (Muno et al.) * HPERSEICXO - h Persei Chandra X-Ray Point Source Catalog (Currie et al.) * SDSSCXOQSO - Sloan Digital Sky Survey Quasars Detected by Chandra (Green et al.) * ECDFSCXO - Extended Chandra Deep Field-South X-Ray Point Source Catalog (Virani et al.) * NGC4278CXO - NGC 4278 Chandra X-Ray Point Source Catalog (Brassington et al.) * XMMSSC - XMM-Newton Serendipitous Source Catalog (2XMM) * XMMGPS - XMM-Newton Galactic Plane Survey (XGPS) * M31XMMXRAY - XMM-Newton M31 Survey Catalog * M33XMMXRAY - XMM-Newton M33 Survey Catalog * M33XMM2 - M33 XMM-Newton X-Ray Variability Source Catalog (Misanovic et al.) * XMMCFRSCAT - XMM-Newton/Canada-France Redshift Survey Fields X-Ray Sources * XMDSVVDS4S - XMM-Newton Medium Deep Survey/VIRMOS VLT Deep Survey 4-Sigma Catalog (Chiappetti et al.) * XMMSLEWCLN - XMM-Newton Slew Survey Clean Source Catalog, v1.0 * XMMBSS - XMM-Newton Bright Serendipitous Survey (Della Ceca et al.) * NGC2547XMM - NGC 2547 XMM-Newton X-Ray Point Source Catalog (Jeffries et al.) * EROSXMM - Extremely Red Objects XMM-Newton Survey Catalog (Brusa et al.) * LUPUS3XMM - Lupus 3 SFR XMM-Newton X-Ray Point Source Catalog (Gondoin) * NGC2516XMM - NGC 2516 Cluster XMM-Newton X-Ray Point Source Catalog (Pillitteri et al.) * NGC2808XMM - NGC 2808 XMM-Newton X-Ray Point Source Catalog (Servillat et al.) * NGC6231XMM - NGC 6231 XMM-Newton X-Ray Source Catalog (Sana et al.) * NGC6530XMM - NGC 6530 XMM-Newton X-Ray Point Source Catalog (Rauw et al.) * UPPRSCOXMM - Upper Sco XMM-Newton X-Ray Point Source Catalog (Argiroffi et al.) * SIGORIXMM - Sigma Orionis Cluster XMM-Newton X-Ray Point Source Catalog (Franciosini et al.) * NGC2516XMM - NGC 2516 Cluster XMM-Newton X-Ray Point Source Catalog (Pillitteri et al.) * OMEGCENXMM - Omega Centauri XMM-Newton X-Ray Point Source Catalog (Gendre et al.) * MARANOXMM - Marano Field XMM-Newton X-Ray Source Optical Counterparts Catalog (Krumpe et al.) * CEPAXMM - Cepheus A SFR XMM-Newton X-Ray Point Source Catalog (Pravdo, Tsuboi) * LOCKMANXMM - Lockman Hole Field XMM-Newton X-Ray Point Source Catalog (Mateos et al.) * LOCKMANXM2 - Lockman Hole XMM-Newton X-Ray Point Source Catalog (Brunner et al.) * AGNSDSSXMM - SDSS/XMM-Newton AGN Spectral Properties Catalog (Akylas et al.) * TAURUSXMM - Taurus Molecular Cloud XMM-Newton X-Ray Source Catalog (Guedel et al.) * AXIS - AXIS XMM-Newton Source Catalog (Carrera et al.) * ROS13HRXMM - ROSAT 13-hour Field XMM-Newton X-Ray Source Catalog (Loaring et al.) * SA57XMM - Selected Area 57 XMM-Newton X-Ray Source Catalog (Trevese et al.) * NGC2264XMM - NGC 2265 XMM-Newton X-Ray Point Source Catalog (Dahm et al.) * XMMLSS - XMM-Newton Large-Scale Structure X-Ray Source Catalog (Pierre et al.) * XMS - XMM-Newton Medium Sensitivity Survey (XMS) Source Catalog (Barcons et al.) * CARINAXMM - Carina OB1 Association XMM-Newton X-Ray Point Source Catalog (Antokhin et al.) * ELAISS1XMM - ELAIS S1 Field XMM-Newton X-Ray Source Catalog (Puccetti et al.) * SXDSCAT - Subaru/XMM-Newton Deep Survey X-Ray Source List (Ueda et al.) * NGC752XMM - NGC 752 XMM-Newton X-Ray Point Source Catalog (Giardino et al.) * NGC253XMM - NGC 253 XMM-Newton X-Ray Point Source Catalog (Barnard et al.) * XMMCOSMOS - XMM-Newton COSMOS X-Ray Point Source Catalog (Cappelluti et al.) * XTEASSCAT - RXTE All-Sky Slew Survey Catalog (XSS)
(2) Some X-ray detectors have some sensitivity to ultraviolet light as well as to X-rays, i.e., they have what is called a UV light leak. Particular instruments which are known to have had this feature include the Einstein High Resolution Instrument (HRI), the EXOSAT Low-Energy Telescope Channel Multiplier Array (LET CMA), and the ROSAT HRI. Some objects rich in UV emission, such as stars of spectral types O, B, and A, may thus be listed in source catalogs obtained using these instruments, even though they were detected due to their UV emission rather than any intrinsic X-ray emission. For further information on the Einstein HRI UV leak, see Appendix B of Schmitt et al. (1985, ApJ, 290,307), and on the ROSAT HRI UV leak, see Barbera et al. (2000, ApJ, 545, 449). To estimate the EXOSAT LE UV leak, you can use the FTOOLS utility exoleuv (see http://heasarc.gsfc.nasa.gov/lheasoft/ftools/exosat.html for more information on this task).
