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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"

19615 results found.

  1. GRB 080307: Swift/UVOT Upper Limits
  2. GRB 080307: Early RAPTOR Limits
  3. GRB 080307, Swift-BAT refined analysis
  4. GRB080307 - SDSS Pre-Burst Observations
  5. GRB 080307: retraction of UVOT candidate
  6. GRB 080307: Enhanced Swift-XRT position
  7. GRB 080307, Preliminary Swift-BAT refined analysis
  8. GRB 080307: Swift detection of a burst
  9. VLA possible radio detection of GRB 080229
  10. GRB 080303: Swift/UVOT follow-up of afterglow detection
  11. GRB 080303, Swift-BAT refined analysis
  12. GRB080303: Swift XRT refined analysis
  13. GRB 080303: Enhanced Swift-XRT position
  14. Swift UVOT observations of GRB080229B
  15. GRB080229B: Swift XRT afterglow observation
  16. GRB 080303A: Faulkes Telescope South optical afterglow observations
  17. GRB 080303: Swift detection of a burst with optical afterglow
  18. GRB 080303A: ROTSE-III Optical Limits
  19. GRB 080229: I-band observations from OSN
  20. GRB080229: Swift XRT refined analysis
  21. GRB 080229: Enhanced Swift-XRT position
  22. UVOT analysis for GRB080229
  23. GRB 080229, Swift-BAT refined analysis
  24. GRB 080229: Faulkes Telescope South optical limit
  25. GRB 080229A: ROTSE-III Optical Limits
  26. GRB 080229: Swift detection of a bright burst
  27. Swift-XRT improved positions, and new redshift limits.
  28. ESO optical and NIR observations of GRB 080218B
  29. GRB 080204: Suzaku WAM observation of the prompt emission
  30. GRB 080218B, Swift-BAT refined analysis
  31. GRB 080218B: Swift-XRT refined analysis
  32. Swift/UVOT observations of GRB080218B
  33. GRB 080218B: Enhanced Swift-XRT position
  34. GRB 080218B: GROND upper limits
  35. GRB 080218A, Swift-BAT refined analysis
  36. GRB080218B: Watcher prompt limit
  37. GRB 080218B: Swift detection of a burst
  38. GRB 080218: Swift detection of a burst
  39. Swift-XRT and UVOT observations of the IPN burst GRB 080211
  40. VLA radio upper limit on GRB 080212
  41. Swift/UVOT refined analysis of GRB080212
  42. GRB 080212, Swift-BAT refined analysis
  43. GRB 080212: GROND detects afterglow
  44. GRB 080212: optical observations
  45. GRB 080212: Enhanced Swift-XRT position
  46. GRB 080212: Swift-XRT Team refined analysis
  47. GRB 080210: Keck photometry
  48. VLA non-detection of GRB 080210
  49. GRB 080212: Swift detection of a burst
  50. GRB 080210: Swift/UVOT Refined Analysis
  51. GRB 080210, Swift-BAT refined analysis
  52. GRB 080210: Super-LOTIS observations
  53. GRB 080210: Swift-XRT Refined Analysis
  54. GRB 080210: Enhanced Swift-XRT position
  55. GRB 080210: GOND detection in all bands and redshift upper limit
  56. GRB080210 - SDSS Pre-Burst Observations
  57. GRB 080210: Swift detection of a burst with optical afterglow
  58. GRB 080210: TAROT La Silla observatory optical detection
  59. GRB 080207: GROND upper limits
  60. GRB 080207, Swift-BAT refined analysis
  61. Swift detection of AX J1749.1-2639
  62. GRB 080207, Swift-BAT refined analysis
  63. Swift Trigger 302777 is not a GRB
  64. GRB080207: Swift/UVOT refined analysis
  65. GRB 080207: TAROT Calern observatory optical observations
  66. GRB 080207: Swift-XRT Refined Analysis
  67. GRB 080207: Enhanced Swift-XRT position
  68. GRB 080207: Swift detection of a burst
  69. GRB 080205 optical upper limit
  70. VLA radio upper limit on GRB 080205
  71. GRB 080205, Swift-BAT refined analysis
  72. IPN localization of very hard GRB 080204
  73. GRB 080205: Swift XRT refined analysis
  74. GRB 080205: OA evolution from KAIT observations
  75. GRB 080205: Swift/UVOT observations
  76. GRB 080205: Enhanced Swift-XRT position
  77. GRB 080205: KAIT OA detection
  78. GRB 080205: Swift detection of a burst
  79. Swift-BAT Trigger #302454, correction of GCN notice, update on AX J1749.1-2639
  80. GRB 080130: Swift-BAT refined analysis
  81. GRB 080130: further Swift XRT observations confirm fading source
  82. GRB 080129: Swift/UVOT Refined Upper Limits
  83. Swift/UVOT observations of GRB080130
  84. GRB 080130(?): Swift XRT observation
  85. GRB 080129: Swift-XRT refined analysis
  86. GRB 080129: KAIT optical limits
  87. GRB 080129, Swift-BAT refined analysis
  88. GRB 080129: TAROT La Silla observatory optical observations
  89. GRB 080129: Gemini-South photometry
  90. GRB 080129: GROND detection in all bands, and fading
  91. GRB 080129: GROND detection of the optical/NIR afterglow, and fading
  92. GRB 080129: Enhanced Swift-XRT position
  93. GRB 080129: Swift XRT position
  94. GRB 080129 (?): UVOT Upper Limits
  95. GRB 080129 (?): Swift detection of a possible burst
  96. A new website of high-level data products for Swift GRBs
  97. GRB 080121: Upper limit on X-ray afterglow
  98. GRB 080123 : Suzaku WAM observation of the prompt emission
  99. Swift trigger(=301779) is not a GRB
  100. GRB 080121: Swift/UVOT upper limits

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