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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"

24441 results found.

  1. GRB100816A: TNG optical afterglow confirmation.
  2. GRB 100816A: ROTSE-III Optical Limits
  3. GRB 100816A: Swift detection of a possibly short burst with optical afterglow
  4. GRB 100814A: Fermi GBM observation
  5. GRB 100814A, Swift-BAT refined analysis
  6. GRB 100814A: CQUEAN r- and i-band Observation
  7. GRB 100814A: ROTSE-III Detection of Optical Counterpart
  8. Swift-BAT trigger 431582 likely is IGR J17464-2811
  9. GRB 100805A: the 4-th epoch of SAO RAS optical observations
  10. GRB 100805A: optical observation in CrAO (correction to the GCN 11077 and second epoch)
  11. GRB 100802A: further NOT observation
  12. GRB 100805A: Swift/UVOT Observations of a Possible Late-Time Brightening
  13. GRB100807A: MITSuME optical upper limits
  14. GRB 100807A: Swift-BAT refined analysis
  15. GRB 100807A: ROTSE-III Optical Limits
  16. GRB 100805A: Xinglong TNT optical observation
  17. GRB 100805A: IAC80 BVR-band observations
  18. GRB 100805A: Swift-BAT refined analysis
  19. Trigger 430975: Swift detection of a possible burst
  20. GRB 100805A: I-band detection from 1.23m CAHA telescope.
  21. GRB 100805A: P60 Optical Afterglow Candidate
  22. GRB 100805A: ROTSE-III Optical Limits
  23. GRB 100802A: Fermi GBM observation
  24. GRB100802A: MITSuME optical upper limits
  25. GRB 100728A: Suzaku WAM observation of the prompt emission
  26. GRB 100802A: Swift-BAT refined analysis
  27. GRB 100802A: Liverpool Telescope observations
  28. GRB 100802A: ROTSE-III Optical Limits
  29. GRB 100728B - NOT optical observation
  30. GRB 100728B: Continued KAIT observations
  31. GRB 100728B, Swift-BAT refined analysis
  32. Konus-Wind observation of GRB 100728A
  33. GRB 100728A, Swift-BAT refined analysis
  34. GRB 100728B: Fermi GBM observation
  35. GRB 100728A: Skynet/PROMPT Detections
  36. GRB 100728A: Fermi GBM observation
  37. GRB 100727A: Fermi GBM observation
  38. GRB 100727A, Swift-BAT refined analysis
  39. GRB 100727A: Swift detection of a burst
  40. GRB100725B: MITSuME optical upper limits
  41. GRB 100724B: AGILE/GRID analysis
  42. GRB 100724B: Suzaku WAM observation of the prompt emission
  43. GRB 100724B: gamma-ray detection by AGILE
  44. GRB 100725B: Swift-BAT refined analysis
  45. GRB 100725A: GROND upper limits
  46. GRB 100725A: Swift-BAT refined analysis
  47. GRB100725B: Faulkes Telescope North observations
  48. GRB 100725B: Swift detection of a burst
  49. Konus-Wind observation of GRB 100724B
  50. GRB 100725A: Swift detection of a burst
  51. GRB 100724B: Fermi LAT and GBM analysis
  52. GRB 100724B: Fermi GBM detection
  53. GRB 100724A: Swift-BAT refined analysis
  54. GRB 100724A: Swift detection of a burst
  55. GRB 100614A: 10.4-m GTC deep-optical limit
  56. GRB 100722A: Fermi GBM detection
  57. GRB 100719A: Swift-BAT refined analysis
  58. GRB 100713A: optical observation in Maidanak
  59. GRB 100713A: GROND upper limits
  60. GRB 100713A: optical upper limit
  61. GRB 100713A: TNG optical observations
  62. GRB100713A: Swift X-ray afterglow detection
  63. GRB 100713A: a long GRB detected by INTEGRAL
  64. GRB 100707A: Suzaku WAM observation of the prompt emission
  65. Konus-Wind observation of GRB 100707A
  66. GRB 100707A: Fermi GBM detection
  67. GRB 100628A: Swift XRT/UVOT refined analysis
  68. Tentative redshift of GRB100704A from Swift-XRT data
  69. Konus-Wind observation of GRB 100701B
  70. Konus-Wind observation of GRB 100704A
  71. GRB 100703A: a short GRB detected by INTEGRAL
  72. GRB 100704A: Fermi GBM observation
  73. GRB 100704A: Swift-BAT refined analysis
  74. GRB 100615A: Additional Gemini/NIRI observations
  75. GRB 100526A: Gemini/NIRI afterglow confirmation and host galaxy
  76. GRB 100702A, Swift-BAT refined analysis
  77. GRB 100701B: Fermi GBM detection
  78. GRB 100702A: VLT optical observations
  79. GRB 100702: ROTSE-III Optical Limits
  80. GRB 100615A: Chandra X-ray ToO Observation
  81. GRB 100213B: Detection of Fading Optical Afterglow
  82. GRB 100625A: Fermi GBM detection
  83. GRB 100628A: GROND optical/NIR observations of the host candidate
  84. GRB 100628A: Gemini North Observations
  85. GRB 100628A: Swift XRT refined position
  86. GRB100625A: GROND confirmation of constant source
  87. GRB 090709A: Host galaxy detection
  88. GRB 100628A: Swift XRT detection of a possible X-ray afterglow
  89. GRB 100628A: Swift-BAT refined analysis
  90. GRB 100628A: Swift detection of a short hard burst
  91. GRB 100625A: Swift-BAT refined analysis
  92. Konus-Wind observation of GRB 100625A
  93. GRB 100625A: Gemini candidate afterglow
  94. GRB 100625A: Swift detection of a short hard burst
  95. GRB 100418A: late time optical observations
  96. Konus-Wind observation of GRB 100621A
  97. GRB 100621A: IRSF/SIRIUS NIR Observation
  98. GRB 100619A: Correction to the Fermi GBM trigger time
  99. GRB 100621A: Swift-BAT refined analysis
  100. GRB 100621A: GROND observation of bright NIR afterglow

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