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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"

35999 results found.

  1. GRB 080210: Swift/UVOT Refined Analysis
  2. GRB 080207: optical observations.
  3. GRB 080210: Hobby-Eberly Telescope Absorption Spectroscopy
  4. GRB 080210, Swift-BAT refined analysis
  5. GRB 080210: Super-LOTIS observations
  6. GRB 080210: Swift-XRT Refined Analysis
  7. GRB 080210: VLT redshift
  8. GRB 080210: Enhanced Swift-XRT position
  9. GRB 080210: Rapid PROMPT Detections
  10. GRB 080210: GOND detection in all bands and redshift upper limit
  11. GRB080210 - SDSS Pre-Burst Observations
  12. GRB 080210: Swift detection of a burst with optical afterglow
  13. GRB 080210: TAROT La Silla observatory optical detection
  14. GRB 080207: GROND upper limits
  15. GRB 080205: GAO 150cm telescope Optical limit
  16. GRB 080207, Swift-BAT refined analysis
  17. GRB 080207: Optical limits from Gemini-South
  18. GRB 080205: RTT150 optical observations
  19. GRB 080207: Super-LOTIS observations
  20. GRB 080207, Swift-BAT refined analysis
  21. Swift Trigger 302777 is not a GRB
  22. GRB080207: RTT150 Optical Observations
  23. GRB 080207: REM NIR observations
  24. GRB 080207: TAROT Calern observatory optical observations
  25. GRB 080207: Swift-XRT Refined Analysis
  26. GRB 080207: Enhanced Swift-XRT position
  27. GRB 080207: Swift detection of a burst
  28. Konus-Wind observation of GRB 080204
  29. GRB 080205 optical upper limit
  30. GRB 080205: MASTER optical observation
  31. GRB 080205: optical observation
  32. VLA radio upper limit on GRB 080205
  33. INT+WFC R-band observations of GRB 080205
  34. GRB 080205, Swift-BAT refined analysis
  35. IPN localization of very hard GRB 080204
  36. GRB 080205: Swift XRT refined analysis
  37. GRB 080205: OA evolution from KAIT observations
  38. GRB 080205: Swift/UVOT observations
  39. GRB 080205: Enhanced Swift-XRT position
  40. GRB 080205: KAIT OA detection
  41. GRB 080205: Swift detection of a burst
  42. GRB 080130: Swift-BAT refined analysis
  43. GRB 080130: further Swift XRT observations confirm fading source
  44. GRB 080129: Swift/UVOT Refined Upper Limits
  45. GRB 080130: REM NIR observations
  46. GRB 080130(?): Swift XRT observation
  47. GRB 080130?: Detection of a possible burst by BATSS
  48. GRB 080129: Optical observations from OSN
  49. GRB 080129: Swift-XRT refined analysis
  50. GRB 080129: KAIT optical limits
  51. GRB 080123: Early afterglow detection with BATSS (BAT Slew Survey)
  52. GRB 080129: optical limit by Pi of the Sky
  53. GRB 080129, Swift-BAT refined analysis
  54. GRB 080129: TAROT La Silla observatory optical observations
  55. GRB 080129: Gemini-South photometry
  56. GRB 080129: GROND detection in all bands, and fading
  57. GRB 080129: GROND detection of the optical/NIR afterglow, and fading
  58. GRB 080129: Enhanced Swift-XRT position
  59. GRB 080129: Gemini-South Imaging Observations
  60. GRB 080129: Swift XRT position
  61. GRB 080129 (?): UVOT Upper Limits
  62. GRB 080129 (?): Swift detection of a possible burst
  63. A new website of high-level data products for Swift GRBs
  64. GRB 080121: Upper limit on X-ray afterglow
  65. GRB 080123 : Suzaku WAM observation of the prompt emission
  66. Swift trigger(=301779) is not a GRB
  67. GRB 080122: pseudo-z= 1.93 from prompt emission spectrum
  68. Konus-Wind observation of GRB 080122
  69. GRB 080122 : Suzaku WAM observation of the prompt emission
  70. GRB 080121: Swift/UVOT upper limits
  71. SNe 2008D and 2007uy: Chandra Detections
  72. GRB 080121 position was incorrect
  73. GRB 080121: Enhanced Swift-XRT position
  74. IPN triangulation of GRB080122
  75. GRB 080121: Nearby SDSS galaxies
  76. GRB 080121: Swift-BAT detection of a very weak, short burst
  77. GRB 080123: Swift-XRT refined analysis
  78. GRB 080123: Swift/UVOT refined analysis
  79. X-ray transient in NGC 2770: RTT150 optical observations
  80. GRB 080123, Swift-BAT refined analysis
  81. GRB 080123: Enhanced Swift-XRT position
  82. GRB 080123: Swift detection of a short burst
  83. GRB 080120: GROND confirmation of the optical afterglow
  84. VLA radio upper limit on GRB 080120
  85. GRB 080120: Swift-XRT refined analysis
  86. GRB 080120: GROND detection
  87. GRB 080120 : Planned XMM-Newton observation
  88. GRB080120: Swift XRT position
  89. GRB 080120: a long GRB detected by INTEGRAL
  90. XRF 080109 / SN 2008D: spectroscopic evolution
  91. Swift observations of the X-ray transient in NGC 2770 (aka SN2008D)
  92. XRB 080109/SN 2008D: Early decline in brightness and change in colors
  93. XRF 080109 in NGC2770: Detectable Superluminal Motion
  94. Detailed Spectroscopic ID of SN 2008D (Transient in NGC 2770)
  95. Transient in NGC 2770: spectroscopic evidence for a SN
  96. Bright X-ray transient / possible XRF in NGC 2770: TNG R imaging
  97. GRB 071227: Suzaku WAM observation of the prompt emission
  98. GRB 071227: optical afterglow
  99. Further Swift-BAT analysis of GRB 071227
  100. Konus-Wind observation of GRB 071227

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