Name
The commonly-used name of the X-ray source, where available. Sometimes,
this parameter has been filled through cross-correlations with other HEASARC
databases.
Database_Table
The name of the HEASARC database table from which the entry was taken.
RA
The Right Ascension of the X-ray source.
Dec
The Declination of the X-ray source.
LII
The Galactic Longitude of the X-ray source.
BII
The Galactic Latitude of the X-ray source.
Count_Rate
The count rate associated with the X-ray source in counts per
second, if available; details for the individual databases are as follows:
* A2PIC - R15 ct/sec of the 1st scan flux, where R15 is the counting
rate derived using the 1.5 X 3 degree FWHM FOV of the 2nd
layer of the argon counter and both layers of a xenon counter.
One R15 count/sec equals about 2.17x10-11 ergs/cm2/sec in
the 2-10 keV band.
* A4 - The fitted count rate for the source, taking into account all of
the data from the mission, for channels A+B+C (13 to 80 keV).
* EMSS - The corrected IPC count rate in the 0.2-3.5 keV band. The count
rate is derived from the net counts, corrected for vignetting,
mirror scattering, and point response function scattering, and
the livetime, corrected for instrumental dead time.
* HRICFA - The corrected HRI count rate, obtained by summing all counts
within a circle of radius 18 arc seconds centered on the
source position, and then applying the HRI correction factors
for exposure time, vignetting, deadtime, mirror scattering,
and quantum efficiency.
* HRIDEEP - The HRI count rate, corrected for vignetting, scattering, dead
time, and detector efficiency.
* IPC - The corrected IPC count rate in the broad band (0.2 - 3.5 keV),
which may differ slightly from the value in the standard Rev 1B
processing.
* IPCDEEP - The IPC count rate in the broad band (0.16-3.5 keV), corrected
for source photons which fall outside the detect cell,
vignetting, background, and large angle scattering intrinsic
to the HEAO-2 mirror. (See the help file for the IPCDEEP
database for more details).
* IPCOSTARS - The corrected IPC count rate or upper limit thereof, in the
broad band (0.2-3.5 keV). To determine whether this is a
detection or upper limit, go to the IPCOSTARS database: if
Count_Rate_Flag = 1 for a source, the listed value is an upper
bound and not a detection.
* IPCSLEW - The IPC count rate in all 15 PI bins of the detector.
* LMCXRAY - The IPC count rate in the broad-band of 0.16 to 3.5 keV.
* SMCXRAY - The IPC count rate in the broad-band of 0.16 to 3.5 keV.
* IPCULTSOFT - The background-subtracted count rate of the X-ray source in
the 0.2 to 4.0 keV passband in units of ct/s. The
counts for each source were extracted within a circular region
of 3 arcmins radius centered on the source's catalog position.
* EXSS - The IPC photon ct/s for the aperture 1
(1.25 arcmin radius) detection.
* EINOPSLGAL - The Einstein IPC (X-ray) count rate measured for the galaxy,
in ct/s. This count rate has been corrected only for dead-time
and background.
* EINGALCAT - The background-subtracted Einstein X-ray count rate, in ct/s.
* EINGALCLUS - The Einstein IPC (X-ray) count rate, in ct/s, in the 0.5-4.5keV
energy band (IPC PI channels 4-11) within a fixed linear
aperture selected, if possible, to be a 1 Mpc radius (with an
assumed Hubble Constant of 50 km/s/Mpc). This count rate value
has been background subtracted and vignetting corrected. and
background.
* CMA - The average LE count rate in the 0.05-2.0 keV energy range.
* EXOHGLS - The average LE count rate in the 0.05-2.0 keV energy range.
* RASSBSC - The PSPC count rate corrected for vignetting in the energy band
from 0.1 - 2.4 keV.
