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').
777 results found.
- SVOM/GRM In-Flight Trigger of GRB 240716A
- GRB 240713A: 2.2m CAHA optical limit
- GRB240713A: Swift/UVOT Upper LImits
- GRB 240715A: GECAM-C detection of a short burst
- Konus-Wind detection of GRB 240715A
- GRB 240713A: Swift-XRT observations
- GRB 240715A: TRT optical upper limit on one Swift/XRT candidate
- SVOM/GRM In-Flight Trigger of GRB 240715A
- GRB 240713A: LAST optical upper limit
- GRB 240713A: optical upper limits from the INAF Asiago Observatory
- GRB 240713A: Tiled Swift observations
- GRB 240713A: J-band upper limit from WINTER
- GRB 240713A: NOT optical upper limits on three EP/FXT candidates
- GRB 240713A: JinShan optical upper limits
- GRB 240713A: OHP/T120 optical upper limit
- GRB240713A: X-ray follow-up observation with EP-FXT
- GRB240713A: Optical upper limit with Kinder observations
- Fermi Sub-threshold Observation of GRB240713A
- GRB240713A: TAROT and GRANDMA Observations of SVOM/ECLAIRs GRB240713A
- GRB240713A : The first probable GRB Located on-Board SVOM by ECLAIRs
- EP240708a: SVOM/C-GFT optical upper limit
- The first three GRBs detected by SVOM: X-ray Upper Limits from EP-WXT
- The first three GRBs detected by SVOM: GRB 240627B, GRB 240629A and GRB 240702A
- EP240420a: GWAC-F50A optical upper limit
- GRB 240402B: GWAC-F50A optical upper limit
- GRB 230816A: SVOM/C-GFT optical detection
- GRB 230216A: SVOM/C-GFT optical upper limit
- GRB 230205A: SVOM/C-GFT optical upper limit
- GRB 211227A: Lijiang 2.4m Telescope Optical Observations
- GRB 211023A: Xinglong 2.16m optical observations
- GRB 211023A: Xinglong 2.16m optical observations
- GRB 210619B: Xinglong TNT optical observations
- GRB 210321A: Xinglong GWAC-F60A optical observation
- GRB 210218A： GWAC-F60A optical upper limit
- GRB 210205A： GWAC-F60A optical upper limit
- GRB 210104A: GWAC-F60A optical afterglow observations
- GRB 201223A: SVOM-GWAC detected the optical counterpart during prompt emission phase
- GRB 201223A: GWAC-F60A optical afterglow observations
- GRB 201017A: Xinglong TNT upper limit
- GRB 200412B: Xinglong TNT optical observations
- LIGO/Virgo S200316bj: no counterpart candidate in SVOM/GWAC-F30 observations
- LIGO/Virgo S200316bj: no counterpart candidate in SVOM/GWAC observations
- LIGO/Virgo S200225q: no counterpart candidate in SVOM/GWAC observations
- LIGO/Virgo S200219ac: no counterpart candidate in SVOM/GWAC-F30 observations
- LIGO/Virgo S200219ac: no counterpart candidate in SVOM/GWAC observations
- LIGO/Virgo S200208q: no counterpart candidate in SVOM/C-GFT observations
- LIGO/Virgo S200128d: no counterpart candidate in SVOM/GWAC observations
- LIGO/Virgo S200115j: no counterpart candidate in SVOM/GWAC observations
- LIGO/Virgo S191222n: no counterpart candidate in SVOM/GWAC observations
- LIGO/Virgo S191205ah: no counterpart candidate in SVOM/GWAC observations
- LIGO/Virgo S190930s: no counterpart candidate in the SVOM/GWAC observations
- LIGO/Virgo S190901ap: no counterpart candidate in the SVOM/GWAC observations
- LIGO/Virgo S190901ap : SVOM/GWAC-F60A observation of transient ZTFabvizsw
- LIGO/Virgo S190828l: no counterpart candidate in the SVOM/GWAC observations
- LIGO/Virgo S190828j: no counterpart candidate in the SVOM/GWAC observations
- LIGO/Virgo S190630ag: no counterpart candidate in the SVOM/GWAC observations
- GRB 190627A : Xinglong 2.16m optical observation
- GRB 190530A: Xinglong 2.16m optical observation
- GRB 190530A: GWAC-F30 optical detection
- LIGO/Virgo S190521r: No optical counterpart from SVOM/GWAC-F30 observations.
- LIGO/Virgo S190521r: No optical counterpart from SVOM/GWAC observations.
- LIGO/Virgo S190521g: No optical counterpart from SVOM/GWAC-F30 observations.
- LIGO/Virgo S190521g: No optical counterpart from SVOM/GWAC observations.
- LIGO/Virgo S190512at: SVOM/GWAC-F60A observations
- LIGO/Virgo S190425z: SVOM/GWAC-F60A observations
- LIGO/Virgo S190412m: SVOM/GWAC observations of the initial skymap
- LIGO/Virgo G299232: SVOM/2.16-m Optical Telescope Observations of Swift UVOT Transient
- LIGO/Virgo G288732:SVOM/Mini-GWAC observations of the initial skymap
- LIGO/Virgo G284239:SVOM/Mini-GWAC observations of the initial skymap
- LIGO/Virgo G277583: SVOM/Mini-GWAC observations of the initial skymap
- LIGO/Virgo G275697: SVOM/Mini-GWAC observations of the initial skymap
- LIGO/Virgo G275404: SVOM/Mini-GWAC: Observations of initial skymap
- LIGO/Virgo G274296: Observations of initial skymap by project Mini-GWAC of SVOM
- LIGO/Virgo G270580: Observations of initial skymap by Project Mini-GWAC of SVOM
- LIGO/Virgo G268556: GWAC_F60B (60cm) follow-up two events of EWE001 and EWE002
- LIGO/Virgo G268556: observation regions by Project Mini-GWAC of SVOM
- LIGO/Virgo G211117: List of near-term future observation regions by Project Mini-GWAC of SVOM