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"12272 results found.
- Konus-Wind observation of GRB 131014A
- GRB 131014A: NOT afterglow candidate
- GRB 131014A: Nanshan optical observations
- GRB 131014A: Swift detection of a possible X-ray afterglow
- GRB 131014A Tiled Swift observations
- GRB 131014A: Fermi-LAT detection
- GRB 131014A: Fermi GBM detection
- GRB 131011A: Fermi GBM detection
- iPTF 13dsw/Fermi403206457: X-Shooter redshift
- Swift-XRT detection of iPTF 13dsw/Fermi403206457
- Fermi403206457: continued P60 observations and fading behavior
- Fermi403206457: Weihai optical upper limit
- Fermi403206457: NOT optical observations
- Fermi403206457: iPTF detection of a possible optical afterglow
- GRB 131004A: Fermi GBM observation
- GRB 131002A: Fermi GBM observation
- Fermi Gamma-ray Burst Monitor trigger 402405063 / 131002466 is not a GRB
- IPN Observations of GRB 130925A
- Fermi LAT Upper Limits on GRB 130925A
- GRB 130925A: Fermi GBM Detection
- Konus-Wind observation of GRB 130925A
- Observation of possible GRB/TDE 130925A by INTEGRAL/SPI-ACS: three activity episodes
- GRB 130925A Swift-BAT refined analysis
- Fermi GBM detection of GRB 130925A and a possible precursor
- IPN Triangulation of SGR-like burst 130913 - probable association with SGR/AXP 1E1841-045
- GRB 130702A: RTT150 optical observations
- Fermi Trigger 401326696: MASTER prompt optical observations
- Fermi/GBM Detection of two SGR-like bursts possibly associated with SGR J1833-0832
- Konus-Wind observation of GRB 130912A
- GRB 130912A: Fermi GBM detection
- GRB 130828A: Further Swift XRT observations
- GRB 130907A: INTEGRAL/SPI-ACS light curve
- Errata of GRB name in GCN 15196: should have been GRB 130907A instead of GRB 120916A
- GRB 120916A: Fermi-LAT detection of a burst
- GRB 130903A: Fermi GBM observation
- IPN triangulation of GRB 130828A - error box
- GRB 130828A: Swift XRT and UVOT observations
- IPN triangulation of GRB 130828A
- GRB 130828A Tiled Swift observations
- GRB 130828A: Fermi GBM detection
- GRB 130828A: Fermi-LAT detection of a burst
- IPN triangulation of GRB130821A
- Konus-Wind observation of GRB 130821A
- GRB 130821A: Swift-XRT observation
- GRB 130821A: Fermi-LAT detection of a burst
- GRB 130821A: Fermi GBM Detection
- Fermi Gamma-ray Burst Monitor trigger 398555975 / 130818916 is not a GRB
- GRB 130816A: Fermi GBM observation
- Konus-Wind observation of GRB 130804A
- IPN localization of GRB 130804A
- GRB 130804A; Fermi GBM observation
- GRB 130803A; Fermi GBM observation
- GRB 130727A: Fermi GBM detection
- Fermi Gamma-ray Burst Monitor trigger 396484884 / 130725945 is not a GRB
- Fermi Gamma-ray Burst Monitor trigger 396533554 / 130726509 is not a GRB
- Fermi Gamma-ray Burst Monitor trigger 396447899 / 130725517 is not a GRB
- GRB 130702A in the Ep,i - Eiso plane
- GRB 130716A: Fermi GBM observation
- GRB 130702A : Xinglong TNT continue optical observation
- GRB 130715A: Fermi GBM detection
- GRB 130702A: TNG spectroscopic observations of the emerging supernova
- GRB 130708A: Fermi GBM observation
- GRB 130702A: P200 Spectroscopic Confirmation of Associated Supernova
- GRB 130708A found in ground analysis of Swift-BAT data
- GRB 130702A: Xinglong TNT optical observation
- GRB 130702A (= Fermi 394416326): correction of the GCN #14988 title
- GRB 130702Ð
- Konus-Wind observation of GRB 130702A
- GRB 130702A: further TNG observations
- GRB 130702A: further Swift-XRT observations
- GRB 130702A: CARMA 3mm detection
- GRB 130702A: TNG optical observations
- GRB 130702A / Fermi394416326 : Nanshan optical observations
- IPN localization of GRB 130702A (= Fermi 394416326)
- Fermi GRB 130702A: Swift XRT and UVOT observations
- GRB 130702A / Fermi394416326: Fermi GBM detection
- GRB 130702A / Fermi394416326 : Fermi-LAT detection of a burst
- Fermi GBM trigger 394416326: MASTER early optical limit
- GRB 130628A: Fermi GBM detection
- Fermi394416326: iPTF detection of a possible optical afterglow
- Fermi GBM trigger 394325281 / 130630950 is not a GRB
- GRB 130701B: Fermi GBM detection
- GRB 130627A: Fermi GBM detection
- GRB 130623A: Fermi GBM detection
- GRB 130623A detected in ground analysis of Swift-BAT data
- Fermi/GBM observation of the Soft Gamma Repeater SGR J1550-5418
- GRB 130614A: Fermi GBM detection
- GRB 130612A: Fermi GBM observation
- GRB 130606B: Suzaku WAM observation of the prompt emission
- Recent Fermi GBM particle triggers misclassified as GRBs
- GRB 130609B: Fermi GBM observation
- GRB 130610A: Fermi GBM Observation
- GRB 130606B: Swift/UVOT Upper Limit
- GRB 130609A: Fermi GBM observation
- GRB 130606B: AGILE-MCAL observation
- GRB 130606B: Swift-XRT observations
- Konus-Wind observation of GRB 130606B
- GRB 130606B; Fermi GBM observation
- GRB 130606B: Fermi-LAT detection of a bright hard burst
- GRB 130604B: Fermi GBM detection