* WGACAT - The background-subtracted PSPC count rate corrected for the
telescope vignetting and point spread function. The counts are
accumulated from PI bins 24 to 224 (0.24-2.0 keV).
* RBS - The RASS count rate in the total ROSAT PSPC bandpass
(0.1 - 2.4 keV), in ct/s.
* LMCHRIXRAY - The net HRI count rate, in ct/s. The count rate
from the observation in which the positional error of the source
was the smallest, is adopted.
* SMCROSXRY2 - The PSPC 0.1-2.4 keV count rate, in ct/s.
* ROSPSPC - The source count rate from ML or MDETEC algorithms (ct/s).
* RASSHGSOFT - The mean PSPC count-rate in ct/s as measured during the RASS,
and as quoted in the RASS BSC.
* RASSFSC - The vignetting-corrected source count rate in the broad energy
band (pulse height amplitude (PHA) channels 11 - 235), in ct/s.
* CHASFRXRAY - The ROSAT PSPC count rate in ct/s.
* LMCROSXRAY - The PSPC 0.1-2.4 keV count rate, in ct/s.
* SMCROSXRAY - The PSPC count rate in the 0.1-2.4 keV energy range, in ct/s.
* RASSCNS3 - The mean PSPC count rate, in ct/s.
* ROSHRI - The mean ROSAT HRI count rate, in ct/s.
* ROSNEPAGN - The count rate in the 0.1-2.4keV range, in ct/s.
* ROSNEPXRAY - The PSPC count rate in the 0.1-2.4keV range, in ct/s, corrected
for vignetting.
* ORIONXRAY - The corrected ROSAT HRI count rate in ct/s.
* RASSWD - The PSPC count rate in the 0.1-0.28 keV band.
* RASSOB - The mean PSPC count rate in ct/s.
* M31ROSXRAY - The count rate in the broad-band (0.1-2.4 keV), in ct/s.
* RASSDSSAGN - The RASS X-ray source count rate (0.1-2.4 keV), in ct/s,
corrected for vignetting.
* RASSDSSTAR - The RASS X-ray source count rate (0.1-2.4 keV), in ct/s,
corrected for vignetting.
* RASSDWARF - The mean PSPC count rate in ct/s.
* RASSEBCS - The final PSPC count rate in ct/s. Based on the original VTP
count rate in PHA channels 11 to 235. Statistical corrections
for low-surface-brightness emission that was not directly
detected and for contamination from point sources have been
applied.
* RASSGIANT - The mean PSPC count rate in ct/s.
* REFLEX - The uncorrected cluster count rate, in ct/s, as
measured with the GCA method and for the specfied aperture size.
* DXRBS - The observed ROSAT PSPC count rate for the source, in ct/s.
* PLEIADXRAY - The mean PSPC count rate of the X-ray source in counts per
second (converted by the HEASARC from the units of ct/ks in the
original table).
* HRASSCAT - The RASS PSPC count rate, in ct/s.
* NORAS - The RASS PSPC count rate, in ct/s.
* BHRFSCID - The ROSAT-FSC count rate, in ct/s.
* ASCAGIS - The 0.7-7.0 keV count rate corrected for vignetting (but not
for galactic interstellar absorption), in ct/s.
* ASCASIS - The estimated total broad-band count rate in front of the
telescope.
* ASCAGPS - The count rate observed at the GIS nominal position in the
0.7-7.0 keV energy band as obtained from image fitting analysis,
in ct/s/GIS.
* ASCALSS - The GIS count rate observed at the GIS reference position in
the 0.7-7.0 keV energy band and with an extraction radius of
6 arcminutes, in ct/s.
* TARTARUS - The combined SIS/GIS count rate in the 0.5-10.0 keV energy
range.
* BMWCHANCAT - The total-band (0.5-7.0 keV) count rate, in ct/s.
* CHANDFN2MS - The 0.5-8.0 keV ACIS count rate (corrected for vignetting),
in ct/s, calculated by dividing the counts in this band by
the effective exposure time.
* CHANDFS1MS - The 0.5-2 keV keV ACIS count rate (corrected for vignetting),
in ct/s.
* CHANDFS2MS - The net full band (0.5-8.0 keV) count rate, in ct/s, calculated
by dividing the full-band counts by the effective exposure time.
in ct/s. (Not corrected for vignetting.)
* CLANS - The net full band (0.5-8.0 keV) count rate, in ct/s, calculated
by dividing the full-band counts by the effective exposure time.
* CLASXS - The net full band (0.4-8.0 keV) count rate, in ct/s.
* M31CXOXRAY - The count rate (corrected for exposure, background variation,
and instrumental point spread function), in ct/s, determined
via aperture photometry.
* CHANEXTDFS - The net full band (0.5-8.0 keV) count rate, in ct/s, calculated
by dividing the full-band counts by the effective exposure time.
