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.
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 170524A: Swift-BAT refined analysis
- GRB 170524B: Swift detection of a burst
- GRB 170524A: Swift/UVOT Upper Limits
- GRB 170524A: Swift-XRT refined Analysis
- IPN Triangulation of GRB 170522A
- GRB 170524A: Enhanced Swift-XRT position
- GRB 170524A: Swift detection of a burst (or possible new SGR)
- GRB 170522A: LCO McDonald observations
- GRB 170522A: Swift-XRT observations
- GRB 170522A: Tiled Swift observations
- GRB 170522A: Fermi-LAT detection
- GRB170519A, Swift-UVOT Detection
- GRB 170519A: BOOTES-5/JGT early optical detection
- GRB 170519A: KAIT Optical Observations
- GRB 170519A: Swift-XRT refined Analysis
- GRB 170519A: Swift-BAT refined analysis
- GRB 170510A: LCO Siding Springs early observations
- GRB 170519A: Enhanced Swift-XRT position
- GRB 170519A: Swift detection of a burst with an optical counterpart
- GRB 170510A: Swift-XRT afterglow detection
- GRB 170516A: Swift-BAT refined analysis
- GRB 170516A: Swift-XRT refined Analysis
- AXP CXOU J164710.2-455216: Fermi GBM observation
- GRB 170516A: Swift/UVOT Upper Limits
- GRB 170516A: Enhanced Swift-XRT position
- GRB 170516A: Swift detection of a burst
- Swift Trigger AXP CXOU J164710.2-455216: MASTER-OAFA observations
- Swift Trigger on AXP CXOU J164710.2-455216
- GRB 170510A: LCO possible counterpart
- GRB 170510A: Swift-XRT observations
- GRB 170510A: Tiled Swift observations
- GRB 170510A: Fermi-LAT detection
- Swift Trigger 752193 is not a GRB
- Trigger 751928: Swift misidentification of Cen X-3
- Swift XRT observations of GRB 170424A
- LIGO/Virgo G284239: Swift/BAT data search
- GRB 170428A: 15 GHz upper limits from AMI
- Swift Trigger 748858: 15 GHz upper limits from AMI
- Short GRB 170428A: MASTER-OAFA final reduction of the optical observations
- GRB 170428A: TAROT La Silla observatory optical observations
- GRB 170428A: Swift/UVOT Upper Limits
- GRB 170428A: Swift-XRT refined Analysis
- GRB 170428A: Swift-BAT refined analysis
- Konus-Wind observation of GRB 170428A
- GRB 170428A: MASTER-OAFA early optical observations
- Swift Trigger 750337 is probably a noise fluctuation
- GRB 170428A: Swift detection of a short burst
- Swift trigger 750096 - OT candidate
- GRB170426.95 MASTER-Net OT detection
- Swift Trigger 750096 is probably a noise fluctuation
- Swift Trigger 750044 is probably a noise fluctuation
- GRB 170424A: LCO Observations
- GRB 170419A: Swift/UVOT Upper Limits
- GRB 170424A: Tiled Swift observations
- GRB 170424A: Fermi-LAT detection
- GRB 170419A: LCO Observations
- Swift Trigger 748858: AbAO and TSHAO optical observations
- Swift Trigger 748858: TAROT La Silla observatory optical observations
- Swift Trigger 748858: RATIR Optical and NIR Observations
- GRB 170419B, Swift-BAT refined analysis
- GRB 170419B: Zadko observatory - Gingin optical observations
- GRB 170419A: Zadko observatory - Gingin optical observations
- GRB 170419A: Swift-XRT refined Analysis
- GRB 170419B: Fermi GBM observation
- GRB 170419A: Swift-BAT refined analysis
- Swift trigger 748858: Swift BAT, XRT, and UVOT refined analysis
- GRB 170419B: Swift detection of a burst
- GRB 170419A: Enhanced Swift-XRT position
- Swift Trigger 748858: MASTER-OAFA early optical observations
- GRB 170419A: Swift detection of a burst
- Swift Trigger 748858: Zadko observatory - Gingin optical observations
- Swift Trigger 748858: a possible GRB
- GRB 170409A: Fermi-LAT detection
- GRB170405A, Swift-UVOT Detection
- GRB 170405A, Swift-BAT refined analysis
- GRB 170405A: Swift-XRT refined Analysis
- GRB 170405A: RATIR Optical and NIR Observations
- Konus-Wind observation of GRB 170405A
- GRB 170405A: LCO FTN observations
- Trigger 745966: Swift detection of 4U1850-03
- GRB 170405A: TAROT Reunion observatory optical observations
- GRB 170405A: Fermi-LAT detection
- GRB 170405A: Fermi GBM observation
- GRB 170405A: Enhanced Swift-XRT position
- GRB 170405A: Swift detection of a burst with an optical counterpart
- GRB 170330A CALET Gamma-Ray Burst Monitor detection
- IPN Triangulation of GRB 170403A (short)
- Konus-Wind observation of GRB 170330A
- Swift Trigger 745090 is a noise trigger near NGC 5195
- Swift triggered on SAX J1806.5-221
- GRB 170330A: AstroSat CZTI detection
- GRB 170330A: Swift-BAT refined analysis
- GRB 170331A: Swift-BAT refined analysis
- GRB 170331A: Swift/UVOT Upper Limits
- IceCube-170321A: Swift-XRT observations
- GRB 170330A: Swift-XRT refined Analysis
- GRB 170331A: Swift-XRT refined Analysis
- GRB 170330A: Enhanced Swift-XRT position
- GRB 170331A: Enhanced Swift-XRT position
- GRB 170330A: Swift/UVOT Detection of a Fading Afterglow