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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"

27590 results found.

  1. GRB 070810: Swift-XRT Team Refined Analysis
  2. GRB 070809: Swift-XRT refined analysis
  3. GRB 070810: Swift/UVOT Optical Counterpart
  4. GRB 070810: ROTSE-III Detection of Optical Counterpart
  5. GRB 070810: Swift detection of a burst
  6. GRB 070809, Swift-BAT refined analysis
  7. GRB 070808: Swift/UVOT upper limits
  8. GRB 070809: ROTSE-III Optical Limits
  9. GRB 070809: Swift detection of a short burst
  10. GRB 070808 : Faulkes Telescope South Observations
  11. GRB 070808: Swift XRT refined analysis
  12. GRB 070808, Swift-BAT refined analysis
  13. GRB070808 - SDSS Pre-Burst Observations
  14. GRB 070808: ROTSE-III Optical Limits
  15. GRB 070808: Swift detection of a burst
  16. GRB070805 XRT and UVOT afterglow candidate
  17. Swift trigger on 4U 1700-377 while star tracker loss-of-lock
  18. Swift/UVOT observations of GRB070805
  19. GRB 070805, Swift-BAT refined analysis
  20. GRB 070805: Swift XRT initial analysis.
  21. GRB 070805: Swift/UVOT initial analysis
  22. GRB 070805: Swift detection of a burst
  23. UVOT observations of SAXJ1810.8-2609
  24. Swift detection of a outburst from SAX J1810.8-2609
  25. GRB 070802: Swift-XRT refined analysis
  26. GRB070802: Swift/UVOT upper limits
  27. GRB 070802, Swift-BAT refined analysis
  28. GRB 070802: GROND J band candidate
  29. GRB 070802: Swift detection of a burst
  30. GRB 070731, Swift-BAT refined analysis
  31. Konus-A observation of GRB 070729
  32. Swift/UVOT detection of GRB070714B
  33. Intense burst from SGR 1806-20 detected on July 27
  34. GRB070729: Swift/UVOT upper limits
  35. GRB 070729: Swift-XRT refined analysis
  36. GRB 070729, Swift-BAT refined analysis
  37. GRB 070729: Swift detection of a short hard burst
  38. GRB 070724B: Swift/UVOT Upper limits
  39. GRB070721A: Swift/UVOT Detection of a Weak Afterglow
  40. GRB 070721A: optical observations
  41. GRB 070724B: Swift-XRT afterglow candidates
  42. GRB 070724: optical observations
  43. Swift/UVOT refined analysis of GRB070724
  44. GRB 070724: Swift-XRT Team refined analysis
  45. GRB 070724, Swift-BAT refined analysis of a short burst
  46. GRB 070721B: further observations and analysis
  47. GRB 070724: Swift detection of a burst
  48. GRB 070326: Detection of first burst from BAT Slew Survey (BATSS)
  49. Swift/UVOT observations of GRB070721B optical afterglow.
  50. GRB 070721B, Further Swift-BAT refined analysis
  51. Swift/UVOT Observations of GRB070721A
  52. GRB 070721B : Faulkes Telescope South observations
  53. GRB 070721B: Swift-XRT refined analysis
  54. GRB 070721A : Faulkes Telescope South optical limit
  55. GRB 070721A: Swift/XRT refined analysis
  56. GRB 070721B, Swift-BAT refined analysis
  57. GRB 070721A, Swift-BAT refined analysis
  58. GRB070721B: A bright UVOT candidate
  59. GRB 070721B: Swift detection of a burst
  60. GRB 070721: Swift detection of a possible burst
  61. GRB 070714B: Swift/BAT and Suzaku/WAM joint spectral analysis
  62. GRB 070714B : Suzaku WAM observation of the prompt emission
  63. GRB 070714A: Swift-BAT T_zero
  64. GRB 070714A: Swift/UVOT Upper limits
  65. GRB 070714B: Swift/UVOT Upper Limits
  66. GRB 070714B: Swift-BAT spectral lag for the SHB
  67. GRB 070714A: Swift XRT refined analysis
  68. GRB070714B: Swift-XRT refined analysis
  69. GRB 070707: Swift-XRT follow-up observations
  70. GRB 070714b ("Bastille"): Optical Pre-Imaging (Clarification)
  71. GRB 070714B, Swift-BAT refined analysis of the short hard burst
  72. GRB 070714A, Swift-BAT refined analysis
  73. GRB 070714 : Liverpool Telescope optical counterpart ?
  74. GRB 070714: Swift detection of a bright burst, possibly short
  75. Swift detection of a possible burst (Trigger 284850)
  76. GRB 070704: RTT150 optical observations
  77. GRB 070704: Suzaku/WAM observation of the prompt emission
  78. Swift/UVOT Observations of GRB070707
  79. Swift XRT observation of GRB 070707
  80. GRB 070707: VLT observations
  81. GRB 070429B: NIR Observations
  82. GRB070704: FAVOR optical observations
  83. GRB 070704 : Liverpool Telescope Observations
  84. GRB 070704: Swift-XRT refined analysis
  85. Swift/UVOT Observations of GRB070704
  86. GRB 070704, Swift-BAT refined analysis
  87. GRB 070704: Correction to GCN Circ 6594
  88. GRB 070704: Swift detection of a burst
  89. GRB 070626: Suzaku/WAM observation of the prompt emission
  90. GRB 070628 Swift-UVOT Refined Analysis
  91. GRB 070628: NIR detection of afterglow
  92. GRB 070628, Swift-BAT refined analysis
  93. GRB 070628: TAROT La Silla observatory optical observations
  94. GRB 070628: Swift XRT refined analysis
  95. GRB 070628: Watcher Observations
  96. Swift UVOT Observations of GRB 070628
  97. GRB 070628: Swift detection of a possible burst
  98. INTEGRAL burst GRB070615: X-ray continued observations
  99. GRB 070616 : WIDGET simultaneous optical observations
  100. GRB 070616: Suzaku/WAM observation of the prompt emission

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