* XBOOTES - The full-band (0.5 - 7 keV) count rate, in ct/s, calculated
by dividing the full-band counts by the effective exposure time.
* COUP - The full-band (0.5 - 8 keV) count rate, in ct/s, calculated
by dividing the full-band net or background-corrected counts by
the product of the effective exposure time and the fraction of
the PSF at the fiducial energy of 1.497 keV enclosed within the
extracted area.
* CHAMPPSC - The full-band (0.5 - 8 keV) count rate, in ct/s, calculated
by dividing the full-band net or background-corrected counts by
the mean effective, vignetting-corrected exposure time.
* CHANTYPGPR - The normalized total-band (0.5 - 8 keV) count rate, in ct/s.
* IC1396NCXO - The full-band (0.5 - 8 keV) count rate, in ct/s, calculated
by dividing the full-band counts by the effective exposure time.
* IC348CXO - The exposure-time-corrected X-ray source count rate in the
0.2 - 8.0 keV ACIS energy band, in ct/s.
* TRIFIDCXO - The net count rate in the 0.5-8.0 keV band of the X-ray
source, in ct/s, derived from wavelet analysis.
* M17CXO - The net extracted total (0.5 - 8 keV) band count rate of the
X-ray source, in ct/s, calculated by dividing the net extracted
counts by the effective exposure time.
* M67CXO - The net, background-corrected, 0.3-7.0keV count rate, in ct/s.
* M81CXO - The aperture-corrected X-ray source count rate in the ~0.2 to
8.0 keV band, in ct/s.
* M87CXO - The background-corrected X-ray count rate in the 0.3 to 10 keV
band, in ct/s.
* MONR2CXO - The approximate, non-vignetting-corrected, 0.5-10.0keV count
rate, in ct/s, computed by dividing the net counts by the
effective exposure, 100 ksec, for all sources.
* NGC1333CXO - The average X-ray source count rate CR, in ct/s, as given by
CR = (C_xtr - B_xtr)/(f_PSF * E_net), where C_xtr are the source
counts, B_xtr the background counts, f_PSF the fraction of the
total counts extracted from the source extraction region
(typically ~0.9) and E_net = 37800 s is the effective exposure
time.
* NGC2244CXO - The estimated net extracted total (0.5 - 8 keV) band count rate
of the X-ray source, in ct/s, calculated by dividing the net
extracted counts by the effective exposure time.
* NGC2264CXO - The net background- and vignetting-corrected count rate, in
counts per second.
* NGC2362CXO - The count rate of the X-ray source, in ct/s, assumed by the
HEASARC to be in the 0.3 - 8.0 keV energy range, although this
needs to be confirmed.
* NGC4649CXO - The count rate (0.3 - 10 keV) of the X-ray source, in ct/s.
* NGC6357CXO - The X-ray (0.5 - 8 keV) count rate, in ct/s, calculated by
dividing the estimated counts by the effective exposure time.
* NGC6530CXO - The count rate of the X-ray source in the energy range from
0.3 - 8.0 keV, in ct/s, as measured using PWDetect, a
wavelet-based source detection algorithm.
* NGC752CXO - The X-ray (0.5 - 2.0 keV) source count rate, in ct/s.
* ORIONFFCXO - The net background- and vignetting-subtracted count rate of
the X-ray source in ct/s.
* ONCCXOXRAY - The net background- and vignetting-subtracted count rate of
the X-ray source in ct/s, computed by dividing the net source
counts by the Chandra effective exposure time.
* GC47TUCCXO - The 0.5 - 4.5 keV band count rate of the X-ray source, in ct/s,
calculated by dividing the background-subtracted counts by the
exposure time.
* ARCQUINCXO - The on-axis X-ray source broad-band (1 - 9 keV) count rate,
in ct/s.
* RCW49CXO - The X-ray (0.5 - 8 keV) count rate, in ct/s, calculated by
dividing the estimated counts by the effective exposure time.
* M33CHASE - The derived X-ray (0.35 - 8 keV) count rate, in ct/s.
* CYGOB2CXO - The X-ray (0.5 - 8 keV) count rate, in ct/s, calculated as the
ratio of the source photons in total band (corrected for the
PSF fraction outside the extraction box) to the exposure time.
* WD1CXO - The X-ray (0.5 - 8 keV) count rate, in ct/s, calculated as the
ratio of the source photons in the total band to the exposure
time. It does not include the ARF correction, and, hence,
for some sources, will be an underestimate of the true count
rate.
* GALCENCXO - The hard-band X-ray (2 - 8 keV) count rate, in ct/s, calculated
by dividing the net counts in the source region by the
effective exposure time.
