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.
Lucene Examples (click to copy):
subject:"Swift"body:"GRB"submitter:"Judith Racusin"17 results found.
- GRB 110915A, the review of the sky area in plate archives
- GRB 110915A: Konus-Wind and Swift/BAT joint spectral analysis
- GRB 110915A: Swift/UVOT Upper Limits
- GRB 110915A: GROND Upper limits
- GRB 110915A, Swift-BAT refined analysis
- GRB 110915A: Swift-XRT refined Analysis
- GRB 110915A: Deep Near-IR Limits from Magellan
- GRB 110915A: Deep Gemini-South i/z-band imaging
- GRB 110915A: MITSuME Okayama and Ishigakijima Optical upper limits
- GRB 110915A: NOT observations
- GRB 110915A: 1.23m CAHA I-band observations
- GRB 110915A: Enhanced Swift-XRT position
- GRB 110915A: GMG optical upper limit
- GRB 110915A: MITSuME Akeno Optical upper limits
- GRB 110915A: MASTER-Net early limit
- GRB 110915A: Prompt enhanced Swift-XRT position
- GRB 110915A: Swift detection of a burst