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').
11 results found.
- GRB 100117A: candidate optical afterglow
- GRB 100117A: Gemini North spectroscopy
- GRB 100117A: Fermi GBM detection
- Swift/UVOT refined analysis of GRB100117A
- GRB 100117A: Optical object inside the revised XRT error circle
- GRB 100117A: Swift-XRT refined analysis
- GRB 100117A: Gemini-North upper limit
- GRB 100117A: Magellan IMACS imaging
- GRB 100117A: Gemini South Imaging and CFHT Pre-Explosion Images
- GRB 100117A: Swift-BAT refined analysis
- GRB 100117A: Swift detection of a short hard burst