* SDSSCXOQSO - The X-ray (0.3 - 8 keV) count rate, in ct/s, calculated
by dividing the net counts in the source region by the
vignetting-corrected exposure time.
* ECDFSCXO - The net full-band (0.5-8.0 keV) count rate, in ct/s.
* XMMSSC - The full-band count rate (0.2 - 12 keV) of the EPIC MOS1
detection, in ct/s.
* XMMGPS - The broad-band count rate (0.4 - 6.0 keV) of the EPIC PN
detection, in ct/s.
* M31XMMXRAY - The combined EPIC PN, MOS1, and MOS2 count rate, in ct/s, in
the XID band corresponding to the 0.2-4.5 keV energy range.
* M33XMMXRAY - The combined EPIC PN, MOS1, and MOS2 count rate, in ct/s, in
the XID band corresponding to the 0.2-4.5 keV energy range.
* XMMSLEWCLN - The full-band count rate (0.2 - 12 keV), in ct/s.
* XMMBSS - The source count rate in the 0.5 - 4.5 keV energy band, in ct/s.
* NGC2547XMM - The PN count rate of the X-ray source in the total band
(0.3 - 3 keV), in ct/s.
* LUPUS3XMM - The PN count rate of the X-ray source in the 0.5 - 4.5 keV
band, in ct/s.
* NGC2808XMM - The net (background- and vignetting-corrected) 0.5-10 keV
count rate of the X-ray source, in ct/s.
* NGC6231XMM - The PN count rate of the X-ray source in the 0.5 - 10.0 keV
band, in ct/s.
* NGC6530XMM - The vignetting- and background-corrected PN count rate of the
X-ray source in the 0.5 - 1.2 keV band, in ct/s.
* NGC752XMM - The XMM-Newton X-ray source EPIC (PN+MOS1+MOS2) count rate of
the X-ray source, in ct/s. The HEASARC believes the energy range
to be 0.5 - 2.0 keV.
* UPPRSCOXMM - The equivalent on-axis EPIC pn count rate, in ct/s, i.e., the
count rate that would be observed if the source was located on
the telescope axis.
* SIGORIXMM - The MOS-equivalent count rate of the X-ray source, in ct/s,
derived from the source detection algorithm run on the summed
MOS1+MOS2+PN dataset in the 0.3-7.8 keV energy band.
* NGC2516XMM - The MOS1-equivalent count rate of the X-ray source, in ct/s.
* OMEGCENXMM - The 0.5 - 5.0 keV band count rate of the X-ray source, in ct/s.
* CEPAXMM - The 1 - 10 keV band count rate of the X-ray source, in ct/s.
* TAURUSXMM - The PN-equivalent source count rate CR_F, in ct/s, in the
mosaicked EPIC full-band (0.5 - 7.3 keV) image.
* AXIS - The source count rate in the XID (0.5 - 4.5 keV) band, in ct/s.
* NGC2264XMM - Either the EPIC PN or the EPIC MOS count rate of the X-ray
source, in ct/s. (Refer to the associated flag field in the
original table.)
* XMMLSS - The EPIC PN count rate of the X-ray source, in ct/s, in the
2-10 keV energy band.
* CARINAXMM - The EPIC PN count rate of the X-ray source, in ct/s, in the
whole PN energy band, 0.4 - 10 keV.
* LOCKMANXM2 - The X-ray source count rate in the 0.5 - 10.0 keV energy
band, in ct/s. This is the combined all-EPIC point source
count rate, corrected for telescope vignetting and for the
fraction of counts outside the source extraction region.
* ELAISS1XMM - The full-band (0.5-10 keV) background-subtracted count rate of
the XMM-Newton X-ray source, in ct/s. The exposure times used
to calculate the count rates were obtained from the
corresponding exposure maps, and thus take into account all
spatial non-uniformities due to vignetting, chip geometry,
and CCD gaps.
* SXDSCAT - The sum of the medium (2 - 4.5 keV) band and ultrahard (4.5 -
10 keV) band vignetting-corrected count rates, in ct/s.
* XMMCOSMOS - The hard-band X-ray (2 - 10 keV) count rate, in ct/s, calculated
by dividing the hard-band counts in the source region by the
vignetting-corrected hard-band exposure time.
* XTEASSCAT - The source count rate in the 3 - 8 keV energy band, in
ct/s/PCU (Proportional Counter Unit).
Count_Rate_Error
The error in the X-ray count rate in ct/s.
Error_Radius
The radius of the 90-percent confidence error circle, in arcseconds.
