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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"

43881 results found.

  1. GRB 080218B: Swift-XRT refined analysis
  2. Swift/UVOT observations of GRB080218B
  3. GRB 080218B: REM NIR early upper limits
  4. GRB 080218B: Enhanced Swift-XRT position
  5. GRB 080218B: GROND upper limits
  6. GRB 080218b, SMARTS optical/IR limits
  7. GRB 080218A, Swift-BAT refined analysis
  8. GRB 080211: Suzaku WAM observation of the prompt emission
  9. GRB 080218B: Swift detection of a burst
  10. GRB 080218: Swift detection of a burst
  11. Swift-XRT and UVOT observations of the IPN burst GRB 080211
  12. GRB 080212: VLT optical rapid decay
  13. GRB 080212: REM refined analysis
  14. Konus-Wind observation of GRB 080211
  15. VLA radio upper limit on GRB 080212
  16. Swift/UVOT refined analysis of GRB080212
  17. GRB 080212, Swift-BAT refined analysis
  18. GRB080212: Optical afterglow candidate observed by MITSuME Telescope
  19. GRB 080212: Gemini-South optical observations
  20. GRB 080212: GROND detects afterglow
  21. GRB 080212: REM NIR afterglow?
  22. GRB 080212: optical observations
  23. GRB 080212: Swift-XRT Team refined analysis
  24. GRB 080210: Keck photometry
  25. VLA non-detection of GRB 080210
  26. GRB 080212: Swift detection of a burst
  27. IPN localization of GRB 080211
  28. GRB 080207: VLT NIR early upper limits
  29. GRB 080210: Swift/UVOT Refined Analysis
  30. GRB 080207: optical observations.
  31. GRB 080210: Hobby-Eberly Telescope Absorption Spectroscopy
  32. GRB 080210, Swift-BAT refined analysis
  33. GRB 080210: Super-LOTIS observations
  34. GRB 080210: Swift-XRT Refined Analysis
  35. GRB 080210: VLT redshift
  36. GRB 080210: Rapid PROMPT Detections
  37. GRB 080210: GOND detection in all bands and redshift upper limit
  38. GRB080210 - SDSS Pre-Burst Observations
  39. GRB 080210: Swift detection of a burst with optical afterglow
  40. GRB 080210: TAROT La Silla observatory optical detection
  41. GRB 080207: GROND upper limits
  42. GRB 080207, Swift-BAT refined analysis
  43. GRB 080207: Optical limits from Gemini-South
  44. GRB 080205: RTT150 optical observations
  45. Swift detection of AX J1749.1-2639
  46. GRB 080207: Super-LOTIS observations
  47. GRB 080207, Swift-BAT refined analysis
  48. Swift Trigger 302777 is not a GRB
  49. GRB 080207: REM NIR observations
  50. GRB080207: Swift/UVOT refined analysis
  51. GRB 080207: TAROT Calern observatory optical observations
  52. GRB 080207: Swift-XRT Refined Analysis
  53. GRB 080207: Swift detection of a burst
  54. Konus-Wind observation of GRB 080204
  55. GRB 080205 optical upper limit
  56. GRB 080205: MASTER optical observation
  57. GRB 080205: optical observation
  58. VLA radio upper limit on GRB 080205
  59. INT+WFC R-band observations of GRB 080205
  60. GRB 080205, Swift-BAT refined analysis
  61. IPN localization of very hard GRB 080204
  62. GRB 080205: Swift XRT refined analysis
  63. GRB 080205: OA evolution from KAIT observations
  64. GRB 080205: Swift/UVOT observations
  65. GRB 080205: KAIT OA detection
  66. GRB 080205: Swift detection of a burst
  67. GRB 080130: Swift-BAT refined analysis
  68. GRB 080130: further Swift XRT observations confirm fading source
  69. GRB 080129: Swift/UVOT Refined Upper Limits
  70. Swift/UVOT observations of GRB080130
  71. GRB 080130: REM NIR observations
  72. GRB 080130(?): Swift XRT observation
  73. GRB 080130?: Detection of a possible burst by BATSS
  74. GRB 080129: Optical observations from OSN
  75. GRB 080129: Swift-XRT refined analysis
  76. X-ray transient in NGC 2770: RTT150 optical observations
  77. GRB 080129: KAIT optical limits
  78. GRB 080123: Early afterglow detection with BATSS (BAT Slew Survey)
  79. GRB 080129: optical limit by Pi of the Sky
  80. GRB 080129, Swift-BAT refined analysis
  81. GRB 080129: TAROT La Silla observatory optical observations
  82. GRB 080129: Gemini-South photometry
  83. GRB 080129: GROND detection in all bands, and fading
  84. GRB 080129: GROND detection of the optical/NIR afterglow, and fading
  85. GRB 080129: Gemini-South Imaging Observations
  86. GRB 080129: Swift XRT position
  87. GRB 080129 (?): UVOT Upper Limits
  88. GRB 080129 (?): Swift detection of a possible burst
  89. A new website of high-level data products for Swift GRBs
  90. GRB 080121: Upper limit on X-ray afterglow
  91. GRB 080123 : Suzaku WAM observation of the prompt emission
  92. Swift trigger(=301779) is not a GRB
  93. Transient 080109/SN 2008D: Spectroscopic Evolution
  94. GRB 080122: pseudo-z= 1.93 from prompt emission spectrum
  95. Konus-Wind observation of GRB 080122
  96. GRB 080122 : Suzaku WAM observation of the prompt emission
  97. GRB 080121: Swift/UVOT upper limits
  98. SNe 2008D and 2007uy: Chandra Detections
  99. GRB 080121 position was incorrect
  100. Two non-burst Swift SubThreshold triggers

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