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').
26 results found.
- GRB 170202A: 15 GHz upper limits from AMI
- GRB 170202A: SMARTS optical/IR afterglow observations
- Konus-Wind observation of GRB 170202A
- GRB 170202A: SQUEAN Observation (2nd night)
- GRB 170202A: Zadko observatory - Gingin optical observations
- GRB 170202A: Etelman Observatory optical observations
- GRB 170202A: Swift-BAT refined analysis
- GRB 170202A: RATIR Optical and NIR Observations
- GRB 170202A: SQUEAN Observation
- GRB 170202A: LCO FTN observations
- GRB 170202A: Swift-XRT refined Analysis
- GRB 170202A: T100 observations
- GRB 170202A VLT/X-shooter redshift [minor correction]
- GRB 170202A: Xinglong 2.16m photometry and spectroscopic redshift
- GRB 170202A: Swift/UVOT Detection
- GRB 170202A: Enhanced Swift-XRT position
- GRB 170202A: MITSuME Akeno Optical Observation
- GRB 170202A: Redshift from OSIRIS/GTC
- GRB 170202A: NOT afterglow observations
- GRB 170202A: Kanata optical and infrared observations
- GRB 170202A: Zadko observatory - Gingin optical observations
- GRB 170202A: LCO Sutherland observations
- GRB 170202A: MASTGlobal ER-Net bright OT nonmonotonic light curve
- GRB 170202A: Mini-MegaTORTORA upper limits
- GRB 170202A : Xinglong TNT optical observation
- GRB 170202A: Swift detection of a burst with an optical afterglow