For the XMMSSC database, we have added the statistical and systematic position
errors (which are given separately in that table) in quadrature in order to
obtain the quoted value. For database tables for which this information is not
explicitly given, the following estimates for the positional uncertainty can be
made: (i) for Einstein IPC databases, a value of about 60 arc seconds should be
approximately correct, except for the IPCSLEW database for which the authors
(Elvis et al.) estimate 72 arc seconds; (ii) for the ASCASIS database, Eric
Gotthelf estimates a typical value of 40 arc seconds, (iii) for the
ROSPSPC and ROSHRI databases, the typical values are 10 - 30 and 4 - 10
arcseconds, respectively, with the larger uncertainties for sources which
were detected at the edges of the fields of view, and (iv) for the XRBCAT and
the HEAO 1 databases, the positions are only very approximate and should, in
general, only be assumed to be accurate to the order of a degree, although some
individual entries from these tables are much more accurate than this value.
Flux
The X-ray flux in a characteristic bandpass in units of erg/cm2/s. This
quantity is usually obtained by multiplying the given count rate by a
conversion factor. Only a few of the constituent databases currently have
values for this parameter populated. The characteristic bandpasses for the
fluxes in such databases are as follows:
* AEGISX - 0.5 - 10.0 keV, uncorrected, observed frame
* AGNSDSSXMM - 2.0 - 8.0 keV
* ASCAGIS - 0.7 - 7 keV, corrected for galactic interstellar absorption
and using a best-fit power-law spectral model
* ASCAGPS - 0.7 - 7 keV, corrected for galactic interstellar absorption
and using a best-fit power-law spectral model
* ASCALSS - 0.7 - 7 keV, corrected for galactic interstellar absorption
and using a best-fit power-law spectral model
* AXIS - 0.5 - 10 keV
* BAXGALCLUS - 0.1 - 2.4 keV, calculated assuming the full Galactic column
density; i.e., the value adopted is the one that is appropriate
for extragalactic sources
* BMWCHANCAT - 0.5 - 7.0 keV, the total-band flux of the source, in
erg/s/cm2, calculated from the total-band count rate using a
fixed conversion factor COR_FAC0 of 1.0E-11 erg/cm2/ct
* CAIXA - 2.0 - 10.0 keV
* CDFSAGNCXO - 2.0 - 10.0 keV
* CHAMPHXAGN - 2.0 - 8.0 keV, corrected for Galactic absorption in the observed
frame
* CHAMPLANE - 0.5 - 2.0 keV, unabsorbed, calculated using the expression:
10.0^(f_x/f_R - (0.4 * R-magnitude) - 5.765)
* CHAMPPSC - 0.5 - 8.0 keV, assuming an X-ray power-law spectrum with a
photon index gamma = 1.4
* CHANDFN2MS - 0.5 - 8.0 keV, in the observed-frame, corrected for vignetting
and the continuous ACIS quantum efficiency degradation, but not
corrected for absorption by the Galaxy or intrinsic to the source
* CHANDFS1MS - 0.5 - 2 keV, calculated from the net count rate (obtained by
dividing the net counts by the effective exposure time, which
includes the effect of vignetting) and using the conversion
factor appropriate for the measured average spectrum of all the
sources, Gamma = 1.375 +/- 0.015
* CHANDFS2MS - 0.5 - 8.0 keV
* CHANEXTDFS - 0.5 - 8.0 keV, not corrected for Galactic or intrinsic absorption
* CHANNSGPSC - 0.3 - 8.0 keV, using the first of two possible Chandra
observations
* CHANSEXSI - 2.0 - 10 keV
* CHANTYPGPR - 2.0 - 10 keV
* CHESSCAT - 0.3 - 8.0 keV
* CLANS - 0.5 - 8.0 keV
* CLASXS - 0.4 - 8.0 keV
* CYDER - 2.0 - 8.0 keV
* DXRBS - 0.1 - 2.0 keV, not corrected for Galactic absorption and using a
conversion factor that was derived from the ROSAT PSPC count
rate using the observed hardness ratio and an assumed Galactic
hydrogen column density
* ECDFSCXO - 0.5 - 8.0 keV
* EINGALCAT - 0.2 - 4.0 keV
* ELAISCXO - 0.5 - 8.0 keV
* ELAISS1XMM - 0.5 - 10.0 keV
* EMSS - 0.3 - 3.5 keV
* EROSXMM - 2 - 10 keV
* GWSSTRPCXO - 0.5 - 10 keV
* HPERSEICXO - 0.3 - 8.0 keV, presumably
* IPCDEEP - 0.16 - 3.5 keV
* LALABOOCXO - 0.5 - 10.0 keV, Galactic absorption-corrected
* LOCKMANXMM - 2.0 - 10.0 keV
* LOCKMANXM2 - 0.5 - 10.0 keV
* M101CXO - 2.0 - 8.0 keV
* M31ROSXRAY - 0.2 - 4.0 keV, applying the spectral model of TF (thermal
bremsstrahlung with kT=5 keV and N_H_=7x1020 cm-2)
* M31XMMXRAY - 0.2 - 4.5 keV, based on combined EPIC PN, MOS1, and MOS2 data
* M33CXOXRAY - 0.3 - 8.0 keV
