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.
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
Advanced Search
To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.
Lucene Examples (click to copy):
subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"
38 results found.
- GRB231115A: TURBO Pre-Burst Optical Upper Limits
- GRB 231115A: XMM-Newton observation
- GRB 231115A: Upper limit from CALET Gamma-Ray Burst Monitor
- GRB 231115A: Wendelstein Optical/Infrared Observations
- GRB 231115A: JinShan optical upper limits
- GRB 231115A : OHP/T120 optical upper limit
- GRB 231115A: optical observations from INAF observatories
- GRB 231115A: Non-detection of radio emission with CHIME/FRB
- MAGIC observation of GRB 231115A, a possible magnetar giant flare
- GRB231115A: Liverpool Telescope imaging
- GRB 231115A: NuSTAR Follow-Up Observations
- GRB 231115A: Swift/BAT-GUANO detection of a short burst
- GRB 231115A: Swift-XRT and Swift-UVOT observations
- Konus-Wind detection of GRB 231115A (a probable Magnetar Giant Flare from M82)
- GRB 231115A: AGILE/MCAL upper limits
- GRB 231115A: Insight-HXMT/HE detection
- GRB 231115A: GBM/Fermi Observations of a probable Giant Flare of Magnetar
- GRB 231115A : MITSuME Akeno and Okayama optical upper limits
- GRB 231115A: Gaoyazi/GOT follow-up and archival observations
- GRB 231115A / AT2023xvj: Updated GIT analysis
- GRB 231115A: archival Chandra X-ray observations
- GRB 231115A: Upper limits from a neutrino search with IceCube
- GRB 231115A: Kinder observations with Lulin observatory
- GRB231115A: GRANDMA Observations
- GRB 231115A: GOTO pre-burst limits of AT2023xvj
- GRB 231115A: Non-detection in low-latency of gravitational waves with LIGO/Virgo/KAGRA
- GRB 231115A: pre-burst ZTF upper limits for GRB optical counterpart candidate
- GRB 231115A: MASTER optical observations
- GRB 231115A (short): Glowbug gamma-ray detection
- GRB 231115A: Fermi Observations of a probable Magnetar Giant Flare from M82
- GRB 231115A: archival HST observations
- GRB 231115A: GROWTH-India discovery of a potential optical counterpart
- GRB 231115A: Swift ToO observations
- Fermi GRB 231115A: Global MASTER-Net observations report
- GRB 231115A: significance of INTEGRAL localization alignment with M82
- GRB 231115A: a short hard GRB detected by IBAS, poistionally coincident with M82
- GRB 231115A position consistent with M 82 galaxy
- GRB 231115A: Fermi GBM Final Real-time Localization