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').
22 results found.
- GRB 051227 : WIDGET simultaneous optical observations
- GRB 060313: Further analysis of the Swift-BAT bright short hard burst
- GRB051227: SARA Observations
- GRB 051227: Likely host galaxy underlying afterglow position
- GRB 051227: optical observation
- GRB 051227: Confirmed fading from Gemini observations
- GRB051227: further analysis of VLT images
- GRB 051227: optical afterglow
- GRB 051227: Swift/UVOT Upper Limits (Possible U-band
- GRB 051227: Gemini observations
- GRB 051227: Keck Spectroscopy
- GRB 051227: Magellan r'-band Imaging/Astrometry
- GRB 051227: refined analysis of VLT images
- GRB 051227: P60 Observations
- GRB 051227: MDM Observation
- GRB 051227: R-band object in the XRT error circle
- GRB 051227: Joint Swift-HETE Spectral Analysis
- GRB 051227: XRT refined analysis
- GRB 051227: Further analysis of the Swift-BAT burst
- GRB 051227: Refined analysis of the Swift-BAT burst
- GRB 051227, optical observation
- GRB 051227: Swift detection of a burst