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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"

20523 results found.

  1. GRB080229: Possible optical afterglow
  2. UVOT analysis for GRB080229
  3. GRB 080229A: ROTSE-III Optical Limits
  4. GRB 080229: Swift detection of a bright burst
  5. GRB080205: optical observations
  6. XRF 080109/SN2008D : GMRT upper limit at 1.28 GHz
  7. GRB 071010B : Early optical brightening detected by TAOS
  8. Swift/UVOT observations of GRB080218B
  9. GRB 080218B: REM NIR early upper limits
  10. GRB 080218B: Enhanced Swift-XRT position
  11. GRB 080218B: GROND upper limits
  12. Swift-XRT and UVOT observations of the IPN burst GRB 080211
  13. GRB 080212: VLT optical rapid decay
  14. VLA radio upper limit on GRB 080212
  15. Swift/UVOT refined analysis of GRB080212
  16. GRB080212: Optical afterglow candidate observed by MITSuME Telescope
  17. GRB 080212: GROND detects afterglow
  18. GRB 080212: REM NIR afterglow?
  19. GRB 080212: Enhanced Swift-XRT position
  20. GRB 080210: Keck photometry
  21. VLA non-detection of GRB 080210
  22. GRB 080212: Swift detection of a burst
  23. GRB 080207: VLT NIR early upper limits
  24. GRB 080210: Swift/UVOT Refined Analysis
  25. GRB 080210, Swift-BAT refined analysis
  26. GRB 080210: Super-LOTIS observations
  27. GRB 080210: Enhanced Swift-XRT position
  28. GRB 080210: GOND detection in all bands and redshift upper limit
  29. GRB080210 - SDSS Pre-Burst Observations
  30. GRB 080210: Swift detection of a burst with optical afterglow
  31. GRB 080210: TAROT La Silla observatory optical detection
  32. GRB 080207: GROND upper limits
  33. GRB 080205: GAO 150cm telescope Optical limit
  34. GRB 080207: Optical limits from Gemini-South
  35. Swift detection of AX J1749.1-2639
  36. GRB 080207: Super-LOTIS observations
  37. GRB080207: RTT150 Optical Observations
  38. GRB 080207: REM NIR observations
  39. GRB080207: Swift/UVOT refined analysis
  40. GRB 080207: TAROT Calern observatory optical observations
  41. GRB 080207: Swift-XRT Refined Analysis
  42. GRB 080207: Enhanced Swift-XRT position
  43. GRB 080207: Swift detection of a burst
  44. GRB 080205: optical observation
  45. VLA radio upper limit on GRB 080205
  46. INT+WFC R-band observations of GRB 080205
  47. IPN localization of very hard GRB 080204
  48. GRB 080205: Swift XRT refined analysis
  49. GRB 080205: OA evolution from KAIT observations
  50. GRB 080205: Swift/UVOT observations
  51. GRB 080205: Enhanced Swift-XRT position
  52. Swift-BAT Trigger #302454, correction of GCN notice, update on AX J1749.1-2639
  53. GRB 080130: Swift-BAT refined analysis
  54. GRB 080130: further Swift XRT observations confirm fading source
  55. GRB 080129: Swift/UVOT Refined Upper Limits
  56. Swift/UVOT observations of GRB080130
  57. GRB 080130: REM NIR observations
  58. GRB 080130(?): Swift XRT observation
  59. GRB 080129: Swift-XRT refined analysis
  60. GRB 080129: KAIT optical limits
  61. GRB 080129: TAROT La Silla observatory optical observations
  62. GRB 080129: Gemini-South photometry
  63. GRB 080129: GROND detection in all bands, and fading
  64. GRB 080129: GROND detection of the optical/NIR afterglow, and fading
  65. GRB 080129: Enhanced Swift-XRT position
  66. GRB 080129: Gemini-South Imaging Observations
  67. GRB 080129 (?): UVOT Upper Limits
  68. A new website of high-level data products for Swift GRBs
  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: Enhanced Swift-XRT position
  73. IPN triangulation of GRB080122
  74. GRB 080121: Nearby SDSS galaxies
  75. GRB 080123: Swift/UVOT refined analysis
  76. GRB 080123: Enhanced Swift-XRT position
  77. GRB 080123: Swift detection of a short burst
  78. GRB 080120: GROND confirmation of the optical afterglow
  79. VLA radio upper limit on GRB 080120
  80. GRB 080120: Swift-XRT refined analysis
  81. GRB080120: Swift XRT position
  82. Transient XRF 080109 / SN 2008D: Mount Abu NIR observations
  83. XRF 080109 / SN 2008D: UKIRT JHK imaging
  84. optical observations, XRT in NGC 2770
  85. Gemini-South observations of XRF 080109 / SN 2008D
  86. Swift observations of the X-ray transient in NGC 2770 (aka SN2008D)
  87. Discovery of Radio Emission from Transient in NGC 2770
  88. XRF 080109 in NGC2770: NIR observations at TNG
  89. XRB 080109/SN 2008D: Early decline in brightness and change in colors
  90. XRB 080109/SN 2008D:PAIRITEL NIR observations and t_0 from Swift
  91. XRF 080109 in NGC2770: Detectable Superluminal Motion
  92. Refined Swift-XRT analysis of the transient in NGC 2770
  93. Bright X-ray Transient in NGC 2770 - A low-luminosity XRF?
  94. GRB 071227: optical afterglow
  95. Further Swift-BAT analysis of GRB 071227
  96. GRB 071227: Swift-XRT refined analysis
  97. GRB 071227: VLT probable redshift of the candidate host galaxy
  98. GRB071227: Swift/UVOT refined analysis
  99. GRB 071227: REM NIR and Optical observations
  100. GRB 071227: Swift detection of a burst

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