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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"

24420 results found.

  1. GRB 090925: Fermi GBM detection
  2. GRB090922A: correction to Fermi location
  3. GRB 090922A: Fermi GBM detection
  4. GRB 090715B: Skynet/PROMPT Detections
  5. GRB 090726: Skynet/GORT Observations
  6. GRB 090807: Skynet/DSO Observations
  7. GRB 090915: GROND upper limits
  8. Swift-BAT temporarily off-line for a few days
  9. Short-Duration GRB 090916: Skynet/PROMPT Observations
  10. GRB 090702: Skynet/GORT Observations
  11. GRB 090902B: Skynet/PROMPT Observations
  12. GRB 090916, Swift-BAT refined analysis
  13. GRB 090915 Swift-BAT detection of a burst in ground analysis
  14. GRB 090827: Confirmation of the X-ray afterglow
  15. GRB 090912, Swift-BAT refined analysis
  16. GRB 090910: Fermi GBM detection
  17. GRB 090814A: Skynet/DSO & GORT Observations
  18. GRB 090831A: Suzaku WAM observation of the prompt emission
  19. GRB 090902B: Suzaku WAM observation of the prompt emission
  20. GRB 090829A: Suzaku WAM observation of the prompt emission
  21. GRB 090904B: Fermi GBM detection
  22. GRB 090904B: Swift-BAT refined analysis
  23. GRB 090904A: Swift-BAT refined analysis
  24. GRB090904B: REM observations
  25. GRB 090904A: ROTSE-III Optical Limits
  26. GRB090902B: Swift XRT refined analysis
  27. GRB 090902B: Fermi LAT and GBM refined analysis.
  28. GRB 090902B: Optical afterglow candidate
  29. GRB 090902B: Swift/XRT Afterglow Candidate
  30. GRB 090902B: Fermi LAT detection
  31. GRB 090902B: Fermi GBM detection of a bright burst
  32. GRB 090902: Fermi GBM detection
  33. GRB 090831A: IPN Triangulation
  34. GRB 090831C BAT refined analysis
  35. GRB 090831C: GROND upper limits
  36. Konus-Wind observations of GRB 090831A
  37. Swift Trigger 361477, called GRB090831B, is probably not real.
  38. GRB 090829B: Fermi GBM Detection
  39. GRB 090831C: Swift detection of a burst
  40. GRB 090831B, RIMOTS optical upper limits
  41. GRB 090831: MAXI GSC detection
  42. GRB 090831: Fermi GBM detection
  43. GRB090829: Fermi GBM Detection
  44. Konus-Wind observations of GRB 090827
  45. GRB 090826: Fermi GBM detection
  46. GRB 090828: Fermi GBM detection
  47. GRB 090817 - TLS Observations
  48. Konus-Wind observations of GRB 090823
  49. GRB 090817: Swift/UVOT Observations of a Possible Late-Time Brightening
  50. GRB 090820: detection of a strong burst by RT-2 on board CORONAS PHOTON
  51. GRB 090820B: Fermi GBM detection
  52. GRB 090820: MASTER-Net optical polarization observations
  53. GRB 090820: Fermi GBM Detection of a bright burst.
  54. GRB 090817: aphotometry of USNO-B1.0 341-0096763
  55. GRB 090815C: Swift refined analysis
  56. GRB 090817: Fermi GBM observation
  57. GRB 090812: Konus-Wind and Swift/BAT joint spectral analysis
  58. GRB 090813: I-band observations from 1.5m OSN telescope
  59. GRB 090813: Suzaku WAM observation of the prompt emission
  60. GRB 090812: Suzaku WAM observation of the prompt emission
  61. GRB 090817: a long GRB localized by INTEGRAL
  62. GRB 090815B: Fermi GBM detection
  63. GRB 090815: Fermi GBM detection
  64. GRB 090814B: I-band observations from 1.23m CAHA telescope
  65. GRB 090814B: Liverpool Telescope Observations
  66. GRB 090814C: Fermi GBM detection
  67. GRB 090814B: Swift-XRT detection of a possible afterglow.
  68. GRB 090814A: Swift-XRT Team Refined Analysis
  69. GRB 090814A, RIMOTS optical upper limits
  70. GRB 090814A: Swift-BAT refined analysis
  71. GRB 090813: correction to GCN 9787
  72. GRB 090814B: a long GRB localized by INTEGRAL
  73. GRB 090813: Fermi GBM observation
  74. GRB 090813, Swift-BAT refined analysis
  75. Konus-Wind observations of GRB090813
  76. GRB 090813: Liverpool Telescope afterglow confirmation
  77. GRB 090812: WIRO NIR upper limit
  78. GRB 090812, RIMOTS optical upper limits
  79. GRB 090812 Swift-BAT Refined Analysis
  80. GRB090812: Swift/UVOT observations
  81. GRB 090812: Liverpool Telescope afterglow confirmation
  82. GRB 090812: P60 Confirmation of Optical Afterglow
  83. GRB 090807B: Fermi GBM detection
  84. GRB 090621B: MAGIC telescope GeV observation
  85. GRB 090621A: MAGIC telescope GeV observation
  86. GRB 090809B: Fermi GBM detection
  87. GRB 090809: Swift-BAT refined analysis
  88. GRB 090807: Liverpool Telescope observations
  89. GRB 090807: Swift-XRT refined analysis
  90. GRB 090807, Swift-BAT refined analysis
  91. GRB 090807, RIMOTS optical upper limits
  92. GRB 090802B: Fermi GBM detection
  93. IPN Triangulation and Konus-Wind observaions of GRB090727B
  94. GRB 090802: Fermi GBM detection
  95. Swift-BAT trigger 358760 is most likely not a GRB
  96. Swift trigger 358760 is probably a noise event
  97. GRB 090717A: Suzaku WAM observation of the prompt emission
  98. GRB 090709A : Quick look analysis of the Suzaku observation
  99. GRB 090728: Swift-BAT refined analysis
  100. GRB 090727: I-band observations from 1.23m CAHA

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