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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"

20510 results found.

  1. GRB 080325: Early observations from OSN
  2. GRB 080325: NIR afterglow candidate
  3. GRB 080319D: GROND Detection of the Optical Counterpart
  4. GRB 080325: Enhanced Swift-XRT position
  5. GRB 080325: Swift detection of a burst
  6. GRB 080319B: Spitzer Mid-infrared Observations
  7. GRB 080319B: Second & Third Epoch WSRT Radio Observations
  8. Radio Detection of GRB 080319B
  9. GRB 080319D: GROND Observations
  10. GRB 080319B: optical upper limit
  11. GRB 080319D: optical upper limit
  12. GRB 080319D, Swift-BAT refined analysis
  13. GRB 080319C: UVOT Observations
  14. GRB 080319B: UVOT Observations
  15. GRB 080319A: UVOT Observations
  16. GRB 080320: Swift XRT refined analysis
  17. GRB 080320: J detection with FLAMINGOS
  18. GRB 080319D: Swift XRT refined analysis
  19. GRB 080320: optical limit
  20. GRB 080320: Gemini-N optical afterglow
  21. Konus-Wind observation of GRB 080319C
  22. Konus-Wind observation of GRB 080319B
  23. GRB 080320: Enhanced Swift-XRT position
  24. GRB 080320 - SDSS Pre-Burst Observations
  25. GRB 080320: Swift detection of a burst
  26. GRB 080319C - SDSS Pre-Burst Observations
  27. GRB 080319A SDSS Pre-Burst Observations
  28. GRB080319B - SDSS Pre-Burst Observations
  29. GRB 080319C: Swift-XRT Team Refined Analysis
  30. GRB 080319B: Swift-XRT Team Refined Analysis
  31. GRB 080319D: Swift/UVOT Refined Analysis of the Fading Optical Afterglow Candidate
  32. GRB 080319C: AGILE-MCAL observation of the prompt emission
  33. GRB 080319D: MASTER-VWF-Kislovodsk optical observation
  34. GRB 080319C: MASTER-VWF-Kislovodsk optical observation
  35. GRB 080319D: Swift detection of a burst with a possible optical afterglow
  36. GRB 080319B: TORTORA synchronous observation
  37. GRB 080319B: Enhanced Swift-XRT position
  38. GRB 080319A: Enhanced Swift-XRT position
  39. GRB 080319C: Swift detection of a burst with an optical afterglow
  40. GRB 080319A: REM observations
  41. GRB 080319B: Change in power law decay index
  42. GRB 080319A: optical observations at the NOT
  43. GRB 080319B: REM observations
  44. GRB080319A: P60 Optical Afterglow Observations
  45. GRB 080319B: Swift detection of an intense burst with a bright optical counterpart
  46. GRB 080319A: Swift detection of a burst
  47. GRB080310, LBT and MDM photometry
  48. GRB080315: Bok Optical Observations
  49. Swift/UVOT observations of GRB 080315
  50. Swift trigger 306323: Swift-BAT/XRT refined analysis
  51. GRB 080315: Optical observations
  52. GRB 080315: TAROT Calern observatory optical observations
  53. GRB 080315: Swift detection of a possible burst
  54. GRB 080307: GAO 150cm telescope Optical Observation
  55. GRB 080229A: GAO 150cm telescope Optical Observation
  56. GRB 080310, Swift-BAT refined analysis
  57. GRB 080310: Swift/UVOT Refined Analysis
  58. GRB 080310 - SDSS Pre-Burst Observations
  59. GRB 080310: Enhanced Swift-XRT position
  60. GRB 080310: RRM optical photometry with the VLT
  61. GRB 080310: REM observations
  62. GRB 080310: Swift detection of a burst with optical afterglow
  63. GRB080307, optical upper limit
  64. GRB080229, optical upper limit
  65. GRB 080307: Swift-XRT Team refined analysis
  66. GRB 080307: Swift/UVOT Upper Limits
  67. GRB 080307, Swift-BAT refined analysis
  68. GRB080307 - SDSS Pre-Burst Observations
  69. GRB 080307: TNT optical observation
  70. GRB080307: Optical upper limits
  71. GRB 080307: Gemini-N i-band observations - candidate afterglow
  72. GRB 080307: Enhanced Swift-XRT position
  73. GRB 080307, Preliminary Swift-BAT refined analysis
  74. GRB 080307: Optical observation with DMC/KANATA
  75. GRB 080307: Swift detection of a burst
  76. VLA possible radio detection of GRB 080229
  77. GRB080303: Swift XRT refined analysis
  78. GRB 080303: Enhanced Swift-XRT position
  79. Swift UVOT observations of GRB080229B
  80. GRB 080303: Swift detection of a burst with optical afterglow
  81. GRB 080303: REM NIR afterglow candidate
  82. GRB 080303A: ROTSE-III Optical Limits
  83. GRB 080229: I-band observations from OSN
  84. GRB 080229: VLT NIR observations
  85. GRB 080229: TNG NIR observations
  86. GRB 080229: Enhanced Swift-XRT position
  87. GRB 080229: REM NIR observations
  88. GRB080229: Possible optical afterglow
  89. UVOT analysis for GRB080229
  90. GRB 080229A: ROTSE-III Optical Limits
  91. GRB 080229: Swift detection of a bright burst
  92. GRB080205: optical observations
  93. XRF 080109/SN2008D : GMRT upper limit at 1.28 GHz
  94. GRB 071010B : Early optical brightening detected by TAOS
  95. Swift/UVOT observations of GRB080218B
  96. GRB 080218B: REM NIR early upper limits
  97. GRB 080218B: Enhanced Swift-XRT position
  98. GRB 080218B: GROND upper limits
  99. Swift-XRT and UVOT observations of the IPN burst GRB 080211
  100. GRB 080212: VLT optical rapid decay

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