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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"

19666 results found.

  1. VLA non-detection of GRB 080210
  2. GRB 080212: Swift detection of a burst
  3. GRB 080210: Swift/UVOT Refined Analysis
  4. GRB 080210, Swift-BAT refined analysis
  5. GRB 080210: Super-LOTIS observations
  6. GRB 080210: Swift-XRT Refined Analysis
  7. GRB 080210: Enhanced Swift-XRT position
  8. GRB 080210: GOND detection in all bands and redshift upper limit
  9. GRB080210 - SDSS Pre-Burst Observations
  10. GRB 080210: Swift detection of a burst with optical afterglow
  11. GRB 080210: TAROT La Silla observatory optical detection
  12. GRB 080207: GROND upper limits
  13. GRB 080207, Swift-BAT refined analysis
  14. Swift detection of AX J1749.1-2639
  15. GRB 080207, Swift-BAT refined analysis
  16. Swift Trigger 302777 is not a GRB
  17. GRB080207: Swift/UVOT refined analysis
  18. GRB 080207: TAROT Calern observatory optical observations
  19. GRB 080207: Swift-XRT Refined Analysis
  20. GRB 080207: Enhanced Swift-XRT position
  21. GRB 080207: Swift detection of a burst
  22. GRB 080205 optical upper limit
  23. VLA radio upper limit on GRB 080205
  24. GRB 080205, Swift-BAT refined analysis
  25. IPN localization of very hard GRB 080204
  26. GRB 080205: Swift XRT refined analysis
  27. GRB 080205: OA evolution from KAIT observations
  28. GRB 080205: Swift/UVOT observations
  29. GRB 080205: Enhanced Swift-XRT position
  30. GRB 080205: KAIT OA detection
  31. GRB 080205: Swift detection of a burst
  32. Swift-BAT Trigger #302454, correction of GCN notice, update on AX J1749.1-2639
  33. GRB 080130: Swift-BAT refined analysis
  34. GRB 080130: further Swift XRT observations confirm fading source
  35. GRB 080129: Swift/UVOT Refined Upper Limits
  36. Swift/UVOT observations of GRB080130
  37. GRB 080130(?): Swift XRT observation
  38. GRB 080129: Swift-XRT refined analysis
  39. GRB 080129: KAIT optical limits
  40. GRB 080129, Swift-BAT refined analysis
  41. GRB 080129: TAROT La Silla observatory optical observations
  42. GRB 080129: Gemini-South photometry
  43. GRB 080129: GROND detection in all bands, and fading
  44. GRB 080129: GROND detection of the optical/NIR afterglow, and fading
  45. GRB 080129: Enhanced Swift-XRT position
  46. GRB 080129: Swift XRT position
  47. GRB 080129 (?): UVOT Upper Limits
  48. GRB 080129 (?): Swift detection of a possible burst
  49. A new website of high-level data products for Swift GRBs
  50. GRB 080121: Upper limit on X-ray afterglow
  51. GRB 080123 : Suzaku WAM observation of the prompt emission
  52. Swift trigger(=301779) is not a GRB
  53. GRB 080121: Swift/UVOT upper limits
  54. SNe 2008D and 2007uy: Chandra Detections
  55. GRB 080121: Enhanced Swift-XRT position
  56. Two non-burst Swift SubThreshold triggers
  57. IPN triangulation of GRB080122
  58. GRB 080121: Nearby SDSS galaxies
  59. GRB 080121: Swift-BAT detection of a very weak, short burst
  60. GRB 080123: Swift-XRT refined analysis
  61. GRB 080123: Swift/UVOT refined analysis
  62. GRB 080123, Swift-BAT refined analysis
  63. GRB 080123: Enhanced Swift-XRT position
  64. GRB 080123: Swift detection of a short burst
  65. VLA radio upper limit on GRB 080120
  66. GRB 080120: Swift-XRT refined analysis
  67. UVOT detection of GRB080120
  68. GRB 080120: GROND detection
  69. GRB080120: Swift XRT position
  70. Swift UVOT Monitoring of the SN 2008D Brightening (Transient in NGC 2770)
  71. Swift observations of the X-ray transient in NGC 2770 (aka SN2008D)
  72. XRB 080109/SN 2008D: Early decline in brightness and change in colors
  73. XRB 080109/SN 2008D:PAIRITEL NIR observations and t_0 from Swift
  74. XRF 080109 in NGC2770: Detectable Superluminal Motion
  75. XRF in NGC 2770: Search for X-ray periodicity
  76. Refined Swift-XRT analysis of the transient in NGC 2770
  77. Refined Swift UVOT Analysis of SN 2008D (Transient in NGC 2770)
  78. Swift UVOT Observations of the X-ray transient in NGC 2770
  79. Early OT detection of XRF in NGC 2770 in Asiago frames
  80. Bright X-ray Transient in NGC 2770 - A low-luminosity XRF?
  81. GRB 071227: Suzaku WAM observation of the prompt emission
  82. Further Swift-BAT analysis of GRB 071227
  83. Konus-Wind observation of GRB 071227
  84. GRB 071227: Swift-XRT refined analysis
  85. GRB071227: Swift/UVOT refined analysis
  86. Swift-BAT refined analysis of short GRB 071227
  87. GRB 071227: Swift detection of a burst
  88. GRB 070429B: Possible UVOT Detection of an Optical Afterglow
  89. Swift-BAT trigger 298308 is not a GRB
  90. GRB 071208?: Swift detection of a possible burst
  91. GRB 071129, Swift-BAT refined analysis
  92. GRB 071129: Swift detection of a burst
  93. GRB 071126: Enhanced Swift-XRT position
  94. VLA radio detection of GRB 071122
  95. GRB071122: Swift/UVOT Observations
  96. GRB 071122, Swift-BAT refined analysis
  97. GRB 071122 Swift XRT position update sent in error.
  98. GRB 071122 Swift-XRT refined analysis
  99. GRB 071122: ROTSE-III Optical Limits
  100. GRB 071122: Swift detection of a burst

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