GCN Circulars Archive

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1. The Latest Circulars
2. Older Circulars
3. Bursts of Special Interest

This is the archive of the GCN Observation Report Circulars.

To learn more about the GCN Circulars and how to subscribe.

Please see the request for comments (RFC) on the discussion of proper content for these Circulars (i.e. Are theory-content Circulars to be allowed). [31 Jan 99]
Also see the addendum to the RFC. [04 Feb 99]
And see the Results of the RFC. [16 Feb 99]

(Listed in reverse serial number order -- newest first)

• 9349 GRB 090509, further Swift-BAT refined analysis
  
• 9348 Fermi Gamma-ray Burst Monitor trigger 263649437 is not a GRB
  
• 9347 GRB 090510B: Fermi GBM detection
  
• 9346 GRB 090502: Fermi GBM detection
  
• 9345 GRB 090510: correction to GCN 9344
  
• 9344 Konus-Wind observation of GRB 090510
  
• 9343 AGILE detection of GRB 090510
  
• 9342 GRB 090510: UVOT refined analysis
  
• 9341 GRB 090510: Swift XRT refined analysis
  
• 9340 GRB 090510: correction to coordinates in GCN 9338
  
• 9339 GRB 090510: Enhanced Swift-XRT position
  
• 9338 GRB 090510: NOT afterglow confirmation
  
• 9337 GRB 090510: Swift-BAT refined analysis
  
• 9336 GRB 090510: Fermi GBM detection
  
• 9335 GRB 090509: Swift-BAT refined analysis
  
• 9334 Fermi LAT detection of GRB 090510
  
• 9333 GRB 090509, SMARTS optical/IR afterglow observations
  
• 9332 GRB 090510: Swift/UVOT Detection of a Candidate Optical Afterglow
  
• 9331 GRB 090510: Swift detection of a short hard burst
  
• 9330 GRB 090408: optical upper limit
  
• 9329 GRB 090418A: optical observation
  
• 9328 GRB 090509: GROND further analysis and redshift limit
  
• 9327 GRB 090509: REM NIR afterglow
  
• 9326 GRB 090509: GROND afterglow candidate
  
• 9325 GRB 090509: Swift detection of a burst
  
• 9324 GRB 090323: optical observations
  
• 9323 GRB 090423: optical limit
  
• 9322 GRB 090423: 250 GHz upper limit for a z=8.2 GRB with MAMBO-2 at the IRAM 30m
  
• 9321 GRB 080913: 250 GHz upper limit for a z=6.7 GRB with MAMBO-2 at the IRAM 30m
  
• 9320 GRB 090424: optical observations
  
• 9319 GRB 090427: GROND observations
  
• 9318 GRB 090429A: ROVOR magnitude limit
  
• 9317 ICSP VLF observation of GRB090427 from two receivers
  
• 9316 ICSP VLF observation of GRB090424 from four receivers
  
• 9315 Refined analysis of ICSP VLF observation of SGR J1550-5418 bursts on 22nd January, 2009
  
