ICRANet 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.

1. GRB 241025A: The discovery of a BdHN I from data of Swift, Fermi, SVOM and Einstein Probe telescopes
2. Request for Supernova related data for GRB 101023A
3. Redshift of GRB 110402A theoretically estimated
4. Redshift of GRB 110402A theoretically estimated (revised)
5. GRB 240825A: The nature of the afterglow motivates the search of the associated supernova
6. GRB 130702A in the Ep,i - Eiso plane
7. GRB 131024C: ICSP discovery of a burst in X-rays by balloon borne study
8. GRB 151027A: LCOGT-McDonald afterglow observations
9. GRB 151027B: LCOGT FTN afterglow observations
10. GRB 151029A: LCOGT-FTS afterglow observations
11. GRB 151111A: LCOGT-FTS afterglow observations
12. GRB 151114A: LCOGT-FTS afterglow observations
13. GRB 160104A: LCOGT-FTN afterglow candidate
14. GRB 160303A: LCOGT-FTN optical observations
15. GRB 180720B: Testing the universality of the newly born neutron star in BdHNe
16. GRB 180728A: A long GRB of the X-ray flash (XRF) subclass, expecting supernova appearance
17. GRB 190114C: A type 1 BdHN with TeV emission
18. GRB 210210A as a BdHN II
19. GRB 210410A: A twin of short GRB 090510 with complementary observations
20. GRB 210411C: A very significant early X-ray afterglow
21. GRB 211023A: A BdHN of type I
22. GRB 220101A: The most powerful GRB and BDHN I in 26 years
23. GRB 220101A: The first example of a Petanova
24. GRB 220527A: A BdHN I with a clear UPE phase
25. GRB 221009A: A type I BdHN of exceptional energetics
26. GRB 221009A X-ray light-curve and the indication of TeV light-curve
27. GRB 221009A: Peak luminosity of the supernova vs. synchrotron afterglow
28. GRB 221009A: Determination of the black holes mass and spin
29. GRB 230430A: A short GRB from a neutron star merger
30. transient AT2023sva: A Binary Driven Hypernova with a possible associated supernova