* M33XMMXRAY - 0.2 - 4.5 keV, based on combined EPIC PN, MOS1, and MOS2 data
* M33XMM2 - 0.2 - 4.5 keV, the maximum EPIC flux of the X-ray source in
the different observations in the XID band, calculated from the
vignetting-corrected count rate using the energy conversion
factors for the PN and MOS medium, thin and thick filter,
obtained by W3PIMMS, taking 100% of the source counts and
assuming a power-law spectrum with a photon index of 1.7
absorbed by the Galactic foreground column of 6 x 1020 cm^-2
* NGC2024CXO - 0.5 - 7.0 keV
* NGC2264CXO - 0.3 - 8.0 keV
* NGC2264CX2 - 0.5 - 7.0 keV
* NGC2516CXO - 0.1 - 4.0 keV, computed for an assumed distance of 387 pc
* NGC2516XMM - 0.3 - 7.9 keV
* NGC2808CXO - 0.5 - 8.0 keV, unabsorbed
* NGC2808XMM - 0.5 - 10.0 keV; the authors calculated the unabsorbed flux
from the count rate using energy conversion factors (ECFs)
* NGC4472CXO - 2.0 - 8.0 keV, based on model
* NORAS - see below for more information
* OMC2P3CXO - see below for more information
* ORIONFFCXO - 0.3 - 8.0 keV; the authors used the X-ray fluxes of the bright
sources obtained from a spectral analysis using 2-T absorbed
XSMEKAL thermal emission models to compute X-ray flux-weighted
conversion factors between count rates and X-ray fluxes for all
of the sources in each field
* PLEIADXRAY - 0.16 - 4.0 keV, computed for an assumed distance of 127 pc
* RASSCNS3 - 0.1 - 2.4 keV, using an energy conversion factor (ECF) to convert
the count rate in this bandpass to an X-ray flux calculated using
the formula ECF = (5.30 x HR + 8.31) x 10-12 erg/cm2/ct
* RASSDSSAGN - 0.1 - 2.4 keV, corrected for absorption within the Galaxy
* RASSDSSTAR - 0.1 - 2.4 keV, calculated from the count rate CR using the
formula: flux = CR * ECF, where ECF is 1.0 x 10-11 erg/cm2/ct
* RASSDWARF - 0.1 - 2.4 keV, calculated from the count rate CR using the
formula: flux = CR * ECF, where ECF is an individual
energy-conversion factor based on the hardness ratio HR of the
source given by ECF = (5.30 x HR + 8.31) x 10-12 erg/cm2/ct
* RASSEBCS - 0.1 - 2.4 keV
* RASSGIANT - 0.1 - 2.4 keV
* RBS - 0.5 - 2.0 keV, assuming a power-law spectrum with a photon
index of 2
* RBSCNVSS - 0.1 - 2.4 keV
* RCW108CXO - 0.3 - 8.0 keV, absorption-corrected, derived from the best-fit
spectral model
* RCW49CXO - 0.5 - 8.0 keV, estimated
* REFLEX - 0.1 - 2.4 keV, corrected for column density, X-ray temperature,
and K-Correction effects
* RIXOS - 0.5 - 2.0 keV
* RHOOPHCXO - 0.5 - 9.0 keV
* ROS13HRXMM - 0.2 - 10.0 keV, obtained from the sum of the individual band
fluxes
* ROS400GCLS - 0.5 - 2.0 keV, total unabsorbed X-ray flux
* ROSATRLQ - 0.1 - 2.4 keV, assuming a power-law spectrum and unabsorbed,
i.e., the flux which would have been measured without any
interstellar absorption
* ROSATRQQ - 0.1 - 2.4 keV, assuming a power-law spectrum and unabsorbed,
i.e., the flux which would have been measured without any
interstellar absorption
* ROSGALCLUS - 0.5 - 2 keV, total unabsorbed X-ray flux in the observer frame
* ROSNEPAGN - 0.5 - 2 keV, total unabsorbed X-ray flux in the rest frame
* ROSNEPXRAY - 0.5 - 2 keV, total unabsorbed X-ray flux
* ROXA - 0.1 - 2.4 keV, ROSAT All-Sky Survey X-ray flux
* SA57XMM - 0.5 - 10 keV
* SAX2TO10 - 2 - 10 keV, calculated assuming a power-law spectrum with an
energy index of 0.7
* SDSSCXOQSO - 0.5 - 8 keV, from Chandra
* SMCWINGCXO - 0.5 - 8 keV, from Chandra
* SPICESCXO - 2 - 10 keV, from Chandra
* SWIRECXO - 0.5 - 8 keV, from Chandra
* TARTARUS - 2 - 10 keV (excluding 5 - 7.5 keV), the SIS0 flux of the
best-fitting absorbed power-law model
* ULXRBCAT - variable bandpass, see below for more information
* UPPRSCOXMM - 0.5 - 8.0 keV
* WGCAT - 0.05 - 2.5 keV
* XBOOTES - 0.5 - 7 keV
* XMDSVVDS4S - 0.5 - 2 keV
* XMMCFRSCAT - 0.5 - 10 keV
* XMMCOSMOS - 2 - 10 keV
* XMMLSS - 2 - 10 keV
* XMMSSC - 0.2 - 12 keV, for the EPIC MOS1 detection only
* XMMSLEWCLN - 0.2 - 12 keV
* XMS - 2 - 10 keV
For some catalogs, the flux values have been calculated using the following
relation:
flux = lx / (1.20E+38 * distance2)
where lx is the X-ray luminosity in erg/s and the distance is in pc. This
relation is valid for fairly nearby objects. The following is a list of the
catalogs for this relation was used and their respective assumed distances:
