Browse this table... |
RASSHGSOFT - ROSAT All-Sky Survey: Soft High Galactic-Latitude X-Ray Sources |
HEASARC Archive |
Rxs
The 1RXS designation: this is the name of the X-ray source in the
RASS Bright Source Catalog (BSC) derived from its epoch 2000 position.
Name
The name of the optical counterpart to the X-ray source: notice that
this information is provided only for the 270 of the 397 sources that had
previously catalogued counterparts.
Source_Type
A specific type classification of the optical counterpart:
this is generally the spectral type for stellar counterparts, and for
extragalactic objects is generally the galaxy type, e.g Sy 1 for seyfert Type
1, BL for BL Lac, QSO for quasi-stellar object. In addition to these source
types, the following others are also used:
Source_type Meaning PN Planetary Nebula AM AM Her-type CV SSS Super-Soft Source LMXB Low-Mass X-Ray Binary WD White Dwarf
Offset
The angular separation between the optical and X-ray positions,
in arcseconds.
Offset_Sigma
The angular separation between the optical and X-ray positions,
in units of the 90% confidence radii r_90 of the X-ray source, where r90
is derived from the 1-sigma positional error delta_p given in the RASS BSC
by r_90 = 1.65 * delta_p.
RA
The right ascension of the X-ray source in the selected equinox, derived
by the HEASARC from the 1RXS designation (notice that this designation
was based on J2000 equinox co-ordinates in the original input table).
Assuming that the catalog creators followed the standard IAU procedure,
this co-ordinate has been truncated to the nearest 0.1 seconds.
Dec
The declination of the X-ray source in the selected equinox, derived
by the HEASARC from the 1RXS designation (notice that this designation
was based on J2000 equinox co-ordinates in the original input table).
Assuming that the catalog creators followed the standard IAU procedure,
this co-ordinate has been truncated to the nearest arcsecond.
LII
The galactic longitude of the X-ray source.
BII
The galactic latitude of the X-ray source.
RA2000_Optical
The right ascension of the optical counterpart in the J2000
equinox: notice that this information is not provided for the 270 of the
397 sources that had previously catalogued counterparts.
Dec2000_Optical
The declination of the optical counterpart in the J2000
equinox: notice that this information is not provided for the 270 of the
397 sources that had previously catalogued counterparts.
Count_Rate
The mean PSPC count-rate as measured during the RASS,
and as quoted in the RASS BSC: notice that this information is not provided
for the 270 of the 397 sources that had previously catalogued counterparts,
but can be found in the RASSBSC Catalog (q.v.).
Count_Rate_Error
rms uncertainty in count rate
Hardness_Ratio
The mean hardness ratio HR1 as measured during the RASS,
and as quoted in the RASS BSC: notice that this information is not provided
for the 270 of the 397 sources that had previously catalogued counterparts,
but can be found in the RASSBSC Catalog (q.v.). This parameter is defined
in the RASS by HR1 = (H-S)/(H+S) where S and H are the PSPC count rates in
the energy bands of 0.1-0.5 keV and 0.5-2.0 keV, respectively.
Hardness_Ratio_Error
rms uncertainty in HR1
Broad_Class
A broad classification of the optical counterpart as
either AGN, CV, QSO, WD (white dwarf), or star: notice that
this information is not provided for the 270 of the 397 sources that had
previously catalogued counterparts.
Redshift
The redshift of the optical counterpart, if extragalactic (and
known).
Flag_Redshift
An uncertainty flag for the redshift z that is set to ':'
if the redshift is regarded as uncertain.
Vmag
The visual (V) magnitude of the optical counterpart.
Notes
Notes on the object, mostly giving references, according to the
following key:
1: spectroscopic identification, this catalog 2: WFC identification (Pye et al., 1995, Cat. <J/MNRAS/274/1165>, Mason et al., 1995, Cat. <J/MNRAS/274/1194>) 3: Hamburg/RASS identification (Bade et al., 1998A&AS..127..145B) 4: Grupe et al., 1998A&A...330...25G 5: inferred identification from the Digitized Sky Survey (see Sect. 3.2) 6: radio source (see Sect. 3.2) 7: blank field 8: Remarks to individual sources in notes.dat file: the latter is available either at the CDS or ADC, or at: ftp://legacy.gsfc.nasa.gov/heasarc/dbase/misc_files/rasshgsoft/ 9: Remarks for 3 individual sources from Table 2 of the original paper (Thomas et al., 1998A&A...335..467T) that this catalog is derived from: 1RXS J035025.0+171455 (V471 Tau): HR1=-0.7, white dwarf companion (Werner & Rauch, 1997A&A...324L..25W and references therein), 1RXS J041521.5-073843 (40 Eri): HR1=-0.3, white dwarf companion, and 1RXS J132511.6-110932 (Spica): HR1=-0.9, coronal emission (Cassinelli et al., 1994ApJ...421..705C)
Class
The HEASARC browse classification, based on the value of the
broad_class and (if available) the source_type parameters.