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').
14 results found.
- LIGO/Virgo/KAGRA S230627c: GECKO optical follow-up observations of host galaxy candidates and ZTF23aaptsuy/AT2023lxu
- LIGO/Virgo/KAGRA S230627c: observations of ZTF23aaptsuy/AT2023lx in AbAO observatory
- LIGO/Virgo/KAGRA S230627c: GRANDMA observations of galaxies and ZTF counterpart candidates
- LIGO/Virgo/KAGRA S230627c: Upper limits from Swift/BAT-GUANO
- LIGO/Virgo/KAGRA S230627c: Additional observations from the Zwicky Transient Facility
- LIGO/Virgo/KAGRA S230627c: ATLAS information on the ZTF candidates
- LIGO/Virgo/KAGRA S230627c: Upper limits from Fermi-GBM Observations
- LIGO/Virgo/KAGRA S230627c: Global MASTER-Net observations report
- LIGO/Virgo/Kagra S230627c: NED Galaxies in the Localization Volume
- LIGO/Virgo/KAGRA S230627c: Correction to HasMassGap probability
- LIGO/Virgo/KAGRA S230627c: Zwicky Transient Facility observations and candidates
- LIGO/Virgo/KAGRA S230627c: Coverage and upper limits from MAXI/GSC observations
- LIGO/Virgo/KAGRA S230627c: Updated Sky localization and EM Bright Classification
- LIGO/Virgo/KAGRA S230627c: Identification of a GW compact binary merger candidate