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"19666 results found.
- GRB 160624A: Swift/UVOT Upper Limits
- GRB 160624A: Swift-XRT refined Analysis
- GRB 160624A: Fermi GBM observation
- GRB 160624A, Swift-BAT refined analysis
- GRB 160623A: Swift/UVOT Upper Limits
- GRB 160623A: RATIR Optical and NIR Observations, Afterglow Confirmation
- GRB 160624A: Enhanced Swift-XRT position
- GRB160624A:possible GRB host redshift
- GRB 160525B: 15 GHz upper limits from AMI
- GRB 160624A: Prompt enhanced Swift-XRT position
- GRB 160624A: Swift detection of a short burst
- Swift detection of a dust-scattered halo around GRB 160623A
- GRB 160623A: Swift-XRT afterglow detection
- GROND observations of GRB 160622A/SNR RCW 103/SGR 1617-5103
- Trigger 701182: Swift detection of SGR 1935+2154
- GRB 160623A / Galactic transient: Fermi-LAT detection
- GRB 160623A: Swift ToO observations
- 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)
- BAT trigger 700791 (possible GRB 160622A) is SNR RCW 103
- GRB 160622A: Swift detection of a possible short GRB or a new SGR
- GRB 160612A: Swift-XRT observations
- BAT detection and localization of GRB 160612A
- GRB 160612A: Swift ToO observations
- IPN Triangulation of GRB 160612A (short/hard)
- GRB 160519A: 15 GHz upper limits from AMI
- GRB 160611A: Swift/UVOT observations
- GRB 160611A: Swift-BAT refined analysis
- Swift Trigger 690738 is not an astrophysical event
- GRB 160611A: Swift-XRT refined Analysis
- GRB160611.9 MASTER-Net OT detection
- GRB 160611A: Enhanced Swift-XRT position
- GRB 160611A: Swift-XRT observations
- GRB 160611A: Swift detection of a burst
- SWIFT J174540.2-290037, Swift-BAT refined analysis (trigger 690197)
- SWIFT J174540.2-290037, Swift-BAT refined analysis (trigger 689956)
- GRB 160607A CALET Gamma-Ray Burst Monitor detection
- Swift detection of SWIFT J174540.2-290037
- Swift detection of SWIFT J174540.2-290037
- Trigger 689956: Swift detection of a source near the Galactic center
- GRB 160607A: Swift/UVOT Upper Limits
- GRB 160607A: GROND confirmation of the afterglow
- Konus-Wind observation of GRB 160607A
- GRB 160504A: 15 GHz upper limits from AMI
- GRB 160417A: 15 GHz upper limits from AMI
- GRB 160408A: 15 GHz upper limits from AMI
- GRB 160607A: Swift-BAT refined analysis
- Trigger 689353 (possible transient near Sgr A*), Swift-BAT refined analysis
- GRB 160607A: Swift-XRT refined Analysis
- GRB 160607A: Enhanced Swift-XRT position
- GRB 160607A: Swift detection of a bright burst
- GRB 160530A: further Swift-XRT follow-up observations
- Trigger 689353: Swift detection of a transient near Sgr A*
- GRB 160601A: AbAO optical observations
- GRB 160601A: Discovery Channel Telescope Limits
- GRB 160601A: Swift/UVOT Upper Limits
- GRB 160601A: Swift-BAT refined analysis
- GRB 160601A: GTC observations confirming transient source decay
- GRB 160601A: Mondy optical observations, photometry of NOT sources
- GRB 160601A: Swift-XRT refined Analysis
- GRB 160601A: Enhanced Swift-XRT position
- GRB 160601A: Mondy optical observations
- GRB 160530A: Swift follow-up and X-ray afterglow candidate
- GRB 160601A: MASTER-Net observations
- GRB 160601A: Swift detection of a short hard burst
- GRB 160530A: discovery with the Compton Spectrometer and Imager
- GRB 160530A: Tiled Swift observations
- GRB 160525B: Mondy optical upper limit
- GRB 160525B: Khureltogot optical upper limit
- GRB 160525B: Swift-BAT refined analysis
- GRB 160525B: Swift-XRT refined Analysis
- GRB 160525B: Swift/UVOT Detection
- GRB 160521B: Swift-XRT afterglow detection
- GRB 160525B: Enhanced Swift-XRT position
- GRB 160525A: Swift-BAT refined analysis
- GRB 160525B: Prompt enhanced Swift-XRT position
- GRB 160525B: Swift detection of a burst
- GRB 160525A: Swift detection of a probable burst
- GRB 160327A: 15 GHz upper limits from AMI
- GRB 160321A: 15 GHz upper limits from AMI
- GRB 160314A: 15 GHz upper limits from AMI
- GRB 160313A: 15 GHz upper limits from AMI
- GRB 160521B: Swift/UVOT Upper Limits
- GRB 160521B: Swift-XRT observations
- Another Swift detection of SGR 1935+2154 (trigger #687124)
- Swift detection of SGR 1935+2154
- GRB 160521B: Swift ToO observations
- GRB 160521B: Fermi-LAT detection
- GRB 160519A: Swift-BAT refined analysis
- Swift-BAT trigger 686845 was due to noise near a known source
- GRB 160519A: Fermi GBM detection
- Konus-Wind observation of a bright burst from SGR 1935+2154
- FERMI GBM bursts from the magnetar SGR 1935+2154
- GRB 160519A: Swift detection of a burst
- 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 485124591/160516868 is not a GRB
- Trigger 686443: Swift detection of SGR 1935+2154
- Interplanetary Network Search for IceCube 160427A