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').
29 results found.
- GRB 240825A: The nature of the afterglow motivates the search of the associated supernova
- transient AT2023sva: A Binary Driven Hypernova with a possible associated supernova
- GRB 230430A: A short GRB from a neutron star merger
- GRB 221009A: Determination of the black holes mass and spin
- GRB 221009A: Peak luminosity of the supernova vs. synchrotron afterglow
- GRB 221009A X-ray light-curve and the indication of TeV light-curve
- GRB 221009A: A type I BdHN of exceptional energetics
- GRB 220527A: A BdHN I with a clear UPE phase
- GRB 220101A: The first example of a Petanova
- GRB 220101A: The most powerful GRB and BDHN I in 26 years
- GRB 211023A: A BdHN of type I
- GRB 210411C: A very significant early X-ray afterglow
- GRB 210410A: A twin of short GRB 090510 with complementary observations
- GRB 210210A as a BdHN II
- GRB 190114C: A type 1 BdHN with TeV emission
- GRB 180728A: A long GRB of the X-ray flash (XRF) subclass, expecting supernova appearance
- GRB 180720B: Testing the universality of the newly born neutron star in BdHNe
- GRB 160303A: LCOGT-FTN optical observations
- GRB 160104A: LCOGT-FTN afterglow candidate
- GRB 151114A: LCOGT-FTS afterglow observations
- GRB 151111A: LCOGT-FTS afterglow observations
- GRB 151029A: LCOGT-FTS afterglow observations
- GRB 151027B: LCOGT FTN afterglow observations
- GRB 151027A: LCOGT-McDonald afterglow observations
- GRB 131024C: ICSP discovery of a burst in X-rays by balloon borne study
- GRB 130702A in the Ep,i - Eiso plane
- Redshift of GRB 110402A theoretically estimated (revised)
- Redshift of GRB 110402A theoretically estimated
- Request for Supernova related data for GRB 101023A