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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"

19607 results found.

  1. GRB 070721B: Swift-XRT refined analysis
  2. GRB 070721A: Swift/XRT refined analysis
  3. GRB 070721B, Swift-BAT refined analysis
  4. GRB 070721A, Swift-BAT refined analysis
  5. GRB070721B: A bright UVOT candidate
  6. GRB 070721B: Swift detection of a burst
  7. GRB 070721: Swift detection of a possible burst
  8. GRB 070714B: Swift/BAT and Suzaku/WAM joint spectral analysis
  9. GRB 070714B : Suzaku WAM observation of the prompt emission
  10. GRB 070714A: Swift-BAT T_zero
  11. GRB 070714A: Swift/UVOT Upper limits
  12. GRB 070714B: Swift/UVOT Upper Limits
  13. GRB 070714B: Swift-BAT spectral lag for the SHB
  14. GRB 070714A: Swift XRT refined analysis
  15. GRB070714B: Swift-XRT refined analysis
  16. GRB 070707: Swift-XRT follow-up observations
  17. GRB 070714B, Swift-BAT refined analysis of the short hard burst
  18. GRB 070714A, Swift-BAT refined analysis
  19. GRB 070714: Swift detection of a bright burst, possibly short
  20. Swift detection of a possible burst (Trigger 284850)
  21. GRB 070704: Suzaku/WAM observation of the prompt emission
  22. Updated Swift/UVOT calibration
  23. GRB 070707: object inside XRT error circle
  24. Swift/UVOT Observations of GRB070707
  25. Swift XRT observation of GRB 070707
  26. GRB070704: FAVOR optical observations
  27. GRB 070704: Swift-XRT refined analysis
  28. Swift/UVOT Observations of GRB070704
  29. GRB 070704, Swift-BAT refined analysis
  30. GRB 070704: Correction to GCN Circ 6594
  31. GRB 070704: Swift detection of a burst
  32. GRB 070628 Swift-UVOT Refined Analysis
  33. GRB 070628: NIR detection of afterglow
  34. GRB 070628, Swift-BAT refined analysis
  35. GRB 070628: TAROT La Silla observatory optical observations
  36. GRB 070628: Swift XRT refined analysis
  37. GRB 070628: Watcher Observations
  38. Swift UVOT Observations of GRB 070628
  39. GRB 070628: Swift detection of a possible burst
  40. INTEGRAL burst GRB070615: X-ray continued observations
  41. GRB 070616 : WIDGET simultaneous optical observations
  42. GRB 070616: Suzaku/WAM observation of the prompt emission
  43. GRB 070621: Swift/UVOT Upper Limits
  44. GRB 070621: Swift-BAT refined analysis
  45. GRB070621: Swift XRT refined analysis
  46. GRB 070621: UVOT-enhanced XRT position
  47. GRB070621: OPTIMA-Burst optical upper limit
  48. GRB 070621: TAROT Calern observatory optical observations
  49. GRB 070621: Watcher Observations
  50. GRB 070621: ROTSE-III Prompt Optical Limits
  51. GRB 070621: Swift detection of a burst
  52. GMRT upper limit of GRB 070610/SWIFT J195509.6+261406 in 610 MHz
  53. Swift/UVOT detection of GRB070616 optical afterglow.
  54. GRB 070616, Swift-BAT further refined analysis
  55. GRB 070616: Swift XRT refined circular
  56. GRB 070616: BTA optical observations
  57. Swift/UVOT observations of GRB070616
  58. GRB 070616: TLS observation
  59. Swift XRT observations of the INTEGRAL burst GRB070615: Possible
  60. GRB 070616, Swift-BAT partial refined analysis
  61. GRB 070616: Swift detection of a burst
  62. UVOT Observations of INTEGRAL burst GRB070615
  63. SWIFT J195509.6+261406 (GRB 070610): further observations
  64. GRB 070612A: Rapid Decay
  65. GRB 070612A: Suzaku/WAM observation of the prompt emission
  66. SWIFT J195509.6+261406 / GRB 070610: OPTIMA-Burst observations
  67. GRB 070611: Watcher Observations
  68. Swift Trigger 282176 is Cygnus X-1
  69. GRB 070612A: MDM Observations
  70. GRB 070612B, Swift-BAT refined analysis
  71. GRB 070612A, Swift-BAT refined analysis
  72. GRB 070612B: Swift-XRT refined analysis
  73. SWIFT J195509.6+261406 / GRB 070610: SWIFT continued observations
  74. GRB 070612B: Swift/UVOT upper limits
  75. GRB 070612B: FRAM limit
  76. GRB 070612B: KAIT limits
  77. GRB 070612B: Swift XRT position from downlink data
  78. GRB 070610: TAROT Calern observatory optical observations
  79. GRB 070612B: Swift detection of a burst
  80. GRB 070612: Swift detection of a burst
  81. GRB 070610: Swift-XRT refined analysis
  82. GRB 070610: TLS RRM sees flaring behaviour - Galactic transient?
  83. GRB 070611: Swift/UVOT Observations
  84. GRB 070611: Swift-XRT refined analysis
  85. GRB 070611, Swift-BAT refined analysis
  86. GRB 070610: Watcher Observations
  87. GRB 070611: ROTSE-III Detection of Late Rising Optical Counterpart
  88. GRB 070611; Swift-XRT position
  89. GRB 070611: ROTSE-III Optical Limits
  90. GRB 070611: Swift detection of a burst
  91. GRB 070610: Swift-UVOT Upper Limits
  92. GRB 070610: OPTIMA-Burst high-time-resolution optical observations
  93. GRB 070610, Swift-BAT refined analysis
  94. GRB 070610; Swift-XRT position
  95. GRB 070610: Swift detection of a burst
  96. GRB 070412: TAROT Calern observatory optical observations
  97. GRB 070411: TAROT Calern observatory optical observations
  98. Swift/UVOT refined analysis of GRB070531
  99. GRB 070531: Swift-BAT refined analysis
  100. GRB 070531: Swift-XRT position

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