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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"

29094 results found.

  1. GRB 080310: early RAPTOR multicolor observations
  2. GRB 080310, Swift-BAT refined analysis
  3. GRB 080310: Swift-XRT refined analysis
  4. GRB 080310: Swift/UVOT Refined Analysis
  5. GRB 080310 - SDSS Pre-Burst Observations
  6. GRB 080310: VLT/UVES spectroscopy
  7. GRB080310: Super-LOTIS suggestion of brightening
  8. GRB 080310: Swift detection of a burst with optical afterglow
  9. GRB080229, optical upper limit (Correction)
  10. GRB080307, optical upper limit
  11. GRB080229, optical upper limit
  12. GRB 080307: Swift-XRT Team refined analysis
  13. GRB 080307: Swift/UVOT Upper Limits
  14. GRB 080307: Early RAPTOR Limits
  15. GRB 080307, Swift-BAT refined analysis
  16. GRB080307 - SDSS Pre-Burst Observations
  17. GRB 080307, Preliminary Swift-BAT refined analysis
  18. GRB 080307: Swift detection of a burst
  19. GRB 080303: Swift/UVOT follow-up of afterglow detection
  20. GRB 080303, Swift-BAT refined analysis
  21. GRB080303: Swift XRT refined analysis
  22. Swift UVOT observations of GRB080229B
  23. GRB080229B: Swift XRT afterglow observation
  24. GRB 080303A: Faulkes Telescope South optical afterglow observations
  25. GRB 080303: Swift detection of a burst with optical afterglow
  26. GRB 080303A: ROTSE-III Optical Limits
  27. GRB080229: Swift XRT refined analysis
  28. GRB080229: Possible optical afterglow
  29. UVOT analysis for GRB080229
  30. GRB 080229, Swift-BAT refined analysis
  31. GRB 080229: Faulkes Telescope South optical limit
  32. GRB 080229A: ROTSE-III Optical Limits
  33. GRB 080229: Swift detection of a bright burst
  34. Swift-XRT improved positions, and new redshift limits.
  35. GRB 080218B, Swift-BAT refined analysis
  36. GRB 080218B: Swift-XRT refined analysis
  37. Swift/UVOT observations of GRB080218B
  38. GRB 080218B: GROND upper limits
  39. GRB 080218A, Swift-BAT refined analysis
  40. GRB 080218B: Swift detection of a burst
  41. GRB 080218: Swift detection of a burst
  42. Swift-XRT and UVOT observations of the IPN burst GRB 080211
  43. Swift/UVOT refined analysis of GRB080212
  44. GRB 080212, Swift-BAT refined analysis
  45. GRB080212: Optical afterglow candidate observed by MITSuME Telescope
  46. GRB 080212: GROND detects afterglow
  47. GRB 080212: optical observations
  48. GRB 080212: Swift-XRT Team refined analysis
  49. GRB 080210: Keck photometry
  50. GRB 080212: Swift detection of a burst
  51. GRB 080212: DSS/2MASS Galaxy at XRT position
  52. GRB 080210: Swift/UVOT Refined Analysis
  53. GRB 080210, Swift-BAT refined analysis
  54. GRB 080210: Super-LOTIS observations
  55. GRB 080210: Swift-XRT Refined Analysis
  56. GRB 080210: Rapid PROMPT Detections
  57. GRB 080210: GOND detection in all bands and redshift upper limit
  58. GRB080210 - SDSS Pre-Burst Observations
  59. GRB 080210: Swift detection of a burst with optical afterglow
  60. GRB 080210: TAROT La Silla observatory optical detection
  61. GRB 080207, Swift-BAT refined analysis
  62. GRB 080207: Optical limits from Gemini-South
  63. Swift detection of AX J1749.1-2639
  64. GRB 080207: Super-LOTIS observations
  65. GRB 080207, Swift-BAT refined analysis
  66. Swift Trigger 302777 is not a GRB
  67. GRB080207: RTT150 Optical Observations
  68. GRB080207: Swift/UVOT refined analysis
  69. GRB 080207: TAROT Calern observatory optical observations
  70. GRB 080207: Swift detection of a burst
  71. GRB 080205, Swift-BAT refined analysis
  72. GRB 080205: Swift XRT refined analysis
  73. GRB 080205: OA evolution from KAIT observations
  74. GRB 080205: Swift/UVOT observations
  75. GRB 080205: KAIT OA detection
  76. GRB 080205: Swift detection of a burst
  77. Swift-BAT Trigger #302454, correction of GCN notice, update on AX J1749.1-2639
  78. GRB 080129: Swift/UVOT Refined Upper Limits
  79. GRB 080129: Swift-XRT refined analysis
  80. GRB 080129: KAIT optical limits
  81. GRB 080123: Early afterglow detection with BATSS (BAT Slew Survey)
  82. GRB 080129: optical limit by Pi of the Sky
  83. GRB 080129, Swift-BAT refined analysis
  84. GRB 080129: TAROT La Silla observatory optical observations
  85. GRB 080129: Swift XRT position
  86. GRB 080129 (?): UVOT Upper Limits
  87. GRB 080129 (?): Swift detection of a possible burst
  88. A new website of high-level data products for Swift GRBs
  89. GRB 080121: Upper limit on X-ray afterglow
  90. GRB 080123 : Suzaku WAM observation of the prompt emission
  91. Swift trigger(=301779) is not a GRB
  92. GRB 080121: Swift/UVOT upper limits
  93. Two non-burst Swift SubThreshold triggers
  94. GRB 080121: Swift-BAT detection of a very weak, short burst
  95. GRB 080123: Swift/UVOT refined analysis
  96. GRB 080123, Swift-BAT refined analysis
  97. GRB 080123: Swift detection of a short burst
  98. GRB 080120: Swift-XRT refined analysis
  99. UVOT detection of GRB080120
  100. Gemini-South observations of XRF 080109 / SN 2008D

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