* CENACXO - Used the larger of the two X-ray (0.4 - 10 keV) luminosities
(ignoring those values flagged as upper limits) and
3.5 Mpc for the distance to Centaurus A.
* CEPBOB3CXO - Used the absorption-corrected, 0.5 - 8.0 keV X-ray luminosity
and 725 pc for the distance to the Cepheus B star formation
region.
* CHAINTHCXO - Used the absorption-corrected, 0.5 - 8 keV X-ray luminosity
and 160 pc for the distance to the Cha I North cloud.
* ETGALCXO - Used the 0.3 - 7 keV X-ray luminosity and the known distance
to the specified host galaxy for each source.
* IC348CXO - Used the extinction-corrected, 0.2 - 10 keV X-ray luminosity
of the source, calculated based on the analysis of the X-ray
spectra as described in Section 5 of Preibisch & Zinnecker
(2002) and assuming a distance of 310 pc to IC 348.
* GC47TUCCXO - Used the 0.5 - 6.0 keV X-ray luminosity and 4850 pc for the
distance to 47 Tuc.
* M17CXO - Used the absorption-corrected, 0.5 - 8.0 keV X-ray luminosity
and 1600 pc for the distance to M 17.
* M33CXOXRAY - Used the total-band, 0.5 - 8.0 keV X-ray luminosity and
0.840 Mpc for the distance to M 33 as given in Grimm
et al. (2005).
* M81CXO - Used the 0.3 - 8.0 keV X-ray luminosity and 3.6 Mpc for the
distance to M 81.
* M87CXO - Used the 0.3 - 10.0 keV X-ray luminosity and 16 Mpc for the
distance to M 87.
* NGC1333CXO - Used the total-band 0.5 - 8.0 keV X-ray luminosity, corrected
for the estimated interstellar absorption, and a distance to
NGC 1333 of 318 pc.
* NGC2244CXO - Used the absorption-corrected, 0.5 - 8.0 keV X-ray luminosity
and 1400 pc for the distance to NGC 2244.
* NGC2264XMM - Used the 0.3 - 15 keV X-ray luminosity and 800 pc for the
distance to NGC 2264.
* NGC2362CXO - Used the 0.2 - 4.0 keV X-ray luminosity and 1500 pc for the
distance to NGC 2362.
* NGC253XMM - Used the best-fitting X-ray luminosity and 4.0 Mpc for the
distance to NGC 253.
* NGC2547XMM - Used the 0.3 - 3 keV X-ray luminosity and 417 pc for the
distance to NGC 2547.
* NGC4278CXO - Used the 0.3 - 8.0 keV X-ray luminosity and 16.1 Mpc for the
distance to NGC 4649.
* NGC4649CXO - Used the 0.3 - 10.0 keV X-ray luminosity and 16.8 Mpc for the
distance to NGC 4649.
* OMC2P3CXO - Used the absorption-corrected, 0.5 - 8.0 keV X-ray luminosity
and 450 pc for the distance to OMC-2/OMC-3.
* SIGORIXMM - Used the 0.3 - 8.0 keV X-ray luminosity and 352 pc for the
distance to the Sigma Orionis cluster.
* ULXRBCAT - The bandpass is variable; refer to the lower_energy and
upper_energy parameters in ULXRBCAT. The distance used is also
variables and comes from the distance parameter in ULXRBCAT.
For NORAS, the flux values are the final calculated "corrected" X-ray flux
values, using the best estimate for the temperature of the source and the
redshift of the spectrum but not the estimated missing flux from outside the
radius of significant X-ray emission.
Exposure
The exposure time of the observation, in seconds.
Class
The BROWSE object classification, if available.
Observatory
The name of the observatory or mission which originated the entry.