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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"

28229 results found.

  1. GRB 080319A: Swift-XRT Team Refined Analysis
  2. GRB 080319B, Swift-BAT refined analysis
  3. GRB 080319C: Swift-XRT Team Refined Analysis
  4. GRB 080319B: Swift-XRT Team Refined Analysis
  5. GRB 080319D: Swift/UVOT Refined Analysis of the Fading Optical Afterglow Candidate
  6. GRB 080319C: AGILE-MCAL observation of the prompt emission
  7. GRB 080319D: MASTER-VWF-Kislovodsk optical observation
  8. GRB 080319C: MASTER-VWF-Kislovodsk optical observation
  9. GRB 080319D: Swift detection of a burst with a possible optical afterglow
  10. GRB 080319B: TORTORA synchronous observation
  11. GRB 080319B: Enhanced Swift-XRT position
  12. GRB 080319A: Enhanced Swift-XRT position
  13. GRB 080319A, Swift-BAT refined analysis
  14. GRB 080319B: REM early data
  15. GRB 080319C: Swift detection of a burst with an optical afterglow
  16. GRB 080319A: REM observations
  17. GRB 080319B: Change in power law decay index
  18. GRB 080319B: Gemini-South Spectroscopy
  19. GRB 080319A: optical observations at the NOT
  20. GRB 080319B: REM observations
  21. GRB080319A: P60 Optical Afterglow Observations
  22. GRB 080319B: Swift detection of an intense burst with a bright optical counterpart
  23. GRB 080319A: Swift detection of a burst
  24. Swift Trigger 306745 is not a GRB
  25. Swift Trigger 306616 is not a GRB
  26. GRB080315: Bok Optical Observations
  27. Swift/UVOT observations of GRB 080315
  28. Swift trigger 306323: Swift-BAT/XRT refined analysis
  29. GRB 080315: Optical observations
  30. GRB 080315: TAROT Calern observatory optical observations
  31. GRB 080315: Swift detection of a possible burst
  32. GRB 080307: GAO 150cm telescope Optical Observation
  33. GRB 080229A: GAO 150cm telescope Optical Observation
  34. GRB 080310, Swift-BAT refined analysis
  35. GRB080210: optical observations
  36. GRB 080310: Swift-XRT refined analysis
  37. GRB 080310: Swift/UVOT Refined Analysis
  38. GRB 080310 - SDSS Pre-Burst Observations
  39. GRB 080310: Enhanced Swift-XRT position
  40. GRB 080310: RRM optical photometry with the VLT
  41. GRB080310, optical observations with LBT
  42. GRB 080310: REM observations
  43. GRB 080310: Swift detection of a burst with optical afterglow
  44. GRB080307, optical upper limit
  45. GRB080229, optical upper limit
  46. GRB 080307: Swift-XRT Team refined analysis
  47. GRB 080307: Swift/UVOT Upper Limits
  48. GRB 080307, Swift-BAT refined analysis
  49. GRB080307 - SDSS Pre-Burst Observations
  50. GRB 080307: TNT optical observation
  51. GRB080307: Optical upper limits
  52. GRB 080307: Gemini-N i-band observations - candidate afterglow
  53. GRB 080307: retraction of UVOT candidate
  54. GRB 080307: Enhanced Swift-XRT position
  55. GRB 080307, Preliminary Swift-BAT refined analysis
  56. GRB 080307: Optical observation with DMC/KANATA
  57. GRB 080307: Swift detection of a burst
  58. VLA possible radio detection of GRB 080229
  59. GRB 080303, Swift-BAT refined analysis
  60. GRB080303: Swift XRT refined analysis
  61. GRB 080303: Enhanced Swift-XRT position
  62. Swift UVOT observations of GRB080229B
  63. GRB080229B: Swift XRT afterglow observation
  64. GRB 080303: Swift detection of a burst with optical afterglow
  65. GRB 080303: REM NIR afterglow candidate
  66. GRB 080303A: ROTSE-III Optical Limits
  67. GRB 080229: I-band observations from OSN
  68. GRB 080229: VLT NIR observations
  69. GRB080229: Swift XRT refined analysis
  70. GRB 080229: TNG NIR observations
  71. GRB 080229: Enhanced Swift-XRT position
  72. GRB 080229: REM NIR observations
  73. GRB080229: Possible optical afterglow
  74. GRB 080229B: Gamma Ray Burst Localization by SuperAGILE
  75. UVOT analysis for GRB080229
  76. GRB 080229, Swift-BAT refined analysis
  77. GRB 080229A: ROTSE-III Optical Limits
  78. GRB 080229: Swift detection of a bright burst
  79. XRF 080109/SN2008D : GMRT upper limit at 1.28 GHz
  80. Swift-XRT improved positions, and new redshift limits.
  81. ESO optical and NIR observations of GRB 080218B
  82. GRB 080204: Suzaku WAM observation of the prompt emission
  83. GRB 080218B, Swift-BAT refined analysis
  84. GRB 080218B: Swift-XRT refined analysis
  85. Swift/UVOT observations of GRB080218B
  86. GRB 080218B: REM NIR early upper limits
  87. GRB 080218B: Enhanced Swift-XRT position
  88. GRB 080218B: GROND upper limits
  89. GRB 080218A, Swift-BAT refined analysis
  90. GRB 080211: Suzaku WAM observation of the prompt emission
  91. Swift-XRT and UVOT observations of the IPN burst GRB 080211
  92. VLA radio upper limit on GRB 080212
  93. Swift/UVOT refined analysis of GRB080212
  94. GRB 080212, Swift-BAT refined analysis
  95. GRB080212: Optical afterglow candidate observed by MITSuME Telescope
  96. GRB 080212: GROND detects afterglow
  97. GRB 080212: REM NIR afterglow?
  98. GRB 080212: Enhanced Swift-XRT position
  99. GRB 080212: Swift-XRT Team refined analysis
  100. GRB 080210: Keck photometry

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