• 9314 GRB 090428B: Suzaku WAM observation of the prompt emission
  
• 9313 GRB 090424, SMARTS optical/IR afterglow monitoring
  
• 9312 GRB 090426: optical observations
  
• 9311 GRB 090429D: Fermi GBM detection
  
• 9310 GRB 090429C: Fermi GBM detection
  
• 9309 GRB 090429B: Swift/UVOT Upper Limits
  
• 9308 GRB 090429A: Swift/UVOT Upper Limits
  
• 9307 GRB 090427: pseudo-z= 1.48 from prompt emission spectrum
  
• 9306 GRB 090429B: Gemini-N further nIR observations
  
• 9305 GRB 090424: YNAO-GMG observations
  
• 9304 GRB 090429A: Swift-XRT refined analysis
  
• 9303 GRB 090429A: GROND upper limits
  
• 9302 GRB 090427C: Fermi GBM detection
  
• 9301 GRB 090427B: Fermi GBM detection
  
• 9300 GRB 090426C: Fermi GBM detection
  
• 9299 GRB 090426B: Fermi GBM detection/observation
  
• 9298 GRB 090429B: Swift XRT refined analysis
  
• 9297 GRB 090429A: Enhanced Swift-XRT position
  
• 9296 Konus-Wind observation of very bright GRB 090427
  
• 9295 GRB 090428B: Fermi GBM detection
  
• 9294 GRB 090428: Fermi GBM detection
  
• 9293 GRB 090418A BVRcIc field calibration
  
• 9292 GRB 090426: GAO 150cm telescope Optical Observation
  
• 9291 GRB 090429B: RIMOTS optical upper limits
  
• 9290 GRB 090429B: Swift-BAT refined analysis
  
• 9289 GRB 090429A: Swift-BAT refined analysis
  
• 9288 GRB 090429B: Enhanced Swift-XRT position
  
• 9287 GRB 090429A - Correction to XRT position
  
• 9286 GRB090429B: Gemini-N infrared IR candidate
  
• 9285 GRB 090426: YNAO-GMG observations
  
• 9284 GRB 090429B: VLT upper limits
  
• 9283 GRB 090429B: GROND Observations
  
• 9282 GRB 090429B: Super-LOTIS early observations
  
• 9281 GRB 090429B: Swift detection of a burst
  
• 9280 GRB 090429: Swift detection of a burst
  
• 9279 GRB 090423: pseudo burst at z=1 and its relation to GRB 080913
  
• 9278 GRB 090424 : Multiband Optical observation from Nainital
  
• 9277 IPN triangulation of very bright GRB 090427
  
• 9276 GRB 090426: R-band limit
  
• 9275 GRB 090424: Continued R-band monitoring
  
• 9274 GRB 090423: CARMA mm observations
  
• 9273 GRB 090423: millimeter detection
  
• 9272 GRB 090426: Swift/BAT spectral lag results
  
• 9271 GRB 090425: Fermi GBM detection
  
• 9270 GRB 090424: Suzaku WAM observation of the prompt emission
  
• 9269 GRB 090426: VLT spectroscopy
  
• 9268 GRB 090426: GROND Observations of the Optical/NIR Afterglow
  
• 9267 GRB 090426: Near infrared observation with ISLE at OAO
  
• 9266 GRB 090426: Okayama MITSuME optical observation
  
• 9265 GRB090426 Swift/UVOT observations
  
• 9264 GRB 090426 Keck LRIS redshift
  
• 9263 GRB 090426: Swift-BAT refined analysis
  
• 9262 GRB 090426: Swift-XRT refined analysis
  
• 9261 GRB 090423: GROND second epoch imaging and refined SED
  
• 9260 Detection of bright radio afterglow of GRB 090424 with the VLA
  
• 9259 GRB 090426: Enhanced Swift-XRT position
  
• 9258 GRB090426: Observation for Optical counterpart from MIRO
  
• 9257 GRB 090426, RIMOTS optical upper limits
  
• 9256 GRB 090426: inspection of SDSS images
  
• 9255 GRB 090426: TNT confimation of optical counterpart
  
• 9254 GRB 090426: Swift detection of a burst with an optical counterpart
  
• 9253 GRB090424: R-band detection (37.5 hrs post-burst), jet break?
  
• 9252 GRB 090424: MASTER-Net prompt optical limit
  
• 9251 GRB 090423: Fermi GBM observation (correction of isotropic equivalent energy)
  
• 9250 GRB 090424: WHT ISIS spectroscopy
  
• 9249 VLA radio observation of high-z GRB 090423
  
• 9248 GRB090424: BVRI/R-band detection after 15 hrs burst
  
• 9247 GRB 090424 : Lulin 1m telescope optical observations
  
• 9246 GRB 090424: THO optical observations
  
• 9245 GRB 090424: GROND Observations of the Optical/NIR Afterglow
  
• 9244 GRB090423: Y-band limit
  
• 9243 GRB 090424 Gemini-South Redshift
  
• 9242 GRB 090423: Y-band field calibration update/correction
  
• 9241 GRB 090423: Swift/BAT spectral lag results
  
• 9240 GRB 090424 : TAOS optical detection
  
• 9239 GRB 090424 optical observations
  
• 9238 GRB 090424: Liverpool Telescope observations
  
• 9237 GRB 090424: Swift-XRT refined analysis
  
• 9236 GRB 090424: Optical observations from 1.23m CAHA
  
• 9235 GRB 090423: energetic, luminosity and jet break
  
• 9234 Swift/UVOT observations of GRB 090424
  
• 9233 GRB 090424: MASTER-Net prompt optical observations
  
• 9232 GRB 090424: Enhanced Swift-XRT position
  
• 9231 GRB 090424: Swift-BAT refined analysis
  
• 9230 GRB 090424: Fermi GBM Observation
  
• 9229 GRB 090423: Fermi GBM observation
  
• 9228 GRB 090422: Fermi GBM observation
  
• 9227 GRB 090423: Ep,i - Eiso correlation
  
• 9226 GRB 090424: SDSS Galaxy at the Swift position
  
• 9225 GRB 090424: TNT optical observations
  
• 9224 GRB 090424: ROTSE-III Confimation of Optical Counterpart
  
• 9223 GRB 090424: Swift detection of a burst with an optical counterpart
  
• 9222 GRB 090423: Refined TNG analysis
  
• 9221 GRB090423: Y-band field calibration
  
• 9220 GRB 090423 limiting magnitudes
  
• 9219 GRB 090423: VLT/ISAAC spectroscopy
  
• 9218 GRB 090423: Near infrared observation at Okayama Observatory
  
• 9217 GRB 090423: Deep z-band upper limit and confirmation of photo-z
  
• 9216 GRB 090423: TNG Amici spectrum