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').
9 results found.
- GRB 090418A: optical observation
- GRB 090418A BVRcIc field calibration
- GRB 090418A: R and I band observation
- GRB 090418A: Konus-Wind and Swift/BAT joint spectral analysis
- GRB 090418A: RTT150 optical observations
- GRB 090418A: Swift/UVOT Detection of the Neighbouring Galaxy
- GRB 090418A: optical observations
- GRB 090418A: Swift/UVOT Observations
- GRB 090418A: ROTSE-III Refined Analysis