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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"

28098 results found.

  1. IPN localization of very hard GRB 080204
  2. GRB 080205: Swift XRT refined analysis
  3. GRB 080205: Swift/UVOT observations
  4. GRB 080205: Enhanced Swift-XRT position
  5. Swift-BAT Trigger #302454, correction of GCN notice, update on AX J1749.1-2639
  6. GRB 080130: Swift-BAT refined analysis
  7. GRB 080130: further Swift XRT observations confirm fading source
  8. GRB 080129: Swift/UVOT Refined Upper Limits
  9. Swift/UVOT observations of GRB080130
  10. GRB 080130: REM NIR observations
  11. GRB 080130(?): Swift XRT observation
  12. GRB 080129: Swift-XRT refined analysis
  13. GRB 080129: KAIT optical limits
  14. GRB 080129, Swift-BAT refined analysis
  15. GRB 080129: TAROT La Silla observatory optical observations
  16. GRB 080129: GROND detection in all bands, and fading
  17. GRB 080129: GROND detection of the optical/NIR afterglow, and fading
  18. GRB 080129: Enhanced Swift-XRT position
  19. GRB 080129: Gemini-South Imaging Observations
  20. GRB 080129 (?): UVOT Upper Limits
  21. A new website of high-level data products for Swift GRBs
  22. GRB 080123 : Suzaku WAM observation of the prompt emission
  23. Transient 080109/SN 2008D: Spectroscopic Evolution
  24. Konus-Wind observation of GRB 080122
  25. GRB 080122 : Suzaku WAM observation of the prompt emission
  26. GRB 080121: Swift/UVOT upper limits
  27. SNe 2008D and 2007uy: Chandra Detections
  28. GRB 080121: Enhanced Swift-XRT position
  29. Transient 080109/SN 2008D: Spectroscopic Evolution and Re-Classification
  30. IPN triangulation of GRB080122
  31. GRB 080121: Nearby SDSS galaxies
  32. GRB 080123: Swift-XRT refined analysis
  33. GRB 080123: Swift/UVOT refined analysis
  34. GRB 080123, Swift-BAT refined analysis
  35. GRB 080123: Enhanced Swift-XRT position
  36. GRB 080123: Swift detection of a short burst
  37. GRB 080120: GROND confirmation of the optical afterglow
  38. VLA radio upper limit on GRB 080120
  39. GRB 080120: Swift-XRT refined analysis
  40. GRB 080120: GROND detection
  41. GRB080120: Swift XRT position
  42. GRB 080120: a long GRB detected by INTEGRAL
  43. Transient in NGC2770 / SN2008D: Metallicity of nearby HII regions
  44. Transient XRF 080109 / SN 2008D: Mount Abu NIR observations
  45. XRF 080109 / SN 2008D: UKIRT JHK imaging
  46. optical observations, XRT in NGC 2770
  47. XRF 080109/SN 2008D: PROMPT Optical Imaging
  48. Gemini-South observations of XRF 080109 / SN 2008D
  49. Swift observations of the X-ray transient in NGC 2770 (aka SN2008D)
  50. Discovery of Radio Emission from Transient in NGC 2770
  51. XRF 080109 in NGC2770: NIR observations at TNG
  52. XRB 080109/SN 2008D: Early decline in brightness and change in colors
  53. XRB 080109/SN 2008D:PAIRITEL NIR observations and t_0 from Swift
  54. XRF 080109 in NGC2770: Detectable Superluminal Motion
  55. Refined Swift-XRT analysis of the transient in NGC 2770
  56. Bright X-ray Transient in NGC 2770 - A low-luminosity XRF?
  57. GRB 071227: Suzaku WAM observation of the prompt emission
  58. GRB 071227: optical afterglow
  59. Further Swift-BAT analysis of GRB 071227
  60. Konus-Wind observation of GRB 071227
  61. GRB 071227: Swift-XRT refined analysis
  62. GRB 071227: VLT probable redshift of the candidate host galaxy
  63. GRB071227: Swift/UVOT refined analysis
  64. GRB 071227: REM NIR and Optical observations
  65. Swift-BAT refined analysis of short GRB 071227
  66. GRB 071227: Swift detection of a burst
  67. GRB 070429B: Possible UVOT Detection of an Optical Afterglow
  68. GRB 071125: Suzaku WAM observation of the prompt emission
  69. GRB 070429B: Probable host galaxy and redshift
  70. GRB 071129, Swift-BAT refined analysis
  71. GRB 071126: Enhanced Swift-XRT position
  72. GRB071122: Swift/UVOT Observations
  73. GRB071104: NIR Afterglow Candidate at TNG
  74. GRB 071122, Swift-BAT refined analysis
  75. GRB 071122 Swift-XRT refined analysis
  76. GRB 071122: P60 Optical Afterglow Candidate
  77. GRB 071122: Swift detection of a burst
  78. GRB 071118: P60 Observations
  79. GRB071118 MITSuME OAO optical observation
  80. GRB 071118: Observations from OSN
  81. GRB 071117: VLT observations and probable redshift
  82. Swift/UVOT observations of GRB071118
  83. Konus-Wind and Konus-A observations of GRB 071117
  84. Swift XRT follow-up observations of GRB071008
  85. Swift/UVOT upper limits for GRB 071117
  86. GRB071118: Swift XRT refined analysis
  87. GRB 071117: Gemini Optical Afterglow Discovery
  88. GRB 071118, Swift-BAT refined analysis
  89. GRB 071117: TAROT La Silla observatory optical observations
  90. GRB 071118: Swift detection of a burst
  91. GRB 071117: Gemini Observations
  92. GRB 071117: Swift-XRT refined analysis
  93. GRB 071117, Swift-BAT refined analysis
  94. Swift detection of MXB 0656-072
  95. GRB 071112C: Optical and NIR data observed with KANATA
  96. GRB 071112C MITSuME Akeno early optical observation
  97. GRB 071112C: SARA upper limit
  98. GRB 071112C : Second Epoch Lulin R-band observations
  99. GRB071112C MITSuME Okayama Optical Observation
  100. GRB 071112C: Swift-BAT refined analysis

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