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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"

42902 results found.

  1. GRB080303: Swift XRT refined analysis
  2. GRB 080303: Enhanced Swift-XRT position
  3. Swift UVOT observations of GRB080229B
  4. GRB080229B: Swift XRT afterglow observation
  5. GRB 080303A: Faulkes Telescope South optical afterglow observations
  6. GRB 080303
  7. GRB 080303: Swift detection of a burst with optical afterglow
  8. GRB 080303: REM NIR afterglow candidate
  9. GRB 080229: I-band observations from OSN
  10. GRB080229: Swift XRT refined analysis
  11. GRB 080229: Deep Gemini/GMOS optical observations
  12. GRB 080229: Enhanced Swift-XRT position
  13. GRB 080229: REM NIR observations
  14. GRB080229: Possible optical afterglow
  15. GRB 080229B: Gamma Ray Burst Localization by SuperAGILE
  16. UVOT analysis for GRB080229
  17. GRB 080229, Swift-BAT refined analysis
  18. GRB 080229: Faulkes Telescope South optical limit
  19. GRB 080229A: ROTSE-III Optical Limits
  20. GRB 080229: Swift detection of a bright burst
  21. Early optical shallow decay in GRB 071112C
  22. GRB080207: optical observations
  23. GRB080205: optical observations
  24. GRB080211: optical observations
  25. XRF 080109/SN2008D : GMRT upper limit at 1.28 GHz
  26. GRB 071010B : Early optical brightening detected by TAOS
  27. Swift-XRT improved positions, and new redshift limits.
  28. ESO optical and NIR observations of GRB 080218B
  29. GRB 080204: Suzaku WAM observation of the prompt emission
  30. GRB 080218B, Swift-BAT refined analysis
  31. GRB 080218B: Swift-XRT refined analysis
  32. Swift/UVOT observations of GRB080218B
  33. GRB 080218B: REM NIR early upper limits
  34. GRB 080218B: Enhanced Swift-XRT position
  35. GRB 080218B: GROND upper limits
  36. GRB 080218b, SMARTS optical/IR limits
  37. GRB 080218A, Swift-BAT refined analysis
  38. GRB 080211: Suzaku WAM observation of the prompt emission
  39. GRB 080218B: Swift detection of a burst
  40. GRB 080218: Swift detection of a burst
  41. Swift-XRT and UVOT observations of the IPN burst GRB 080211
  42. GRB 080212: VLT optical rapid decay
  43. GRB 080212: REM refined analysis
  44. Konus-Wind observation of GRB 080211
  45. VLA radio upper limit on GRB 080212
  46. Swift/UVOT refined analysis of GRB080212
  47. GRB 080212, Swift-BAT refined analysis
  48. GRB080212: Optical afterglow candidate observed by MITSuME Telescope
  49. GRB 080212: Gemini-South optical observations
  50. GRB 080212: GROND detects afterglow
  51. GRB 080212: REM NIR afterglow?
  52. GRB 080212: optical observations
  53. GRB 080212: Swift-XRT Team refined analysis
  54. GRB 080210: Keck photometry
  55. VLA non-detection of GRB 080210
  56. GRB 080212: Swift detection of a burst
  57. IPN localization of GRB 080211
  58. GRB 080210: Swift/UVOT Refined Analysis
  59. GRB 080207: optical observations.
  60. GRB 080210: Hobby-Eberly Telescope Absorption Spectroscopy
  61. GRB 080210, Swift-BAT refined analysis
  62. GRB 080210: Super-LOTIS observations
  63. GRB 080210: Swift-XRT Refined Analysis
  64. GRB 080210: VLT redshift
  65. GRB 080210: Rapid PROMPT Detections
  66. GRB 080210: GOND detection in all bands and redshift upper limit
  67. GRB080210 - SDSS Pre-Burst Observations
  68. GRB 080210: Swift detection of a burst with optical afterglow
  69. GRB 080210: TAROT La Silla observatory optical detection
  70. GRB 080207: GROND upper limits
  71. GRB 080207, Swift-BAT refined analysis
  72. GRB 080207: Optical limits from Gemini-South
  73. GRB 080205: RTT150 optical observations
  74. Swift detection of AX J1749.1-2639
  75. GRB 080207: Super-LOTIS observations
  76. GRB 080207, Swift-BAT refined analysis
  77. Swift Trigger 302777 is not a GRB
  78. GRB 080207: REM NIR observations
  79. GRB080207: Swift/UVOT refined analysis
  80. GRB 080207: TAROT Calern observatory optical observations
  81. GRB 080207: Swift-XRT Refined Analysis
  82. GRB 080207: Swift detection of a burst
  83. Konus-Wind observation of GRB 080204
  84. GRB 080205 optical upper limit
  85. GRB 080205: optical observation
  86. VLA radio upper limit on GRB 080205
  87. INT+WFC R-band observations of GRB 080205
  88. GRB 080205, Swift-BAT refined analysis
  89. IPN localization of very hard GRB 080204
  90. GRB 080205: Swift XRT refined analysis
  91. GRB 080205: OA evolution from KAIT observations
  92. GRB 080205: Swift/UVOT observations
  93. GRB 080205: KAIT OA detection
  94. GRB 080205: Swift detection of a burst
  95. GRB 080130: Swift-BAT refined analysis
  96. GRB 080130: further Swift XRT observations confirm fading source
  97. GRB 080129: Swift/UVOT Refined Upper Limits
  98. Swift/UVOT observations of GRB080130
  99. GRB 080130: REM NIR observations
  100. GRB 080130?: Detection of a possible burst by BATSS

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