GCN Circulars
GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. See the documentation for help with subscribing to or submitting Circulars.
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
Advanced Search
To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.
Advanced Search Examples (click to copy):
subject:"Swift"body:"GRB"submitter:"Judith Racusin"24365 results found.
- GRB 080413: ROTSE-III Detection of Optical Counterpart
- GRB 080411, Swift-BAT refined analysis
- GRB 080411: Swift-XRT Refined Analysis
- Konus-Wind observation of GRB 080411
- GRB 080411: VLT redshift
- GRB080330: MAGIC telescope GeV observation
- GRB 080411: Swift detection of a bright burst
- GRB 080409: Swift-BAT refined analysis
- GRB 080330 optical observations
- GRB 080408: Analysis of AGILE Gamma-ray data
- GRB 080408: GRB Localization by SuperAGILE
- GRB 080319A: Early RAPTOR optical limits
- GRB 080319B: Potential Jet Break Observed by Swift-XRT and UVOT
- GRB 080405: Mars Oddysey and Swift-BAT detection, possible host galaxy
- GRB 080325: optical upper limit
- GRB 080330: Prompt PROMPT Observations
- GRB 080319B: TORTORA light curve (Correction)
- GRB080328, RIMOTS optical upper limit
- GRB080330: optical observations
- GRB 080330, SMARTS optical/IR afterglow observations
- GRB 080328: Suzaku WAM observation of the prompt emission
- GRB080330: TNT optical observations
- GRB 080330, Swift-BAT refined analysis
- Konus-Wind observation of GRB 080328
- GRB080330: LOAO R-band Detection
- GRB 080330: Liverpool Telescope Optical observations
- GRB 080330A: ROTSE-III Detection of Optical Counterpart
- GRB 080328, Swift-BAT refined analysis
- GRB 080325, Swift-BAT refined analysis
- GRB080328: Faulkes Telescope North observations
- GRB 080328: Swift detection of a burst with an optical counterpart
- GRB080310, late-time photometry with LBT
- GRB 080325: MITSuME Akeno optical upper limits
- GRB 080325: GROND Observations
- GRB080319B: optical observations
- GRB 080319C: Gemini-North spectroscopic redshift
- GRB 080325: Early observations from OSN
- GRB 080319D: GROND Detection of the Optical Counterpart
- GRB 080325: Swift detection of a burst
- GRB 080319B : Apparent spectral evolution in very early Swift/XRT WT mode data: intrinsic or pile-up effect?
- IBAS Alert n. 5245: NOT a GRB
- GRB 080319C: Suzaku WAM observation of the prompt emission
- GRB 080320, Swift-BAT refined analysis
- GRB 080319B: Optical observation (Brno, CZ)
- GRB 080319D: GROND Observations
- GRB 080319B: TORTORA light curve
- GRB 080319B: optical upper limit
- GRB 080319D: optical upper limit
- GRB080319B: Time-Independent XRT Spectrum
- GRB 080319D, Swift-BAT refined analysis
- GRB 080319A: UVOT Observations
- GRB 080319B - CARMA mm Observations
- GRB 080320: optical limit
- Konus-Wind observation of GRB 080319C
- GRB 080319C, Swift-BAT refined analysis
- Konus-Wind observation of GRB 080319B
- GRB 080320: optical limit from IAC80
- GRB 080320: Swift detection of a burst
- GRB 080320: ROTSE-III Optical Limits
- GRB 080319B: ROTSE-III Observations of Optical Counterpart
- GRB 080319B: RAPTOR observations of a naked eye burst
- GRB 080319A: Swift-XRT Team Refined Analysis
- GRB 080319B, Swift-BAT refined analysis
- GRB080319B: Prompt PROMPT Detections
- GRB 080319C: Swift-XRT Team Refined Analysis
- GRB 080319C: AGILE-MCAL observation of the prompt emission
- GRB 080319D: MASTER-VWF-Kislovodsk optical observation
- GRB 080319C: MASTER-VWF-Kislovodsk optical observation
- GRB 080319D: Swift detection of a burst with a possible optical afterglow
- GRB 080319B: TORTORA synchronous observation
- GRB 080319A, Swift-BAT refined analysis
- GRB 080319B: REM early data
- GRB080319B Liverpool Telescope optical afterglow candidate
- GRB 080319B: REM observations
- Swift trigger 306323: Swift-BAT/XRT refined analysis
- GRB 080315: Optical observations
- GRB080310 : Optical observations by LOAO and Lulin
- GRB 080310: ROTSE-III Observations of Optical Counterpart
- GRB 080310: PAIRITEL detection and PAIRITEL+KAIT+UVOT SED
- GRB 080310: early RAPTOR multicolor observations
- GRB 080310, Swift-BAT refined analysis
- GRB 080310: Swift-XRT refined analysis
- GRB 080310, SMARTS optical/IR afterglow observations
- GRB 080310: REM observations
- GRB 080310 afterglow candidate (correction to UT time)
- GRB080229, optical upper limit (Correction)
- GRB080307, optical upper limit
- GRB080229, optical upper limit
- GRB 080307, Swift-BAT refined analysis
- GRB 080307: Gemini-N i-band observations - candidate afterglow
- GRB 080307, Preliminary Swift-BAT refined analysis
- GRB 080307: Optical observation with DMC/KANATA
- GRB 080303, Swift-BAT refined analysis
- GRB 080303: Rapid PROMPT Detections
- GRB 080303A: Faulkes Telescope South optical afterglow observations
- GRB 080303: Swift detection of a burst with optical afterglow
- GRB 080303A: ROTSE-III Optical Limits
- GRB 080229B: Gamma Ray Burst Localization by SuperAGILE
- GRB 080229, Swift-BAT refined analysis
- GRB 080229: Faulkes Telescope South optical limit