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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 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').
Advanced Search

To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.

Advanced Search Examples (click to copy):

subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

48 results found.

  1. EP Alert 260909.53: Global MASTER-Net observations report
  2. GRB 260317A: SVOM/ECLAIRs detection through offline targeted search and its possible association to magnetar 1E 1841-04.5
  3. Fermi-LAT Gamma-ray Observations of IceCube-260610A
  4. IceCube-260610A - IceCube observation of a high-energy neutrino candidate track-like event
  5. Swift detection of the Soft Gamma Repeater PSR J1647-4552
  6. Fermi-LAT gamma-ray observations of IceCube-240808A
  7. Fermi trigger No 722462310: Global MASTER-Net observations report
  8. IceCube-230708A - IceCube observation of a high-energy neutrino candidate track-like event
  9. IceCube-220221A - IceCube observation of a high-energy neutrino candidate track-like event
  10. GRB 220117B: Swift/UVOT Upper Limits
  11. Fermi-LAT Gamma-ray Observations of IceCube-211023A
  12. IceCube-211023A - IceCube observation of a high-energy neutrino candidate track-like event
  13. Fermi-LAT Gamma-ray Observations of IceCube-210730A
  14. Fermi-LAT Gamma-ray Observations of IceCube-201120A
  15. AX J1846.4-0258: Swift-BAT refined analysis
  16. Swift Detection of an SGR-like flare from AX J1846.4-0258
  17. Fermi-LAT ANTARES 200127.79 coincidence: MASTER alert observation and presence of young pulsar close to error-box
  18. LIGO/Virgo S191110af: Potential pulsar counterparts
  19. Fermi-LAT Gamma-ray Observations of IceCube-191001A
  20. Trigger 896552: Swift detection of PSR B1055-52
  21. Fermi-GBM Detection of possible burst from AXP CXOU J164710.2-455216/PSR J1647-4552
  22. Swift Trigger on AXP CXOU J164710.2-455216/PSR J1647-4552
  23. Fermi-LAT Gamma-ray Observations of IceCube-171106A
  24. Fermi-GBM Detection of possible burst from AXP CXOU J164710.2-455216/PSR J1647-4552
  25. Trigger 780207: Swift triggers again on AXP CXOU J164710.2-455216/PSR J1647-4552
  26. Swift Trigger on AXP CXOU J164710.2-455216/PSR J1647-4552
  27. Swift Trigger on AXP CXOU J164710.2-455216
  28. GBM observation of SGR-like burst from the direction of PSR 1119-6127
  29. Trigger 706396: Swift detection of a short burst from PSR 1119-6127
  30. Trigger 648422: Swift possible detection of a source in NGC4552
  31. IPN Triangulation of SGR-like burst 130913 - probable association with SGR/AXP 1E1841-045
  32. GRB130807A: Swift/UVOT observations
  33. GRB 120311A: Swift/UVOT Upper Limits
  34. GRB 120226A: Fermi-GBM and Fermi-LAT detections; LAT position retraction
  35. Swift detection of short bursts from PSR J1647-4552
  36. SGR J1834.9-0846: A Neutron Star in W41?
  37. Swift J1822.3-1606
  38. SGR 1E 1841-045: Swift detection of a soft gamma repeater burst
  39. GRB 101008: Swift/UVOT Upper Limits
  40. An SGR-like burst from the magnetar 1E 1841-04.5 in Kes 73
  41. GRB 060121: Confirmation of NIR Afterglow
  42. GRB 060121: Probable Detection of NIR Afterglow
  43. GRB 060121: candidate optical counterpart
  44. GRB060121: SARA Observations
  45. GRB 060121: optical observations
  46. GRB 060121: optical observations
  47. GRB050701: Swift-BAT Refined analysis
  48. Swift trigger 143708 is really GRB 050701

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