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GCN Circulars

GCN Circulars are rapid bulletins submitted by and distributed to the community. See the documentation for help with subscribing to or submitting Circulars.

Search for Event Groups by event name (e.g. 'GRB 123456A', 'GRB123456A', '123456A').
EP250205a, GRB 250205A
    LIGO/Virgo/KAGRA S250205bk
      GRB 250204B
        GRB 250204A
          LIGO/Virgo/KAGRA S250204ax
            IceCube-250203A
              GRB 250202C
                LIGO/Virgo/KAGRA S250202cu
                  LIGO/Virgo/KAGRA S250202ad
                    GRB 250202B
                      GRB 250202A
                        GRB 250201A
                          LIGO/Virgo/KAGRA S250201i
                            GRB 250129A
                              GRB 250128B
                                GRB 250128A
                                  GRB 250127B
                                    GRB 250127A
                                      EP250125A
                                        GRB 250126A
                                          EP250125a
                                            GRB 250118B
                                              GRB 250122A
                                                LIGO/Virgo S250119cv
                                                  GRB 250121A
                                                    LIGO/Virgo/KAGRA S250105bn
                                                      GRB 250119C
                                                        LIGO/Virgo/KAGRA S250119cv
                                                          GRB 250117A
                                                            GRB 250119B
                                                              LIGO/Virgo/KAGRA S250119ag
                                                                GRB 250119A
                                                                  GRB 250118A
                                                                    LIGO/Virgo/KAGRA S250118dp
                                                                      LIGO/Virgo/KAGRA S250118az
                                                                        LIGO/Virgo/KAGRA S250118t
                                                                          GRB 250116A
                                                                            GRB 250114.55
                                                                              GRB 250114B
                                                                                LIGO/Virgo/KAGRA S250114ax
                                                                                  GRB 250114A
                                                                                    GRB 250113A
                                                                                      EP250109b
                                                                                        EP250111a
                                                                                          GRB 250107D
                                                                                            GRB 250107C
                                                                                              GRB 250109A, EP250109a
                                                                                                LIGO/Virgo/KAGRA S250109bi
                                                                                                  EP250108a
                                                                                                    LIGO/Virgo/KAGRA S250109f
                                                                                                      LIGO/Virgo/KAGRA S250108ha
                                                                                                        LIGO/Virgo/KAGRA S250108eo
                                                                                                          GRB 250108B
                                                                                                            GRB 250108A
                                                                                                              GRB 250107B
                                                                                                                GRB 250107A
                                                                                                                  GRB 250106A
                                                                                                                    LIGO/Virgo/KAGRA S250104v
                                                                                                                      GRB 250103B
                                                                                                                        GRB 250103A
                                                                                                                          EP250101a
                                                                                                                            GRB 250102A
                                                                                                                              IceCube-250102A
                                                                                                                                EP241231b
                                                                                                                                  IceCube-250101A
                                                                                                                                    GRB 250101B
                                                                                                                                      GRB 250101A
                                                                                                                                        GRB 250101.56
                                                                                                                                          LIGO/Virgo/KAGRA S241231du
                                                                                                                                            LIGO/Virgo/KAGRA S250101k
                                                                                                                                              LIGO/Virgo/KAGRA S241231bg
                                                                                                                                                LIGO/Virgo/KAGRA S241230ev
                                                                                                                                                  LIGO/Virgo/KAGRA S241230bd
                                                                                                                                                    GRB 241229C
                                                                                                                                                      GRB 241229B
                                                                                                                                                        GRB 241229A
                                                                                                                                                          GRB 241228B
                                                                                                                                                            GRB 241228A
                                                                                                                                                              GRB 241226A
                                                                                                                                                                LIGO/Virgo/KAGRA S241225v
                                                                                                                                                                  LIGO/Virgo/KAGRA S241225c
                                                                                                                                                                    IceCube-241224A
                                                                                                                                                                      GRB 241219A
                                                                                                                                                                        EP241223a
                                                                                                                                                                          GRB 241223A
                                                                                                                                                                            GRB 241221A
                                                                                                                                                                              GRB 241218A
                                                                                                                                                                                GRB 241217A, EP241217b
                                                                                                                                                                                  EP241217A
                                                                                                                                                                                    EP241217a
                                                                                                                                                                                      GRB 241214A
                                                                                                                                                                                        GRB 241215A
                                                                                                                                                                                          GRB 241215.58
                                                                                                                                                                                            GRB 241213B
                                                                                                                                                                                              EP241213a, GRB 241213A
                                                                                                                                                                                                GRB 241212A
                                                                                                                                                                                                  GRB 241211A
                                                                                                                                                                                                    LIGO/Virgo/KAGRA S241210fu
                                                                                                                                                                                                      LIGO/Virgo/KAGRA S241210cw
                                                                                                                                                                                                        LIGO/Virgo/KAGRA S241210d

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                                                                                                                                                                                                          Download all Circulars as a .tar.gz archive (updated once a day):
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