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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"

19625 results found.

  1. GRB 070729: Swift-XRT refined analysis
  2. GRB 070729, Swift-BAT refined analysis
  3. GRB 070729: Swift detection of a short hard burst
  4. GRB 070724B: Swift/UVOT Upper limits
  5. GRB070721A: Swift/UVOT Detection of a Weak Afterglow
  6. GRB 070724B: Swift-XRT afterglow likely candidate
  7. GRB 070724B: Swift-XRT afterglow candidates
  8. Four radio sources in Swift-XRT error box of GRB 070724
  9. GRB 060814 - Keck host detection and redshift
  10. Swift/UVOT refined analysis of GRB070724
  11. GRB 070724: Swift-XRT Team refined analysis
  12. GRB 070724, Swift-BAT refined analysis of a short burst
  13. GRB 070724: Swift detection of a burst
  14. GRB 070326: Detection of first burst from BAT Slew Survey (BATSS)
  15. GRB 070714B: Keck observations
  16. Swift/UVOT observations of GRB070721B optical afterglow.
  17. GRB 070721B, Further Swift-BAT refined analysis
  18. Swift/UVOT Observations of GRB070721A
  19. GRB 070721B: Swift-XRT refined analysis
  20. GRB 070721A: Swift/XRT refined analysis
  21. GRB 070721B, Swift-BAT refined analysis
  22. GRB 070721A, Swift-BAT refined analysis
  23. GRB070721B: A bright UVOT candidate
  24. GRB 070721B: Swift detection of a burst
  25. GRB 070721: Swift detection of a possible burst
  26. GRB 070714B: Swift/BAT and Suzaku/WAM joint spectral analysis
  27. GRB 070714B : Suzaku WAM observation of the prompt emission
  28. GRB 070714A: Swift-BAT T_zero
  29. GRB 070714A: Swift/UVOT Upper limits
  30. GRB 070714B: Swift/UVOT Upper Limits
  31. GRB 070714B: Swift-BAT spectral lag for the SHB
  32. GRB 070714A: Swift XRT refined analysis
  33. GRB070714B: Swift-XRT refined analysis
  34. GRB 070707: Swift-XRT follow-up observations
  35. GRB 070714B, Swift-BAT refined analysis of the short hard burst
  36. GRB 070714A, Swift-BAT refined analysis
  37. GRB 070714: Swift detection of a bright burst, possibly short
  38. Swift detection of a possible burst (Trigger 284850)
  39. GRB 070704: Suzaku/WAM observation of the prompt emission
  40. Updated Swift/UVOT calibration
  41. GRB 070707: object inside XRT error circle
  42. Swift/UVOT Observations of GRB070707
  43. Swift XRT observation of GRB 070707
  44. GRB070704: FAVOR optical observations
  45. GRB 070704: Swift-XRT refined analysis
  46. Swift/UVOT Observations of GRB070704
  47. GRB 070704, Swift-BAT refined analysis
  48. GRB 070704: Correction to GCN Circ 6594
  49. GRB 070704: Swift detection of a burst
  50. GRB 070628 Swift-UVOT Refined Analysis
  51. GRB 070628: NIR detection of afterglow
  52. GRB 070628, Swift-BAT refined analysis
  53. GRB 070628: TAROT La Silla observatory optical observations
  54. GRB 070628: Swift XRT refined analysis
  55. GRB 070628: Watcher Observations
  56. Swift UVOT Observations of GRB 070628
  57. GRB 070628: Swift detection of a possible burst
  58. INTEGRAL burst GRB070615: X-ray continued observations
  59. GRB 070616 : WIDGET simultaneous optical observations
  60. GRB 070616: Suzaku/WAM observation of the prompt emission
  61. GRB 070621: Swift/UVOT Upper Limits
  62. GRB 070621: Swift-BAT refined analysis
  63. GRB070621: Swift XRT refined analysis
  64. GRB 070621: UVOT-enhanced XRT position
  65. GRB070621: OPTIMA-Burst optical upper limit
  66. GRB 070621: TAROT Calern observatory optical observations
  67. GRB 070621: Watcher Observations
  68. GRB 070621: ROTSE-III Prompt Optical Limits
  69. GRB 070621: Swift detection of a burst
  70. GMRT upper limit of GRB 070610/SWIFT J195509.6+261406 in 610 MHz
  71. Swift/UVOT detection of GRB070616 optical afterglow.
  72. GRB 070616, Swift-BAT further refined analysis
  73. GRB 070616: Swift XRT refined circular
  74. GRB 070616: BTA optical observations
  75. Swift/UVOT observations of GRB070616
  76. GRB 070616: TLS observation
  77. Swift XRT observations of the INTEGRAL burst GRB070615: Possible
  78. GRB 070616, Swift-BAT partial refined analysis
  79. GRB 070616: Swift detection of a burst
  80. UVOT Observations of INTEGRAL burst GRB070615
  81. SWIFT J195509.6+261406 (GRB 070610): further observations
  82. GRB 070612A: Rapid Decay
  83. GRB 070612A: Suzaku/WAM observation of the prompt emission
  84. SWIFT J195509.6+261406 / GRB 070610: OPTIMA-Burst observations
  85. GRB 070611: Watcher Observations
  86. Swift Trigger 282176 is Cygnus X-1
  87. GRB 070612A: MDM Observations
  88. GRB 070612B, Swift-BAT refined analysis
  89. GRB 070612A, Swift-BAT refined analysis
  90. GRB 070612B: Swift-XRT refined analysis
  91. SWIFT J195509.6+261406 / GRB 070610: SWIFT continued observations
  92. GRB 070612B: Swift/UVOT upper limits
  93. GRB 070612B: FRAM limit
  94. GRB 070612B: KAIT limits
  95. GRB 070612B: Swift XRT position from downlink data
  96. GRB 070610: TAROT Calern observatory optical observations
  97. GRB 070612B: Swift detection of a burst
  98. GRB 070612: Swift detection of a burst
  99. GRB 070610: Swift-XRT refined analysis
  100. GRB 070610: TLS RRM sees flaring behaviour - Galactic transient?

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