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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"

20996 results found.

  1. GRB 090807: Skynet/DSO Observations
  2. GRB 090915: GROND upper limits
  3. Short-Duration GRB 090916: Skynet/PROMPT Observations
  4. GRB 090915: SARA detection of afterglow candidate
  5. GRB 090915: Swift/UVOT detection of an optical afterglow candidate
  6. GRB 090702: Skynet/GORT Observations
  7. GRB 090902B: Skynet/PROMPT Observations
  8. GRB 090912: Swift/UVOT Upper Limits
  9. GRB 090912 optical upper limit
  10. GRB 090814A: Skynet/DSO & GORT Observations
  11. GRB 090904B: GROND detection of the optical afterglow
  12. GRB 090904A: Swift/UVOT Refined Analysis
  13. GRB 090904B: Swift/UVOT Refined Analysis
  14. GRB 090902B: VLA radio detection
  15. GRB 090904A: NOT observations
  16. GRB 090902B: WSRT Radio Observation
  17. GRB090904B: REM observations
  18. GRB 090904: Swift detection of a burst
  19. GRB 090902B: Swift/UVOT refined analysis
  20. GRB 090902B: Faulkes Telescope North observations
  21. GRB 090902B: GROND NIR Afterglow Observations
  22. GRB 090902B: Optical afterglow candidate
  23. GRB090902B: Swift/UVOT observations
  24. GRB 090902B: Swift/XRT Afterglow Candidate
  25. GRB 090831C: GROND upper limits
  26. Konus-Wind observations of GRB 090831A
  27. GRB090831C: Swift/UVOT upper limits
  28. Konus-Wind observations of GRB 090827
  29. GRB 090827: Swift XRT and UVOT observations
  30. GRB 090817 - TLS Observations
  31. GRB 090823: Swift XRT possible detection of the X-ray afterglow
  32. GRB 090817: No host galaxy, no supernova
  33. Konus-Wind observations of GRB 090823
  34. GRB 090817: Swift/UVOT Observations of a Possible Late-Time Brightening
  35. GRB 090817: Swift/UVOT Observations of a Host Galaxy Candidate
  36. GRB 090820: MASTER-Net optical polarization observations
  37. GRB 090820: Fermi GBM Detection of a bright burst.
  38. GRB 090817: aphotometry of USNO-B1.0 341-0096763
  39. GRB 090817: Liverpool Telescope Observations
  40. GRB 090817: optical upper limit
  41. GRB 090817: Swift/UVOT Upper Limits
  42. GRB 090813: I-band observations from 1.5m OSN telescope
  43. GRB 090817: Swift-XRT observations
  44. GRB 090814A: optical observations
  45. VLA radio non-detection of GRB 090812
  46. GRB 090813: CrAO optical obsevations
  47. GRB 090814B: I-band observations from 1.23m CAHA telescope
  48. GRB 090814B: Liverpool Telescope Observations
  49. GRB 090814A: Swift/UVOT Observations
  50. GRB 090814: GROND Detection of an Optical Afterglow Candidate
  51. Konus-Wind observations of GRB090813
  52. GRB090813: Swift/UVOT upper limits
  53. GRB 090813: Liverpool Telescope afterglow confirmation
  54. GRB 090813: P60 Optical Afterglow Confirmation
  55. GRB 090813: optical candidate from 1.23m CAHA telescope
  56. GRB 090812: Faulkes Telescope South Continued Optical Monitoring
  57. GRB 090812: RAPTOR detections during the burst
  58. GRB090812: Swift/UVOT observations
  59. GRB 090812: GROND Observations of the Optical/NIR Afterglow
  60. GRB 090812: P60 Confirmation of Optical Afterglow
  61. GRB 090809: Further NOT optical observations
  62. GRB 090621B: MAGIC telescope GeV observation
  63. GRB 090621A: MAGIC telescope GeV observation
  64. GRB 090809: WHT observations
  65. GRB090809: Swift/UVOT observations
  66. GRB 090809: afterglow confirmation at the NOT
  67. GRB 090807: Liverpool Telescope observations
  68. GRB 090807: Swift/UVOT Upper Limits
  69. GRB 090709A : Quick look analysis of the Suzaku observation
  70. GRB 090727: optical observations
  71. GRB 090727: Swift/UVOT Upper Limits
  72. GRB 090728: Swift/UVOT Upper Limits
  73. GRB 090727: I-band observations from 1.23m CAHA
  74. GRB 090727: Liverpool Telescope Afterglow Confirmation and Optical Flare
  75. GRB 090715B: Late-time Lick 3m observations
  76. GRB090726: Swift/UVOT observations
  77. GRB 090726: D50 optical observations
  78. Konus-Wind and Konus-RF observations of GRB 090719
  79. Konus-RF and Konus-Wind observations of GRB 090718B
  80. Konus-Wind observations of bright hard GRB 090720B
  81. GRB 090720: Gemini-North Imaging and Optical Afterglow
  82. Swift XRT and UVOT refned analysis of GRB 090720
  83. GRB 090709A: Swift XRT Timing Analysis
  84. GRB 090715B: further NOT optical observations
  85. GRB 090709A - CARMA mm Observations
  86. GRB 090715B: Lick observations
  87. GRB 090715A: VLA observations
  88. Konus-Wind observations of short/hard GRB 090715A
  89. Konus-Wind and Konus-RF observations of GRB 090715B
  90. GRB 090715B: Swift/UVOT followup observations
  91. GRB 090715B: break in the optical afterglow decay
  92. GRB 090715B: Observation of the optical afterglow
  93. GRB 090715B: NOT optical observations
  94. GRB 090715B - Liverpool Telescope Optical Afterglow Candidate
  95. GRB 090709A: Xinglong TNT optical upper limit
  96. VLA radio observations of GRB 090709A
  97. GRB 090621B: MTM-500 optical observations
  98. GRB 090709A: deep optical observation with the 10.4m GTC
  99. GRB090709A : WSRT Radio observation
  100. GRB 090709A: WHT LIRIS observations

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