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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"

42896 results found.

  1. GRB 080303: Swift detection of a burst with optical afterglow
  2. GRB 080303: REM NIR afterglow candidate
  3. GRB 080229: I-band observations from OSN
  4. GRB080229: Swift XRT refined analysis
  5. GRB 080229: Deep Gemini/GMOS optical observations
  6. GRB 080229: Enhanced Swift-XRT position
  7. GRB 080229: REM NIR observations
  8. GRB080229: Possible optical afterglow
  9. GRB 080229B: Gamma Ray Burst Localization by SuperAGILE
  10. UVOT analysis for GRB080229
  11. GRB 080229, Swift-BAT refined analysis
  12. GRB 080229: Faulkes Telescope South optical limit
  13. GRB 080229A: ROTSE-III Optical Limits
  14. GRB 080229: Swift detection of a bright burst
  15. Early optical shallow decay in GRB 071112C
  16. GRB080207: optical observations
  17. GRB080205: optical observations
  18. GRB080211: optical observations
  19. XRF 080109/SN2008D : GMRT upper limit at 1.28 GHz
  20. GRB 071010B : Early optical brightening detected by TAOS
  21. Swift-XRT improved positions, and new redshift limits.
  22. ESO optical and NIR observations of GRB 080218B
  23. GRB 080204: Suzaku WAM observation of the prompt emission
  24. GRB 080218B, Swift-BAT refined analysis
  25. GRB 080218B: Swift-XRT refined analysis
  26. Swift/UVOT observations of GRB080218B
  27. GRB 080218B: REM NIR early upper limits
  28. GRB 080218B: Enhanced Swift-XRT position
  29. GRB 080218B: GROND upper limits
  30. GRB 080218b, SMARTS optical/IR limits
  31. GRB 080218A, Swift-BAT refined analysis
  32. GRB 080211: Suzaku WAM observation of the prompt emission
  33. GRB 080218B: Swift detection of a burst
  34. GRB 080218: Swift detection of a burst
  35. Swift-XRT and UVOT observations of the IPN burst GRB 080211
  36. GRB 080212: VLT optical rapid decay
  37. GRB 080212: REM refined analysis
  38. Konus-Wind observation of GRB 080211
  39. VLA radio upper limit on GRB 080212
  40. Swift/UVOT refined analysis of GRB080212
  41. GRB 080212, Swift-BAT refined analysis
  42. GRB080212: Optical afterglow candidate observed by MITSuME Telescope
  43. GRB 080212: Gemini-South optical observations
  44. GRB 080212: GROND detects afterglow
  45. GRB 080212: REM NIR afterglow?
  46. GRB 080212: optical observations
  47. GRB 080212: Swift-XRT Team refined analysis
  48. GRB 080210: Keck photometry
  49. VLA non-detection of GRB 080210
  50. GRB 080212: Swift detection of a burst
  51. IPN localization of GRB 080211
  52. GRB 080210: Swift/UVOT Refined Analysis
  53. GRB 080207: optical observations.
  54. GRB 080210: Hobby-Eberly Telescope Absorption Spectroscopy
  55. GRB 080210, Swift-BAT refined analysis
  56. GRB 080210: Super-LOTIS observations
  57. GRB 080210: Swift-XRT Refined Analysis
  58. GRB 080210: VLT redshift
  59. GRB 080210: Rapid PROMPT Detections
  60. GRB 080210: GOND detection in all bands and redshift upper limit
  61. GRB080210 - SDSS Pre-Burst Observations
  62. GRB 080210: Swift detection of a burst with optical afterglow
  63. GRB 080210: TAROT La Silla observatory optical detection
  64. GRB 080207: GROND upper limits
  65. GRB 080207, Swift-BAT refined analysis
  66. GRB 080207: Optical limits from Gemini-South
  67. GRB 080205: RTT150 optical observations
  68. Swift detection of AX J1749.1-2639
  69. GRB 080207: Super-LOTIS observations
  70. GRB 080207, Swift-BAT refined analysis
  71. Swift Trigger 302777 is not a GRB
  72. GRB 080207: REM NIR observations
  73. GRB080207: Swift/UVOT refined analysis
  74. GRB 080207: TAROT Calern observatory optical observations
  75. GRB 080207: Swift-XRT Refined Analysis
  76. GRB 080207: Swift detection of a burst
  77. Konus-Wind observation of GRB 080204
  78. GRB 080205 optical upper limit
  79. GRB 080205: optical observation
  80. VLA radio upper limit on GRB 080205
  81. INT+WFC R-band observations of GRB 080205
  82. GRB 080205, Swift-BAT refined analysis
  83. IPN localization of very hard GRB 080204
  84. GRB 080205: Swift XRT refined analysis
  85. GRB 080205: OA evolution from KAIT observations
  86. GRB 080205: Swift/UVOT observations
  87. GRB 080205: KAIT OA detection
  88. GRB 080205: Swift detection of a burst
  89. GRB 080130: Swift-BAT refined analysis
  90. GRB 080130: further Swift XRT observations confirm fading source
  91. GRB 080129: Swift/UVOT Refined Upper Limits
  92. Swift/UVOT observations of GRB080130
  93. GRB 080130: REM NIR observations
  94. GRB 080130?: Detection of a possible burst by BATSS
  95. GRB 080129: Optical observations from OSN
  96. GRB 080129: Swift-XRT refined analysis
  97. X-ray transient in NGC 2770: RTT150 optical observations
  98. GRB 080129: KAIT optical limits
  99. GRB 080123: Early afterglow detection with BATSS (BAT Slew Survey)
  100. GRB 080129, Swift-BAT refined analysis

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