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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"

28273 results found.

  1. GRB 080307: Swift detection of a burst
  2. VLA possible radio detection of GRB 080229
  3. GRB 080303, Swift-BAT refined analysis
  4. GRB080303: Swift XRT refined analysis
  5. GRB 080303: Enhanced Swift-XRT position
  6. Swift UVOT observations of GRB080229B
  7. GRB080229B: Swift XRT afterglow observation
  8. GRB 080303: Swift detection of a burst with optical afterglow
  9. GRB 080303: REM NIR afterglow candidate
  10. GRB 080303A: ROTSE-III Optical Limits
  11. GRB 080229: I-band observations from OSN
  12. GRB 080229: VLT NIR observations
  13. GRB080229: Swift XRT refined analysis
  14. GRB 080229: TNG NIR observations
  15. GRB 080229: Enhanced Swift-XRT position
  16. GRB 080229: REM NIR observations
  17. GRB080229: Possible optical afterglow
  18. GRB 080229B: Gamma Ray Burst Localization by SuperAGILE
  19. UVOT analysis for GRB080229
  20. GRB 080229, Swift-BAT refined analysis
  21. GRB 080229A: ROTSE-III Optical Limits
  22. GRB 080229: Swift detection of a bright burst
  23. XRF 080109/SN2008D : GMRT upper limit at 1.28 GHz
  24. Swift-XRT improved positions, and new redshift limits.
  25. ESO optical and NIR observations of GRB 080218B
  26. GRB 080204: Suzaku WAM observation of the prompt emission
  27. GRB 080218B, Swift-BAT refined analysis
  28. GRB 080218B: Swift-XRT refined analysis
  29. Swift/UVOT observations of GRB080218B
  30. GRB 080218B: REM NIR early upper limits
  31. GRB 080218B: Enhanced Swift-XRT position
  32. GRB 080218B: GROND upper limits
  33. GRB 080218A, Swift-BAT refined analysis
  34. GRB 080211: Suzaku WAM observation of the prompt emission
  35. Swift-XRT and UVOT observations of the IPN burst GRB 080211
  36. VLA radio upper limit on GRB 080212
  37. Swift/UVOT refined analysis of GRB080212
  38. GRB 080212, Swift-BAT refined analysis
  39. GRB080212: Optical afterglow candidate observed by MITSuME Telescope
  40. GRB 080212: GROND detects afterglow
  41. GRB 080212: REM NIR afterglow?
  42. GRB 080212: Enhanced Swift-XRT position
  43. GRB 080212: Swift-XRT Team refined analysis
  44. GRB 080210: Keck photometry
  45. VLA non-detection of GRB 080210
  46. GRB 080212: Swift detection of a burst
  47. GRB 080207: VLT NIR early upper limits
  48. GRB 080210: Swift/UVOT Refined Analysis
  49. GRB 080210, Swift-BAT refined analysis
  50. GRB 080210: Super-LOTIS observations
  51. GRB 080210: Swift-XRT Refined Analysis
  52. GRB 080210: Enhanced Swift-XRT position
  53. GRB 080210: GOND detection in all bands and redshift upper limit
  54. GRB080210 - SDSS Pre-Burst Observations
  55. GRB 080210: Swift detection of a burst with optical afterglow
  56. GRB 080210: TAROT La Silla observatory optical detection
  57. GRB 080207: GROND upper limits
  58. GRB 080205: GAO 150cm telescope Optical limit
  59. GRB 080207, Swift-BAT refined analysis
  60. GRB 080207: Optical limits from Gemini-South
  61. Swift detection of AX J1749.1-2639
  62. GRB 080207: Super-LOTIS observations
  63. GRB 080207, Swift-BAT refined analysis
  64. Swift Trigger 302777 is not a GRB
  65. GRB080207: RTT150 Optical Observations
  66. GRB 080207: REM NIR observations
  67. GRB080207: Swift/UVOT refined analysis
  68. GRB 080207: TAROT Calern observatory optical observations
  69. GRB 080207: Swift-XRT Refined Analysis
  70. GRB 080207: Enhanced Swift-XRT position
  71. GRB 080207: Swift detection of a burst
  72. GRB 080205: optical observation
  73. VLA radio upper limit on GRB 080205
  74. INT+WFC R-band observations of GRB 080205
  75. GRB 080205, Swift-BAT refined analysis
  76. IPN localization of very hard GRB 080204
  77. GRB 080205: Swift XRT refined analysis
  78. GRB 080205: Swift/UVOT observations
  79. GRB 080205: Enhanced Swift-XRT position
  80. Swift-BAT Trigger #302454, correction of GCN notice, update on AX J1749.1-2639
  81. GRB 080130: Swift-BAT refined analysis
  82. GRB 080130: further Swift XRT observations confirm fading source
  83. GRB 080129: Swift/UVOT Refined Upper Limits
  84. Swift/UVOT observations of GRB080130
  85. GRB 080130: REM NIR observations
  86. GRB 080130(?): Swift XRT observation
  87. GRB 080129: Swift-XRT refined analysis
  88. GRB 080129: KAIT optical limits
  89. GRB 080129, Swift-BAT refined analysis
  90. GRB 080129: TAROT La Silla observatory optical observations
  91. GRB 080129: GROND detection in all bands, and fading
  92. GRB 080129: GROND detection of the optical/NIR afterglow, and fading
  93. GRB 080129: Enhanced Swift-XRT position
  94. GRB 080129: Gemini-South Imaging Observations
  95. GRB 080129 (?): UVOT Upper Limits
  96. A new website of high-level data products for Swift GRBs
  97. GRB 080123 : Suzaku WAM observation of the prompt emission
  98. Transient 080109/SN 2008D: Spectroscopic Evolution
  99. Konus-Wind observation of GRB 080122
  100. GRB 080122 : Suzaku WAM observation of the prompt emission

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