GCN Circulars
GCN Circulars are rapid bulletins submitted by and distributed to the community. 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"12191 results found.
- GRB 160625B: Global MASTER-Crimea prompt optical emission detection (fwd)
- GRB 160709A: MASTER early imaging Swift BAT error box
- GRB 160709A: Global MASTER Net Fermi GBM Alerts observations
- Konus-Wind observation of GRB 160709A (short/hard)
- GRB 160709A: Fermi-LAT detection
- GRB 160629A: Mondy optical observations
- GRB 160629A: AbAO optical observations
- Konus-Wind observation of GRB 160702A (short/hard)
- SGR 1935+2154: CALET Gamma-Ray Burst Monitor detections
- GRB 160705B: Swift-XRT refined Analysis
- GRB 160705B: Swift detection of a burst
- GRB 160705A/MAXI J0748-149: MAXI/GSC detection
- Konus-Wind observation of GRB 160703A
- GRB 160703A: Zadko observatory - Gingin optical observations
- GRB 160629A: Global MASTER Net Prompt OT observations
- Konus-Wind observation of GRB 160629A
- GRB 160629A: a long GBB detected by INTEGRAL
- GRB 160625B: TSHAO optical observations
- Konus-Wind observation of GRB 160620A
- Pi of the Sky detection of an optical flash accompanying GRB 160625B
- Konus-Wind observation of a bright burst from SGR 1935+2154
- SGR 1935+2154: AMI 15 GHz upper limits of the magnetar during outburst
- GRB 160625B: VLA Detection
- Konus-Wind observation of GRB 160625B
- GRB 160625B: Mini-MegaTORTORA detection of bright optical flash simultaneous with LAT event
- Fermi/GBM observation of a bright burst from magnetar SGR 1935+2154
- Swift-BAT refined analysis on the bright event from SGR 1935+2154
- Swift Trigger 701668 is probably not an astrophysical event
- Trigger 701590: Swift detection of a bright outburst from SGR 1935+2154
- GRB 160625B: RATIR Optical and NIR Afterglow Detection
- GRB 160625B: Fermi-LAT refined analysis
- GRB 160625B: Swift-XRT afterglow detection
- GRB 160625B: Fermi-LAT detection of a bright burst
- GRB 160624A: Swift-XRT refined Analysis
- GRB 160623A: Mondy optical observations
- GROND observations of GRB 160622A/SNR RCW 103/SGR 1617-5103
- Trigger 701182: Swift detection of SGR 1935+2154
- Konus-Wind observation of GRB 160623A
- GRB 160623A / Galactic transient: Fermi-LAT detection
- SGR 1617-5103 (BAT trigger 700791): Enhanced Swift-XRT position.
- Swift-BAT refined analysis of the recent outburst from SGR 1617-5103 (a.k.a. 1E 161348-5055 and 2E 1613.5-5053)
- Fermi GBM Trigger 160622573 is not a GRB
- GRB 160622A: Swift detection of a possible short GRB or a new SGR
- More FERMI GBM bursts from the magnetar SGR 1935+2154
- SGR 1935+2154: MAXI/GSC detection
- Fermi GBM trigger 488128598/160620637 is not a GRB
- Fermi GBM trigger 487974449/160618852 is not a GRB
- Konus-Wind observation of GRB 160612A
- BAT detection and localization of GRB 160612A
- IPN Triangulation of GRB 160612A (short/hard)
- GRB 160612A: Fermi GBM detection
- GRB 160611A: Swift-BAT refined analysis
- Swift detection of SWIFT J174540.2-290037
- Konus-Wind observation of GRB 160607A
- GRB 160607A: candidate optical afterglow from the NOT
- Trigger 689353 (possible transient near Sgr A*), Swift-BAT refined analysis
- GRB 160607A: Swift-XRT refined Analysis
- Trigger 689353: Swift detection of a transient near Sgr A*
- Fermi GBM trigger 486562774/160602514 is not a GRB
- GRB 160601A: Swift detection of a short hard burst
- Konus-Wind observation of GRB 160530A
- GRB 160525B: Swift-XRT refined Analysis
- Konus-Wind observation of GRB 160521B
- GRB 160521B: Theoretical estimate of the redshift and urgent need for further x-ray observations
- GRB 160521B: Swift/UVOT Upper Limits
- Another Swift detection of SGR 1935+2154 (trigger #687124)
- Swift detection of SGR 1935+2154
- GRB 160521B: Fermi-LAT detection
- GRB 160521A: a long GRB detected by INTEGRAL
- Konus-Wind observation of a bright burst from SGR 1935+2154
- FERMI GBM bursts from the magnetar SGR 1935+2154
- SGR 1935+2154: AbAO optical upper limit
- Fermi GBM triggers of SGR 1935+2154
- Trigger 686761: Swift detection of a bright burst from SGR 1935+2154
- Fermi GBM trigger 485205628 /160517806 is not a GRB
- Fermi GBM trigger 485124591/160516868 is not a GRB
- Trigger 686443: Swift detection of SGR 1935+2154
- Fermi GBM trigger 484906918/160514349 is not a GRB
- GRB 160509A: non-observation of VHE emission with HAWC
- GRB 160509A: TLS Tautenburg Afterglow Detection
- Konus-Wind observation of GRB 160509A
- GRB 160509A: MAXI/GSC refined analysis
- GRB 160509A: VLA Detection
- GRB 160509A: Fermi-LAT refined analysis
- GRB 160509A Gemini North candidate afterglow
- GRB 160509A: Swift-XRT afterglow detection
- Correction to GCN 19404; GRB 160509A: MAXI/GSC detection
- GRB 160227A: MAXI/GSC detection
- GRB 160509A: Fermi-LAT prompt detection of a very bright burst
- LIGO/Virgo G211117: Astrosat CZTI upper limits
- GRB160504A: Gemini NIR Observations
- GRB 160504A: Bassano Bresciano Observatory upper limits
- GRB 160504A: NOT upper limits
- GRB 160417A, the review of the sky area in plate archive
- ICECUBE-160427A : Pan-STARRS imaging and optical transients in the field
- GRB 160503A: Fermi-LAT detection
- GRB 160501A: TAROT Calern observatory optical observations
- GRB 160501A MASTER-NET early observations
- MASTER search for counterpart to the IceCube event 67093193 (run 127853)
- Archival observations by HAWC of IceCube HESE event of April 27, 2016