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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"

28115 results found.

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

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