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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"

28114 results found.

  1. GRB 080207: Optical limits from Gemini-South
  2. Swift detection of AX J1749.1-2639
  3. GRB 080207: Super-LOTIS observations
  4. GRB 080207, Swift-BAT refined analysis
  5. Swift Trigger 302777 is not a GRB
  6. GRB080207: RTT150 Optical Observations
  7. GRB 080207: REM NIR observations
  8. GRB080207: Swift/UVOT refined analysis
  9. GRB 080207: TAROT Calern observatory optical observations
  10. GRB 080207: Swift-XRT Refined Analysis
  11. GRB 080207: Enhanced Swift-XRT position
  12. GRB 080207: Swift detection of a burst
  13. GRB 080205: optical observation
  14. VLA radio upper limit on GRB 080205
  15. INT+WFC R-band observations of GRB 080205
  16. GRB 080205, Swift-BAT refined analysis
  17. IPN localization of very hard GRB 080204
  18. GRB 080205: Swift XRT refined analysis
  19. GRB 080205: Swift/UVOT observations
  20. GRB 080205: Enhanced Swift-XRT position
  21. Swift-BAT Trigger #302454, correction of GCN notice, update on AX J1749.1-2639
  22. GRB 080130: Swift-BAT refined analysis
  23. GRB 080130: further Swift XRT observations confirm fading source
  24. GRB 080129: Swift/UVOT Refined Upper Limits
  25. Swift/UVOT observations of GRB080130
  26. GRB 080130: REM NIR observations
  27. GRB 080130(?): Swift XRT observation
  28. GRB 080129: Swift-XRT refined analysis
  29. GRB 080129: KAIT optical limits
  30. GRB 080129, Swift-BAT refined analysis
  31. GRB 080129: TAROT La Silla observatory optical observations
  32. GRB 080129: GROND detection in all bands, and fading
  33. GRB 080129: GROND detection of the optical/NIR afterglow, and fading
  34. GRB 080129: Enhanced Swift-XRT position
  35. GRB 080129: Gemini-South Imaging Observations
  36. GRB 080129 (?): UVOT Upper Limits
  37. A new website of high-level data products for Swift GRBs
  38. GRB 080123 : Suzaku WAM observation of the prompt emission
  39. Transient 080109/SN 2008D: Spectroscopic Evolution
  40. Konus-Wind observation of GRB 080122
  41. GRB 080122 : Suzaku WAM observation of the prompt emission
  42. GRB 080121: Swift/UVOT upper limits
  43. SNe 2008D and 2007uy: Chandra Detections
  44. GRB 080121: Enhanced Swift-XRT position
  45. Transient 080109/SN 2008D: Spectroscopic Evolution and Re-Classification
  46. IPN triangulation of GRB080122
  47. GRB 080121: Nearby SDSS galaxies
  48. GRB 080123: Swift-XRT refined analysis
  49. GRB 080123: Swift/UVOT refined analysis
  50. GRB 080123, Swift-BAT refined analysis
  51. GRB 080123: Enhanced Swift-XRT position
  52. GRB 080123: Swift detection of a short burst
  53. GRB 080120: GROND confirmation of the optical afterglow
  54. VLA radio upper limit on GRB 080120
  55. GRB 080120: Swift-XRT refined analysis
  56. GRB 080120: GROND detection
  57. GRB080120: Swift XRT position
  58. GRB 080120: a long GRB detected by INTEGRAL
  59. Transient in NGC2770 / SN2008D: Metallicity of nearby HII regions
  60. Transient XRF 080109 / SN 2008D: Mount Abu NIR observations
  61. XRF 080109 / SN 2008D: UKIRT JHK imaging
  62. optical observations, XRT in NGC 2770
  63. XRF 080109/SN 2008D: PROMPT Optical Imaging
  64. Gemini-South observations of XRF 080109 / SN 2008D
  65. Swift observations of the X-ray transient in NGC 2770 (aka SN2008D)
  66. Discovery of Radio Emission from Transient in NGC 2770
  67. XRF 080109 in NGC2770: NIR observations at TNG
  68. XRB 080109/SN 2008D: Early decline in brightness and change in colors
  69. XRB 080109/SN 2008D:PAIRITEL NIR observations and t_0 from Swift
  70. XRF 080109 in NGC2770: Detectable Superluminal Motion
  71. Refined Swift-XRT analysis of the transient in NGC 2770
  72. Bright X-ray Transient in NGC 2770 - A low-luminosity XRF?
  73. GRB 071227: Suzaku WAM observation of the prompt emission
  74. GRB 071227: optical afterglow
  75. Further Swift-BAT analysis of GRB 071227
  76. Konus-Wind observation of GRB 071227
  77. GRB 071227: Swift-XRT refined analysis
  78. GRB 071227: VLT probable redshift of the candidate host galaxy
  79. GRB071227: Swift/UVOT refined analysis
  80. GRB 071227: REM NIR and Optical observations
  81. Swift-BAT refined analysis of short GRB 071227
  82. GRB 071227: Swift detection of a burst
  83. GRB 070429B: Possible UVOT Detection of an Optical Afterglow
  84. GRB 071125: Suzaku WAM observation of the prompt emission
  85. GRB 070429B: Probable host galaxy and redshift
  86. GRB 071129, Swift-BAT refined analysis
  87. GRB 071126: Enhanced Swift-XRT position
  88. GRB071122: Swift/UVOT Observations
  89. GRB071104: NIR Afterglow Candidate at TNG
  90. GRB 071122, Swift-BAT refined analysis
  91. GRB 071122 Swift-XRT refined analysis
  92. GRB 071122: P60 Optical Afterglow Candidate
  93. GRB 071122: Swift detection of a burst
  94. GRB 071118: P60 Observations
  95. GRB071118 MITSuME OAO optical observation
  96. GRB 071118: Observations from OSN
  97. GRB 071117: VLT observations and probable redshift
  98. Swift/UVOT observations of GRB071118
  99. Konus-Wind and Konus-A observations of GRB 071117
  100. Swift XRT follow-up observations of GRB071008

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