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').
13 results found.
- GRB 170921A: 15 GHz upper limits from AMI
- Correction to GCN Circular 21919: GRB 170921C: Insight-HXMT detection
- GRB 170921A: RATIR Optical Afterglow Detection and NIR Observations
- GRB 170921A: Swift/UVOT Upper Limits
- GRB 170921A: Swift-BAT refined analysis
- GRB 170921A: LCO 2m telescope observations
- GRB 170921A: NOT optical observations
- GRB 170921A: Nanshan optical upper limit
- GRB 170921A: Enhanced Swift-XRT position
- GRB 170921A: MITSuME Okayama upper limits
- GRB 170921A: Swift-XRT refined Analysis
- GRB 170921A: TAROT Calern observatory optical observations
- GRB 170921A: Swift detection of a burst