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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"

37264 results found.

  1. GRB 100805A: ROTSE-III Optical detection
  2. GRB 100805A: Swift/UVOT Observations of the Optical Afterglow
  3. GRB 100802A: WIYN observations
  4. GRB 100805A: IAC80 BVR-band observations
  5. Swift-BAT trigger 430975 is not a burst
  6. GRB 100805A: Swift-BAT refined analysis
  7. GRB 100805A: Swift-XRT Refined Analysis
  8. GRB 100805A: GRAS 002 optical observations
  9. GRB 100805A: I-band detection from 1.23m CAHA telescope.
  10. GRB 100805A: Enhanced Swift-XRT position
  11. GRB 100805A: Liverpool Telescope afterglow observations
  12. GRB 100805A: Further P60 Monitoring
  13. GRB 100805A: P60 Optical Afterglow Candidate
  14. GRB 100805A: Enhanced Swift-XRT position
  15. GRB 100805A: ROTSE-III Optical Limits
  16. GRB 100805A: Swift detection of a burst with an optical counterpart
  17. GRB 100802A: Fermi GBM observation
  18. GRB 100728B: optical photometry of ISON-NM
  19. GRB 100713A: second epoch Maidanak optical observation
  20. GRB 100713A: CrAO optical limits
  21. GRB 100802A: NOT optical observation
  22. GRB100802A: MITSuME optical upper limits
  23. GRB 100802A: P60 Observations
  24. GRB 100802A: XRT refined analysis
  25. GRB 100802A: Swift/UVOT Possible Optical Afterglow
  26. GRB 100728A: Suzaku WAM observation of the prompt emission
  27. GRB 100802A: Enhanced Swift-XRT position
  28. GRB 100802A: Swift-BAT refined analysis
  29. GRB 100802A: Liverpool Telescope observations
  30. GRB 100802A: ROTSE-III Optical Limits
  31. GRB 100802A: Possible Swift/UVOT Detection of Optical Afterglow
  32. GRB 100802A: Swift detection of a burst
  33. GRB 100725B: TELMA optical observation
  34. GRB 100728B: Swift/UVOT Observations (correction to GCN 11028)
  35. GRB 100728B: Swift/UVOT Observations (correction)
  36. GRB 100728B - NOT optical observation
  37. GRB 100728B: Swift/UVOT Observations
  38. GRB 100728B: Lick Observations
  39. GRB 100728B: Continued KAIT observations
  40. GRB 100728B, Swift-BAT refined analysis
  41. GRB 100728B: Swift-XRT Refined Analysis
  42. Konus-Wind observation of GRB 100728A
  43. GRB 100728A: GROND Detection of the NIR Afterglow Candidate
  44. GRB 100727A: Swift/UVOT Upper Limits
  45. GRB 100728A, Swift-BAT refined analysis
  46. GRB 100728B: Enhanced Swift-XRT position
  47. GRB 100728A: Swift/UVOT Upper Limits
  48. GRB 100728B: Fermi GBM observation
  49. GRB 100728A: Swift-XRT refined analysis
  50. GRB 100728B: GROND Detection of the NIR Afterglow
  51. GRB 100728B: optical detection
  52. GRB 100728B: Skynet/PROMPT Detections (correction)
  53. GRB 100728B: KAIT optical afterglow detection (correction)
  54. GRB 100728B: Swift detection of a burst with an optical counterpart
  55. GRB 100728A: Skynet/PROMPT Detections
  56. GRB 100728A: KAIT optical afterglow detection
  57. GRB 100728A: Fermi GBM observation
  58. GRB 100728A: Enhanced Swift-XRT position
  59. GRB 100728A: Swift detection of a burst
  60. GRB 100727A: Swift XRT refined analysis
  61. GRB 100727A: Fermi GBM observation
  62. GRB 100727A, Swift-BAT refined analysis
  63. GRB 100727A: Enhanced Swift-XRT position
  64. GRB 100727A: Swift detection of a burst
  65. GRB100725B: MITSuME optical upper limits
  66. GRB 100724B: AGILE/GRID analysis
  67. GRB 100724B: Suzaku WAM observation of the prompt emission
  68. GRB 100724B: gamma-ray detection by AGILE
  69. GRB 100725B: Swift-BAT refined analysis
  70. GRB 100725B: refined XRT analysis
  71. GRB 100725A: GROND upper limits
  72. GRB 100725B: Swift/UVOT Upper Limits
  73. GRB 100725A: Swift/UVOT Upper Limits
  74. GRB 100725A: Swift-BAT refined analysis
  75. GRB 100725A: Swift XRT refined analysis
  76. GRB 100725B: Enhanced Swift-XRT position
  77. GRB 100725A: Enhanced Swift-XRT position
  78. GRB 100725B: Swift detection of a burst
  79. Konus-Wind observation of GRB 100724B
  80. GRB 100725A: Prompt enhanced Swift-XRT position
  81. GRB 100725A: Swift detection of a burst
  82. GRB 100724B: Fermi LAT and GBM analysis
  83. GRB 100724B: Fermi GBM detection
  84. GRB 100724A: Swift/BAT spectral lag results
  85. GRB 100724A: Swift XRT refined analysis
  86. GRB 100724A: Enhanced Swift-XRT position
  87. GRB 100724A: Swift/UVOT observations
  88. GRB 100724A: Swift-BAT refined analysis
  89. GRB 100724A: X-shooter redshift
  90. GRB 100724A: fading afterglow seen with GROND
  91. GRB 100724A, GROND detection of an afterglow candidate
  92. GRB 100724A: Swift detection of a burst
  93. GRB 100614A: 10.4-m GTC deep-optical limit
  94. GRB 100722A: Fermi GBM detection
  95. GRB 100718A: MASTER-Net optical prompt and alert observations
  96. GRB 100719A: Swift-BAT refined analysis
  97. GRB 100719A: Swift detection of a burst
  98. GRB 100713A: optical observation in Maidanak
  99. GRB 100713A: further inspection of TNG images
  100. GRB 100713A: Swift XRT refined analysis

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