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').
30 results found.
- GRB 241025A: VIRT Optical Upper Limit
- GRB 241025A: VZLUSAT-2 detection
- GRB 241025A: radio detection with the VLA
- GRB 241025A: LBT optical observations
- GRB 241025A: The discovery of a BdHN I from data of Swift, Fermi, SVOM and Einstein Probe telescopes
- Konus-Wind detection of GRB 241025A
- GRB 241025A (EP241025a): Optical afterglow observations with the Tsinghua-Nanshan Optical Telescope
- GRB 241025A: further SAO RAS optical observations
- GRB 241025A: Swift/UVOT Detection
- GRB 241025A: SAO RAS optical observations
- GRB 241025A: Mondy optical observations
- GRB241025A: 1.3m DFOT optical afterglow detection
- GRB 241025A: optical photometry from Konkoly
- GRB 241025A: GROWTH-India Telescope optical observations
- GRB 241025A: COLIBRÍ Detection of the Afterglow
- GRB 241025A: Swift-XRT refined Analysis
- GRB 241025A: Fermi GBM Observation
- GRB 241025A: GRANDMA and Kilonova-Catcher optical afterglow detections and upperlimits
- Fermi GRB 241025A: Global MASTER-Net observations report
- Swift GRB 241025A: Global MASTER-Net observations report
- EP241025a (GRB 241025A): EP observations update
- GRB 241025A : SVOM/VT optical afterglow observations
- GRB 241025A: Enhanced Swift-XRT position
- GRB 241025A: NOT spectroscopic redshift of z = 4.20
- GRB 241025A: DDOTI Afterglow detection
- EP241025a (GRB 241025A): EP on-board trigger and autonomous follow-up observation
- GRB 241025A: SVOM/GRM observation
- GRB 241025A: TRT optical afterglow observation
- GRB 241025A: Fermi GBM Final Real-time Localization
- GRB 241025A: Swift detection of a burst with an optical counterpart