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').
28 results found.
- GRB 201029A: Swift-XRT refined Analysis
- GRB 130606A: P60 Observations
- GRB 080319B: Jet Break, Energetics, Supernova
- GRB 071021: possible high-z burst
- GRB 050904: Second Epoch of HST/NICMOS Observations
- GRB 060928: Swift observations
- Host galaxy of GRB050904: 250 GHz upper limit with MAMBO at the IRAM 30m
- GRB 060323: Tautenburg OT candidate retraction
- GRB050922B: Swift-BAT detection of a weak long burst
- GRB 050904 BAT refined analysis of complete data set
- GRB 050904: Subaru Optical Spectroscopy
- GRB 050904: Keck I-band Imaging
- GRB 050904: more VLT NIR observations
- GRB 050904: BOOTES early R-band observation
- GRB 050904: Did SWIFT/XRT see the prompt GRB emission ?
- GRB 050904: More SOAR
- GRB 050904: photometric redshift
- GRB 050904: Swift/UVOT observations
- GRB 050904: Afterglow Astrometry
- GRB 050904: NIR object inside the XRT error box
- GRB 050904: early Swift XRT analysis results
- GRB 050904: SOAR YJ and PROMPT Ic Observations
- GRB 050904: BAT refined analysis of partial data set
- GRB 050904: TAROT optical measurements
- GRB 050904: Environmental Constraints
- GRB 050904: Possible High-Redshift GRB
- GRB 050904: SOAR/PROMPT Observations
- GRB 050904: TAROT optical limits