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').
10 results found.
- GRB 130903A: optical observations
- GRB 130903A: Further Swift XRT observations.
- GRB 130903A: Swift/UVOT Upper Limits
- GRB 130903A: GROND Afterglow Discovery
- GRB 130903A: MASTER early optical limit
- GRB 130903A: Fermi GBM observation
- GRB 130903A: Swift-XRT observations
- GRB 130903A: ISON-Kislovodsk optical Upper Limits
- GRB 130903A: GROND Upper Limits
- GRB 130903A: A long GRB detected by INTEGRAL