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').
534 results found.
- GRB 140423A: MITSuME Okayama Optical Observation
- GRB 140419A: MITSuME Ishigakijima Optical Observation
- GRB 140419A: MITSuME Okayama Optical Observation
- GRB 140408A: MITSuME Akeno Optical observation
- GRB 140408A: MITSuME Okayama upper limits
- GRB 140331A: MITSuME Okayama upper limits
- GRB 140302A: MITSuME Okayama upper limits
- GRB 140215A: MITSuME Okayama Optical Observation
- GRB 140211A: MITSuME Okayama upper limits
- GRB 140206A: MITSuME Akeno detection of the optical counterpart
- GRB 140102A: MITSuME Akeno Optical observation
- GRB 140129A: MITSuME Okayama upper limits
- GRB 140114A: MITSuME Okayama upper limits
- GRB 131030A: MITSuME Akeno Optical observation
- Swift Trigger 575905/ GRB 131026A: MITSuME Okayama and Ishigakijima Optical upper limits
- GRB 130831A: MITSuME Akeno Optical observation
- GRB 130806A: MITSuME Akeno Optical observation
- GRB 130806A: MITSuME Okayama upper limits
- GRB 130725A: MITSuME Ishigakijima Optical Observation
- GRB 130722A: MITSuME Okayama upper limits
- GRB 130701A: MITSuME Akeno Optical observation
- GRB 130612A: MITSuME Okayama upper limits
- GRB 130604A: MITSuME Okayama upper limits
- GRB 130603A: MITSuME Akeno Optical observation
- GRB 130603A: MITSuME Okayama Optical Observation
- GRB 130511A: MITSuME Okayama upper limits
- GRB 130508A: MITSuME Akeno upper limits
- GRB 130508A: MITSuME Okayama upper limits
- GRB 130505A: MITSuME Akeno Optical observation
- GRB 130505A: MITSuME Okayama Optical Observation
- GRB 130504A: MITSuME Okayama upper limits
- GRB 130427A: MITSuME Ishigakijima Optical Observation after 5 days
- GRB 130427A: MITSuME Ishigakijima Optical Observation after 2 days
- GRB 130427B: MITSuME Ishigakijima upper limits
- GRB 130427A: MITSuME Okayama and Ishigakijima Optical Observation after 1 day
- GRB 130427B: MITSuME Okayama upper limits
- GRB 130427A: MITSuME Okayama Optical Observation
- GRB 130427A: MITSuME Akeno Optical observation(T0+8000s~)
- GRB 130306A: MITSuME Ishigakijima upper limits
- GRB 130216A: MITSuME Ishigakijima upper limits
- GRB 130215A: MITSuME Okayama Optical Observation
- GRB 130131A: MITSuME Akeno Optical upper limits
- GRB 130131B: MITSuME Akeno Optical upper limits
- GRB 130131B: MITSuME Okayama optical upper limits
- GRB 130131A: MITSuME Okayama optical upper limits
- GRB 121226A: MITSuME Okayama Optical upper limits
- GRB 121211A: MITSuME Okayama Optical Observation
- GRB 121128A: MITSuME Akeno Optical upper limits
- GRB 121108A: MITSuME Ishigakijima upper limits
- GRB 121028A: MITSuME Okayama Optical upper limits
- GRB 121024A: MITSuME Ishigakijima upper limits
- GRB 121024A: MITSuME Okayama Optical upper limits
- GRB 121011A: MITSuME Okayama Optical Observation
- GRB 120923A: MITSuME Okayama Optical upper limits
- GRB120911A: MITSuME Okayama Optical upper limits
- GRB 120819A: MITSuME Ishigakijima upper limits
- GRB 120819A: MITSuME Okayama Optical upper limits
- GRB 120804A: MITSuME Okayama Optical upper limits
- Erratum of subject line of GCN13570 (GRB 120803A => GRB 120803B)
- GRB 120803B: MITSuME Okayama Optical upper limits
- GRB 120803A: MITSuME Okayama Optical upper limits
- GRB 120803B: MITSuME Akeno Optical upper limits
- GRB120711B: MITSuME Ishigakijima upper limits
- GRB 120422A: MITSuME Ishigakijima upper limit
- GRB120404A: GROND observations show steeply decaying afterglow
- GRB 120404A: MITSuME Ishigakijima Optical Observation
- GRB 120404A: MITSuME Okayama Optical Observation
- GRB 120404A: MITSuME Akeno Optical upper limits
- GRB 120326A: MITSuME Ishigakijima Optical Observation at 3 days afterthe burst
- GRB 120328A: MITSuME Ishigakijima Optical Upper Limits
- GRB 120326A: MITSuME Ishigakijima Optical Observation at 2 days afterthe burst
- GRB 120327A: MITSuME Ishigakijima Optical Upper Limits at 1 day afterthe burst
- GRB 120327A: MITSuME Ishigakijima Optical Observation
- GRB 120326A: MITSuME Ishigakijima Optical Observation
- GRB 120320A: MITSuME Okayama Optical upper limits
- GRB 120311B: MITSuME Okayama Optical upper limits
- GRB120308A: MITSuME Ishigakijima Optical Upper Limits
- GRB 120215A: MITSuME Akeno Optical upper limits
- GRB 120219A: MITSuME Okayama Optical upper limits
- GRB 120215A: MITSuME Okayama Optical upper limits
- GRB 120212A: MITSuME Ishigakijima Optical Observation
- GRB 120212A: Errata of subject in GCNC 12936
- GRB 120211A: MITSuME Okayama Ks-band Observation
- GRB 120211A: MITSuME Okayama and Ishigakijima Optical upper limits
- GRB 120211A: MITSuME Okayama Ks-band upper limit
- GRB 120106A: MITSuME Okayama Optical Observation (update)
- GRB 120106A: MITSuME Okayama Ks-band upper limit
- GRB 120106A: MITSuME Okayama Optical upper limits
- GRB111228A: MITSuME Akeno photometry of the optical afterglow
- GRB111228A: Errata of MITSuME Okayama about GRB name in GCNC 12743
- GRB111228A: MITSuME Okayama Optical Observation
- GRB111225A: MITSuME Okayama optical upper limits
- GRB 111215A: MITSuME Okayama Optical upper limits
- GRB 111215A: MITSuME Akeno Optical upper limits
- GRB 111210A: MITSuME Okayama Optical upper limits
- GRB111210A: MITSuME Okayama J-band upper-limit
- GRB 111123A: MITSuME Okayama Optical upper limits
- GRB 111103B: MITSuME Akeno Optical upper limits
- GRB111029A: MITSuME Ishigakijima Optical Upper Limits
- GRB 111022A: MITSuME Akeno Optical upper limits