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.
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"
58 results found.
- GRB 250502A: Bassano Bresciano Observatory upper limit
- GRB 250430A: Bassano Bresciano Observatory upper limit
- GRB20250327B: 45th Parallel Observatory upper limit
- GRB 250103A: Bassano Bresciano Observatory upper limit
- GRB 240727A: VIRT Optical Upper Limit
- Fermi GRB 240828A: Bassano Bresciano Observatory upper limit
- GRB 240811A: Bassano Bresciano Observatory upper limit
- GRB 240809A: Bassano Bresciano Observatory optical observations
- GRB 240805B Bassano Bresciano Observatory upper limit
- EP240802A: Bassano Bresciano Observatory upper limit
- GRB 240727A: Correction to time in GCN36960
- GRB 240727A Bassano Bresciano Observatory upper limit
- Swift J1727.8-1613 (GRB 230824A): Bassano Bresciano Observatory optical observations
- GRB 230818A: Bassano Bresciano Observatory optical observations
- GRB 230812B: Further Bassano Bresciano Observatory optical observations
- GRB 230812B: Bassano Bresciano Observatory optical observations
- GRB 230805B: Bassano Bresciano observatory upper limit
- GRB 230723B: Bassano Bresciano Observatory upper limit
- GRB 230427A: GIT optical upper limit
- GRB 230427A: Bassano Bresciano Observatory upper limit
- GRB 230414B: Bassano Bresciano Observatory optical observations
- GRB 190106A: Swift/UVOT Detection
- GRB 190106A: Bassano Bresciano Observatory optical detection
- GRB 190103B: Bassano Bresciano observatory upper limit
- GRB 161004A: Bassano Bresciano Observatory upper limit
- GRB 160927A: Bassano Bresciano Observatory optical upper limit
- GRB 160925A: Bassano Bresciano Photometry of MASTER optical transient
- GRB 160824A: Bassano Bresciano Observatory upper limits
- GRB 160703A: Bassano Bresciano Observatory upper limits
- GRB 160504A: Bassano Bresciano Observatory upper limits
- GRB 160131A: Bassano Bresciano Observatory optical observations
- GRB 150413A: RTT150 optical observations
- GRB 150413A: Bassano Bresciano Observatory optical observations
- GRB 141031B: Bassano Bresciano Observatory upper limit
- GRB 140311A: Bassano Bresciano Observatory optical upper limit
- GRB 140206A: Bassano Bresciano Observatory optical upper limit
- GRB 131127B: Bassano Bresciano Observatory,archival confirmation of iPTF13ecv
- GRB 131202A: Bassano Bresciano Observatory optical upper limit
- GRB 131127B: Bassano Bresciano Observatory optical observations of iPTF13ecv
- GRB 131128A: Bassano Bresciano Observatory optical upper limit
- GRB 131127B: Bassano Bresciano Observatory optical observations
- GRB 131127A: Bassano Bresciano Observatory optical upper limit
- GRB 131030A: Bassano Bresciano Observatory optical observations
- GRB 130513A: Bassano Bresciano optical upper limit
- GRB 130504A: Bassano Bresciano Observatory optical upper limit
- GRB 130418A: Bassano Bresciano Observatory lightcurve analisis
- GRB 130418A: Bassano Bresciano Observatory optical observations
- GRB 120819A: Bassano Bresciano Observatory optical observations
- GRB 120816A: Bassano Bresciano Observatory optical observations
- GRB 120811C: Bassano Bresciano Observatory optical observations
- GRB 120326A: Bassano Bresciano Observatory - correction for GCN Cir 13178
- GRB 120326A: Cima Rest and Bassano Brescia
- GRB 120326A: Bassano Bresciano Observatory lightcurve analisis
- GRB 120326A: Bassano Bresciano Observatory optical observations
- GRB 120326A: Bassano Bresciano Observatory further optical observations
- GRB 120326A: Bassano Bresciano Observatory optical observations
- GRB 120116A: Bassano Bresciano Observatory optical observations
- GRB 120106A: Bassano Bresciano Observatory optical observations