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.
Search for Circulars by submitter, subject, or body text (e.g. 'Fermi GRB').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
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"23151 results found.
- Konus-Wind observation of GRB 080721
- GRB 080721: Enhanced Swift-XRT position
- GRB 080721, Swift-BAT refined analysis
- GRB 080721 : Lulin Optical follow-ups
- GRB 080721: Swift detection of a burst with a bright optical counterpart.
- Trigger 317393: Swift detection of a possible GRB
- Trigger 317205: Swift detection of an outburst from XTE J1701-407
- GRB 080714: GROND confirmation of the optical/NIR afterglow
- Konus-Wind observation of GRB 080714
- GRB 080714: Swift/UVOT Detection of an Optical Afterglow
- GRB 080714: Swift-XRT refined analysis
- GRB 080714: Swift-BAT refined analysis
- GRB 080714: Swift detection of a burst
- GRB 080603B: optical observations in MAO
- GRB 080710: Optical observation with MITSuME Okayama
- GRB 080702B: Swift XRT confirmation of the afterglow
- GRB 080710, Swift-BAT refined analysis
- GRB 080710: Rapid PROMPT Observations
- GRB 080707: possible break in the X-rays
- GRB 080707, Swift-BAT refined analysis
- GRB 080707: Swift XRT refined analysis
- GRB 080707: GROND Detection of the Optical Afterglow Candidate
- GRB 080707: Swift detection of a burst
- Trigger 316063: Swift detection of a transient
- GRB 080703: GROND Upper Limits
- GRB 080702B: GROND Upper Limits
- GRB 080703: VLT observations of the afterglow
- GRB 080703, Swift-BAT refined analysis
- GRB 080702B Swift-BAT refined analysis
- GRB 080703: Swift detection of a burst with optical afterglow
- Swift/UVOT observation of GRB080702A
- GRB 080702B: Swift XRT and UVOT observations
- GRB 080625: Suzaku WAM observation of the prompt emission
- GRB 080702A, Swift-BAT refined analysis
- GRB 080702A: Swift-XRT Team refined analysis
- GRB 080702: Swift detection of a short burst
- TLS I-Band Observation of GRB 080701A
- GRB 080701A, Swift-BAT refined analysis
- Trigger 315630: Swift detection of a possible burst
- GRB 080701: Swift detection of a burst
- GRB 080623: Suzaku WAM observation of the prompt emission
- GRB 080625: Gamma Ray Burst Localization by SuperAGILE
- GRB 080623, Swift-BAT refined analysis
- GRB 080623: TAROT La Silla observatory optical observations
- GRB 080623: Swift detection of a burst
- Swift trigger 314975 is not a GRB
- Swift-BAT trigger 314975 possible burst
- GRB 080603b: optical observation
- GRB 070809: Putative host galaxy and redshift
- GRB 0800603A: optical observation
- GRB080613B: MITSuME upper limits
- GRB080613A: Optical upper limits with Okayama MITSuME telescope
- Konus-Wind observation of GRB 080613B
- GRB 080613B, Swift-BAT refined analysis
- GRB 080613B: Swift detection of a burst
- GRB 080613: Faulkes Telescope North optical candidate
- GRB 080613 : a long GRB detected with INTEGRAL
- Swift observations of BAT Slew Survey event (Trigger=010)
- GRB 080607: AGILE-MCAL observation of the prompt emission
- GRB080605: optical observation with the MITSuME-OAO telescope
- Konus-Wind observation of GRB 080607
- GRB080607: RTT150 optical observations
- GRB 080605: optical observations
- GRB 080607, Swift-BAT refined analysis
- GRB 080605: Swift-UVOT refined analysis
- GRB 080605, Swift-BAT refined analysis
- GRB 080605, Swift-BAT refined analysis
- GRB080605: observation by BOOTES
- GRB 080605: VLT redshift
- GRB 080605: Liverpool Telescope optical afterglow candidate
- GRB 080605: Swift detection of a burst with an optical afterglow
- GRB 080604: Xinglong R band observation
- GRB 080603A: Xinglong R band observation
- GRB 080603B: TLS Afterglow Observation
- GRB 080603A: TLS Afterglow Observation
- GRB 080604: MITSuME Okayama observation
- Swift/UVOT observations of GRB080604
- GRB 080604, Swift-BAT refined analysis
- GRB 080603B : Liverpool Telescope Observations
- Konus-Wind observation of GRB 080603B
- GRB 080603B: Swift-XRT refined analysis
- GRB 080603B: Swift/UVOT detection of the afterglow
- GRB 080603B, Swift-BAT refined analysis
- GRB 080603A: Swift/UVOT detection of the afterglow
- GRB080603B: RTT150 optical observations, break in light curves
- GRB 080604: Early Super-LOTIS Observations
- GRB080604: confirmation of optical afterglow
- GRB 080604: Swift detection of a burst with an optical afterglow
- GRB 080603B: TAROT Calern observatory confirmation of slow optical decay
- GRB 080516: TAROT La Silla observatory optical observations
- GRB 080603B: BOOTES2/TELMA optical observations
- GRB 080603B: TAROT Calern observatory detection of a plateau in the light curve
- GRB 080603B: Swift detection of a burst with optical afterglow
- GRB 080603: A long GRB detected by INTEGRAL
- Possible GRB080603: Faulkes Telescope North optical afterglow candidate
- SGR 1627-41: Chandra/RXTE/Swift Observations Scheduled
- GRB 080602, Swift-BAT refined analysis
- GRB 080602: Swift-XRT refined analysis
- Konus-Wind observation of GRB 080602
- GRB 080602: NOT R-band upper limit