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"27029 results found.
- GRB980329 optical observations
- GRB980329 near-IR observations
- GRB980329 optical observations
- GRB980329 infrared observations
- GRB980329 optical observations
- GRB980329 VLA observations
- GRB980329 optical observations
- GRB980326 optical observations
- GRB980326 optical observations
- Optical Observations of GRB 970508
- GRB 971214: Redshift from Keck Observations
- GRB971214: Keck R & I-band Observations
- Optical Observations of the GRB 971227 field
- Optical Observations on GRB 971227
- GRB971227: Further CAHA R-band images
- GRB971227: LOTIS observations
- Sub-millimeter Observations of GRB 971214 at the JCMT
- GRB 971214: EUVE Observations
- GRB 971214: Redshift from Keck Optical Observations
- GRB 971214: Redshift from Keck Optical Observations
- GRB 971214: Apache Point Observatory Optical Observations
- GRB 971214: KPNO Optical Observations
- Optical Observations of GRB 971214 at Keck
- GRB 971214: Optical Observations
- Radio Observations of GRB 971214 at the VLA
- GRB 971024: Refined analysis by USNOFS Observations
- RXTE Observations of SGR 1814-13
- GRB 970828: Palomar Observations
- GRB 970228: Keck/LRIS Optical Observations