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.
Advanced Search Examples (click to copy):
subject:"Swift"body:"GRB"submitter:"Judith Racusin"16 results found.
- Correction to GCN 5278 & GCN 5279 (GRBs 060105 & 060109)
- GRB 060105: Upper limit on Host Galaxy
- GRB 060105: quick look analysis of the Suzaku/XIS afterglow observation
- GRB 060105: pseudo-z from spectral parameters of the prompt emission
- GRB 060105: Radio observations
- GRB 060105: MDM Observation
- Konus-Wind observation of GRB 060105
- GRB 060105: ISAS observations and near IR upper limit
- GRB 060105: Swift/UVOT upper limits
- GRB 060105: Mitsume optical observations
- GRB 060105: BAT refined analysis
- GRB 060105: XRT refined analysis
- GRB060105: Suzaku-XIS and -HXD observation plan
- GRB060105, optical observation
- GRB060105 : Kiso optical observation
- GRB060105: Swift detection of a bright long burst