Skip to main content
End of Swift Science Operations, CHIME Notices Unavailable During Upgrade. See news and announcements

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"

12413 results found.

  1. Konus-Wind observation of GRB 160219A
  2. Fermi GBM trigger 477460274/160218161 is not a GRB
  3. Fermi GBM trigger 477985003/160224234 is not a GRB
  4. GRB 160223B: Khureltogot optical observations
  5. GRB 160223A: Fermi GBM observation
  6. GRB 160223B: LCOGT-FTN optical observations
  7. GRB 160223B: Fermi GBM observation
  8. GRB 160221A: Fermi GBM observation
  9. GRB 160219A: Fermi GBM detection
  10. GRB 160220A: nIR observations at AAT
  11. IPN Triangulation of GRB 160219A (short/hard)
  12. GRB 160220A: Fermi GBM observation
  13. LIGO/Virgo G184098: MASTER arhival results
  14. Konus-Wind observation of GRB 160216A (and GRB 160216B)
  15. Fermi GBM trigger 477254668/160215781 is not a GRB
  16. GRB 160206B: Fermi GBM detection
  17. GRB 160206B: iPTF P48 Observations and Optical Transient Candidates
  18. Fermi GBM trigger 475675010/160128498 is not a GRB
  19. GRB 160118A CALET Gamma-Ray Burst Monitor detection
  20. Konus-Wind observation of GRB 160113A
  21. GRB 160106A: CALET Gamma-Ray Burst Monitor detection
  22. IPN Triangulation of GRB 160113A
  23. Konus-Wind observation of GRB 151231A
  24. GRB 160113A: Swift-XRT observations
  25. GRB 160113A: Fermi GBM detection
  26. GRB 160113A: Swift ToO observations
  27. GRB 160113A: iPTF P48 Observations and Optical Transient Candidates
  28. Konus-Wind observation of GRB 160107A
  29. IPN Triangulation of GRB 151231A
  30. GRB 160107A: CALET Gamma-Ray Burst Monitor detection
  31. GRB 160107A: Fermi GBM observation
  32. Konus-Wind observation of GRB 160101A
  33. GRB 160104A: Fermi GBM observation
  34. LIGO/Virgo G211117: Fermi/LAT observations
  35. GRB 160101B: Fermi-LAT detection
  36. GRB 160101B: Fermi GBM detection
  37. GRB 160101A: Fermi GBM observation
  38. GRB 151231B: Fermi GBM observation
  39. GRB 151231A: Fermi GBM observation
  40. Konus-Wind observation of GRB 151227B
  41. IPN Triangulation of GRB 151227B
  42. GRB 151229A: Fermi GBM observation
  43. GRB 151228B: Fermi GBM observation
  44. LIGO/Virgo G211117: DESGW program observations with DECam
  45. LIGO/Virgo G211117: Fermi GBM Observations
  46. GRB 151228A: Fermi GBM observation
  47. GRB 151227B: Fermi GBM detection
  48. GRB 151227A: Fermi GBM detection
  49. Konus-Wind observation of GRB 151222A
  50. Fermi GBM trigger 472694170/151224997 is not a GRB
  51. IPN Triangulation of GRB 151222A (short/hard)
  52. Fermi GBM trigger 151221730 is not a GRB
  53. GRB 151222A: Fermi GBM detection
  54. Fermi GBM trigger 151221690 is not a GRB
  55. Fermi GBM trigger 472271765/151220108 is not a GRB
  56. Fermi GBM trigger 472166503/151218890 is not a GRB
  57. LIGO/Virgo G184098: Fermi-LAT search for high-energy gamma-ray counterpart
  58. GRB 151212B: CALET Gamma-Ray Burst Monitor detection
  59. GRB 151210B: Fermi GBM observation
  60. GRB 151210B: CALET Gamma-Ray Burst Monitor detection
  61. GRB 151205A: Fermi GBM detection
  62. Fermi GBM trigger 470712580/151202062 is not a GRB
  63. Fermi GBM trigger 470290196/151127174 is not a GRB
  64. Fermi GBM trigger 470375959/151128166 is not a GRB
  65. GRB 151122A: Fermi GBM detection
  66. GRB 151122A: Swift detection of a burst
  67. Konus-Wind observation of GRB 151120A
  68. GRB 151120A: Fermi GBM observation
  69. LIGO/Virgo G194575: Fermi GBM Observations
  70. LIGO/Virgo G194575: VLA follow-up
  71. GRB 151111A: Fermi GBM observation
  72. GRB 151107B: MASTER-NET OT detection inside the FERMI error box
  73. GRB 151107B: Mini-MegaTORTORA limits on simultaneous optical emission
  74. GRB 151107B
  75. GRB 151027A: the missing GeV component
  76. GRB 151030A: Fermi GBM observation
  77. Konus-Wind observation of GRB 151027A
  78. GRB 151027A: Fermi GBM observation
  79. Possible Fermi-LAT Gamma-ray counterpart for LIGO/Virgo G194575
  80. LIGO/Virgo G194575: Fermi GBM Observations
  81. LIGO/Virgo G194575: Identification of a GW CBC Candidate
  82. GRB 151021B: Fermi GBM detection
  83. Fermi GBM trigger 466602792/151015495 is not a GRB
  84. Fermi GBM trigger 466316973/151012187 is not a GRB
  85. Fermi GBM trigger 466059859/151009211 is not a GRB
  86. Konus-Wind observation of GRB 151006A
  87. GRB 151006A: Fermi-LAT detection
  88. GRB 151006A: Fermi GBM detection
  89. GRB 151001A: Fermi GBM detection
  90. Konus-Wind observation of GRB 150922A
  91. GRB 150922A: Fermi GBM observation
  92. IPN Triangulation of GRB 150922A (short/hard)
  93. LIGO/Virgo G184098: INTEGRAL search of temporally coincident prompt hard X-ray emission
  94. ANTARES neutrino detection: Fermi GBM Observations
  95. Fermi GBM trigger bn150920977 is not due to a GRB
  96. LIGO/Virgo G184098: DESGW followup program
  97. LIGO/Virgo G184098: DESGW followup program
  98. LIGO/Virgo G184098: Fermi-GBM ground-based follow-up
  99. Fermi GBM trigger 463890496/150914103 is not a GRB
  100. GRB 150912A: Fermi GBM observation

Advanced

Download all Circulars as a .tar.gz archive (updated once a day):
Questions or comments?
Contact GCN directly.
Have you found a bug in GCN?
Open an issue.
Want to contribute code to GCN?
Get involved on GitHub.

gcn.nasa.gov

A service of the Astrophysics Science Division at NASA Goddard Space Flight Center

Looking for U.S. government information and services? Visit USA.gov