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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"

24435 results found.

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

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