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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"

27126 results found.

  1. GRB 080319D: Swift detection of a burst with a possible optical afterglow
  2. GRB 080319A, Swift-BAT refined analysis
  3. GRB 080319C: Early Super-LOTIS Observations
  4. GRB 080319C: Swift detection of a burst with an optical afterglow
  5. GRB 080319C: KAIT OA candidate
  6. GRB 080319B: Change in power law decay index
  7. GRB 080319B: Gemini-South Spectroscopy
  8. GRB080319B Liverpool Telescope optical afterglow candidate
  9. GRB 080319B: Super-LOTIS Detection of a Bright OT
  10. GRB 080319B: KAIT OA
  11. GRB 080319B: Swift detection of an intense burst with a bright optical counterpart
  12. GRB 080319A: Swift detection of a burst
  13. Swift Trigger 306745 is not a GRB
  14. Swift Trigger 306616 is not a GRB
  15. Swift/UVOT observations of GRB 080315
  16. Swift trigger 306323: Swift-BAT/XRT refined analysis
  17. SAX J1818.6-1703: Swift detection (trigger 306379)
  18. GRB 080315: TAROT Calern observatory optical observations
  19. GRB 080315: Swift detection of a possible burst
  20. GRB 080310: ROTSE-III Observations of Optical Counterpart
  21. GRB080310: Optical observation by MITSuME telescope
  22. GRB 080310: early RAPTOR multicolor observations
  23. GRB 080310, Swift-BAT refined analysis
  24. GRB 080310: Swift-XRT refined analysis
  25. GRB 080310: Swift/UVOT Refined Analysis
  26. GRB 080310 - SDSS Pre-Burst Observations
  27. GRB 080310: VLT/UVES spectroscopy
  28. GRB080310: Super-LOTIS suggestion of brightening
  29. GRB 080310: Swift detection of a burst with optical afterglow
  30. GRB080229, optical upper limit (Correction)
  31. GRB080307, optical upper limit
  32. GRB080229, optical upper limit
  33. GRB 080307: Swift-XRT Team refined analysis
  34. GRB 080307: Swift/UVOT Upper Limits
  35. GRB 080307: Early RAPTOR Limits
  36. GRB 080307, Swift-BAT refined analysis
  37. GRB080307 - SDSS Pre-Burst Observations
  38. GRB 080307, Preliminary Swift-BAT refined analysis
  39. GRB 080307: Swift detection of a burst
  40. GRB 080303: Swift/UVOT follow-up of afterglow detection
  41. GRB 080303, Swift-BAT refined analysis
  42. GRB080303: Swift XRT refined analysis
  43. Swift UVOT observations of GRB080229B
  44. GRB080229B: Swift XRT afterglow observation
  45. GRB 080303A: Faulkes Telescope South optical afterglow observations
  46. GRB 080303: Swift detection of a burst with optical afterglow
  47. GRB 080303A: ROTSE-III Optical Limits
  48. GRB080229: Swift XRT refined analysis
  49. GRB080229: Possible optical afterglow
  50. UVOT analysis for GRB080229
  51. GRB 080229, Swift-BAT refined analysis
  52. GRB 080229: Faulkes Telescope South optical limit
  53. GRB 080229A: ROTSE-III Optical Limits
  54. GRB 080229: Swift detection of a bright burst
  55. Swift-XRT improved positions, and new redshift limits.
  56. GRB 080204: Suzaku WAM observation of the prompt emission
  57. GRB 080218B, Swift-BAT refined analysis
  58. GRB 080218B: Swift-XRT refined analysis
  59. Swift/UVOT observations of GRB080218B
  60. GRB 080218B: GROND upper limits
  61. GRB 080218A, Swift-BAT refined analysis
  62. GRB 080211: Suzaku WAM observation of the prompt emission
  63. GRB 080218B: Swift detection of a burst
  64. GRB 080218: Swift detection of a burst
  65. Swift-XRT and UVOT observations of the IPN burst GRB 080211
  66. Swift/UVOT refined analysis of GRB080212
  67. GRB 080212, Swift-BAT refined analysis
  68. GRB080212: Optical afterglow candidate observed by MITSuME Telescope
  69. GRB 080212: GROND detects afterglow
  70. GRB 080212: optical observations
  71. GRB 080212: Swift-XRT Team refined analysis
  72. GRB 080210: Keck photometry
  73. GRB 080212: Swift detection of a burst
  74. GRB 080212: DSS/2MASS Galaxy at XRT position
  75. GRB 080210: Swift/UVOT Refined Analysis
  76. GRB 080210, Swift-BAT refined analysis
  77. GRB 080210: Super-LOTIS observations
  78. GRB 080210: Swift-XRT Refined Analysis
  79. GRB 080210: Rapid PROMPT Detections
  80. GRB 080210: GOND detection in all bands and redshift upper limit
  81. GRB080210 - SDSS Pre-Burst Observations
  82. GRB 080210: Swift detection of a burst with optical afterglow
  83. GRB 080210: TAROT La Silla observatory optical detection
  84. GRB 080207, Swift-BAT refined analysis
  85. GRB 080207: Optical limits from Gemini-South
  86. Swift detection of AX J1749.1-2639
  87. GRB 080207: Super-LOTIS observations
  88. GRB 080207, Swift-BAT refined analysis
  89. Swift Trigger 302777 is not a GRB
  90. GRB080207: RTT150 Optical Observations
  91. GRB080207: Swift/UVOT refined analysis
  92. GRB 080207: TAROT Calern observatory optical observations
  93. GRB 080207: Swift detection of a burst
  94. GRB 080205, Swift-BAT refined analysis
  95. GRB 080205: Swift XRT refined analysis
  96. GRB 080205: OA evolution from KAIT observations
  97. GRB 080205: Swift/UVOT observations
  98. GRB 080205: KAIT OA detection
  99. GRB 080205: Swift detection of a burst
  100. Swift-BAT Trigger #302454, correction of GCN notice, update on AX J1749.1-2639

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