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').
23 results found.
- EP trigger ID 01709122294: 1.6m Mephisto multi-band optical observations
- GRB 241112B: Mephisto further optical observations
- GRB 241115A: Mephisto upper limits
- GRB 241113B: Mephisto upper limits
- GRB 241113A: 1.6m Mephisto and 50cm array optical upper limits
- GRB 241112B: Optical afterglow detection confirmation in revisiting the Mephisto data
- GRB 241112B: Mephisto optical upper limits
- EP241021a: Optical rebrightening observations with Mephisto
- GRB 241030A: Multiband optical detection with Mephisto
- GRB 241029A: GOTO optical afterglow detection
- GRB 241029A: Mephisto observations
- GRB 241018A/sb24101802: Mephisto optical upper limit
- GRB 241017A/sb24101702: Mephisto optical upper limit
- EP240913a/GRB 240913C: 1.6m Mephisto observations
- EP240918a: 1.6m Mephisto multi-band Optical Upper Limit
- GRB 240828B: Mephisto optical upper limit
- GRB 240825A: MASTER optical counterpart observation
- GRB 240825A: 1.6m Mephisto multi-band detection
- GRB 240811A: Upper limits with Mephisto
- GRB 240805B: Optical detection with 1.6m Mephisto
- LIGO/Virgo/KAGRA S240422ed: Observations with 1.6m Mephisto
- GRB231111A: MDM 2.4m Hiltner Telescope Observation
- GRB231111A: Optical follow-up observations with Mephisto