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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"

19662 results found.

  1. GRB 080319B: ROTSE-III Observations of Optical Counterpart
  2. GRB 080319B: optical observations
  3. Swift-BAT trigger 306829 is IGR J16479-4514
  4. GRB 080319B: RAPTOR observations of a naked eye burst
  5. GRB 080319A: Swift-XRT Team Refined Analysis
  6. GRB 080319B, Swift-BAT refined analysis
  7. GRB 080319C: Swift-XRT Team Refined Analysis
  8. GRB 080319B: Swift-XRT Team Refined Analysis
  9. GRB 080319D: Swift/UVOT Refined Analysis of the Fading Optical Afterglow Candidate
  10. GRB 080319C: AGILE-MCAL observation of the prompt emission
  11. GRB 080319D: MASTER-VWF-Kislovodsk optical observation
  12. GRB 080319C: MASTER-VWF-Kislovodsk optical observation
  13. GRB 080319D: Swift detection of a burst with a possible optical afterglow
  14. GRB 080319B: TORTORA synchronous observation
  15. GRB 080319A/B/C: INTEGRAL SPI-ACS light curves available
  16. GRB 080319B: Enhanced Swift-XRT position
  17. GRB 080319A: Enhanced Swift-XRT position
  18. GRB 080319A, Swift-BAT refined analysis
  19. GRB 080319C: Early Super-LOTIS Observations
  20. GRB 080319C: Swift detection of a burst with an optical afterglow
  21. GRB 080319C: KAIT OA candidate
  22. GRB 080319b prompt optical observation by Pi-of-the-Sky
  23. GRB 080319B: Gemini-South Spectroscopy
  24. GRB080319B Liverpool Telescope optical afterglow candidate
  25. GRB 080319B: Super-LOTIS Detection of a Bright OT
  26. GRB 080319B: KAIT OA
  27. GRB 080319B: UVOT Position
  28. GRB 080319B: Swift detection of an intense burst with a bright optical counterpart
  29. GRB 080319A: Swift detection of a burst
  30. Swift Trigger 306745 is not a GRB
  31. Swift Trigger 306616 is not a GRB
  32. Swift/UVOT observations of GRB 080315
  33. Swift trigger 306323: Swift-BAT/XRT refined analysis
  34. SAX J1818.6-1703: Swift detection (trigger 306379)
  35. GRB 080315: TAROT Calern observatory optical observations
  36. GRB 080315: Swift detection of a possible burst
  37. GRB 080310: ROTSE-III Observations of Optical Counterpart
  38. GRB 080310, Swift-BAT refined analysis
  39. GRB 080310: Swift-XRT refined analysis
  40. GRB 080310: Swift/UVOT Refined Analysis
  41. GRB 080310 - SDSS Pre-Burst Observations
  42. GRB 080310: Enhanced Swift-XRT position
  43. GRB 080310: VLT/UVES spectroscopy
  44. GRB080310: Super-LOTIS suggestion of brightening
  45. GRB 080310: Swift detection of a burst with optical afterglow
  46. GRB080229, optical upper limit (Correction)
  47. GRB080307, optical upper limit
  48. GRB080229, optical upper limit
  49. GRB 080307: Swift-XRT Team refined analysis
  50. GRB 080307: Swift/UVOT Upper Limits
  51. GRB 080307: Early RAPTOR Limits
  52. GRB 080307, Swift-BAT refined analysis
  53. GRB080307 - SDSS Pre-Burst Observations
  54. GRB 080307: retraction of UVOT candidate
  55. GRB 080307: Enhanced Swift-XRT position
  56. GRB 080307, Preliminary Swift-BAT refined analysis
  57. GRB 080307: Swift detection of a burst
  58. VLA possible radio detection of GRB 080229
  59. GRB 080303: Swift/UVOT follow-up of afterglow detection
  60. GRB 080303, Swift-BAT refined analysis
  61. GRB080303: Swift XRT refined analysis
  62. GRB 080303: Enhanced Swift-XRT position
  63. Swift UVOT observations of GRB080229B
  64. GRB080229B: Swift XRT afterglow observation
  65. GRB 080303A: Faulkes Telescope South optical afterglow observations
  66. GRB 080303: Swift detection of a burst with optical afterglow
  67. GRB 080303A: ROTSE-III Optical Limits
  68. GRB 080229: I-band observations from OSN
  69. GRB080229: Swift XRT refined analysis
  70. GRB 080229: Enhanced Swift-XRT position
  71. UVOT analysis for GRB080229
  72. GRB 080229, Swift-BAT refined analysis
  73. GRB 080229: Faulkes Telescope South optical limit
  74. GRB 080229A: ROTSE-III Optical Limits
  75. GRB 080229: Swift detection of a bright burst
  76. Swift-XRT improved positions, and new redshift limits.
  77. ESO optical and NIR observations of GRB 080218B
  78. GRB 080204: Suzaku WAM observation of the prompt emission
  79. GRB 080218B, Swift-BAT refined analysis
  80. GRB 080218B: Swift-XRT refined analysis
  81. Swift/UVOT observations of GRB080218B
  82. GRB 080218B: Enhanced Swift-XRT position
  83. GRB 080218B: GROND upper limits
  84. GRB 080218A, Swift-BAT refined analysis
  85. GRB080218B: Watcher prompt limit
  86. GRB 080218B: Swift detection of a burst
  87. GRB 080218: Swift detection of a burst
  88. Swift-XRT and UVOT observations of the IPN burst GRB 080211
  89. VLA radio upper limit on GRB 080212
  90. Swift/UVOT refined analysis of GRB080212
  91. GRB 080212, Swift-BAT refined analysis
  92. GRB 080212: GROND detects afterglow
  93. GRB 080212: optical observations
  94. GRB 080212: Enhanced Swift-XRT position
  95. GRB 080212: Swift-XRT Team refined analysis
  96. GRB 080210: Keck photometry
  97. VLA non-detection of GRB 080210
  98. GRB 080212: Swift detection of a burst
  99. GRB 080210: Swift/UVOT Refined Analysis
  100. GRB 080210, Swift-BAT refined analysis

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