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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"

27581 results found.

  1. GRB 070808 : Faulkes Telescope South Observations
  2. GRB 070808: Swift XRT refined analysis
  3. GRB 070808, Swift-BAT refined analysis
  4. GRB070808 - SDSS Pre-Burst Observations
  5. GRB 070808: ROTSE-III Optical Limits
  6. GRB 070808: Swift detection of a burst
  7. GRB070805 XRT and UVOT afterglow candidate
  8. Swift trigger on 4U 1700-377 while star tracker loss-of-lock
  9. Swift/UVOT observations of GRB070805
  10. GRB 070805, Swift-BAT refined analysis
  11. GRB 070805: Swift XRT initial analysis.
  12. GRB 070805: Swift/UVOT initial analysis
  13. GRB 070805: Swift detection of a burst
  14. UVOT observations of SAXJ1810.8-2609
  15. Swift detection of a outburst from SAX J1810.8-2609
  16. GRB 070802: Swift-XRT refined analysis
  17. GRB070802: Swift/UVOT upper limits
  18. GRB 070802, Swift-BAT refined analysis
  19. GRB 070802: GROND J band candidate
  20. GRB 070802: Swift detection of a burst
  21. GRB 070731, Swift-BAT refined analysis
  22. Konus-A observation of GRB 070729
  23. Swift/UVOT detection of GRB070714B
  24. Intense burst from SGR 1806-20 detected on July 27
  25. GRB070729: Swift/UVOT upper limits
  26. GRB 070729: Swift-XRT refined analysis
  27. GRB 070729, Swift-BAT refined analysis
  28. GRB 070729: Swift detection of a short hard burst
  29. GRB 070724B: Swift/UVOT Upper limits
  30. GRB070721A: Swift/UVOT Detection of a Weak Afterglow
  31. GRB 070721A: optical observations
  32. GRB 070724B: Swift-XRT afterglow candidates
  33. GRB 070724: optical observations
  34. Swift/UVOT refined analysis of GRB070724
  35. GRB 070724: Swift-XRT Team refined analysis
  36. GRB 070724, Swift-BAT refined analysis of a short burst
  37. GRB 070721B: further observations and analysis
  38. GRB 070724: Swift detection of a burst
  39. GRB 070326: Detection of first burst from BAT Slew Survey (BATSS)
  40. Swift/UVOT observations of GRB070721B optical afterglow.
  41. GRB 070721B, Further Swift-BAT refined analysis
  42. Swift/UVOT Observations of GRB070721A
  43. GRB 070721B : Faulkes Telescope South observations
  44. GRB 070721B: Swift-XRT refined analysis
  45. GRB 070721A : Faulkes Telescope South optical limit
  46. GRB 070721A: Swift/XRT refined analysis
  47. GRB 070721B, Swift-BAT refined analysis
  48. GRB 070721A, Swift-BAT refined analysis
  49. GRB070721B: A bright UVOT candidate
  50. GRB 070721B: Swift detection of a burst
  51. GRB 070721: Swift detection of a possible burst
  52. GRB 070714B: Swift/BAT and Suzaku/WAM joint spectral analysis
  53. GRB 070714B : Suzaku WAM observation of the prompt emission
  54. GRB 070714A: Swift-BAT T_zero
  55. GRB 070714A: Swift/UVOT Upper limits
  56. GRB 070714B: Swift/UVOT Upper Limits
  57. GRB 070714B: Swift-BAT spectral lag for the SHB
  58. GRB 070714A: Swift XRT refined analysis
  59. GRB070714B: Swift-XRT refined analysis
  60. GRB 070707: Swift-XRT follow-up observations
  61. GRB 070714b ("Bastille"): Optical Pre-Imaging (Clarification)
  62. GRB 070714B, Swift-BAT refined analysis of the short hard burst
  63. GRB 070714A, Swift-BAT refined analysis
  64. GRB 070714 : Liverpool Telescope optical counterpart ?
  65. GRB 070714: Swift detection of a bright burst, possibly short
  66. Swift detection of a possible burst (Trigger 284850)
  67. GRB 070704: RTT150 optical observations
  68. GRB 070704: Suzaku/WAM observation of the prompt emission
  69. Swift/UVOT Observations of GRB070707
  70. Swift XRT observation of GRB 070707
  71. GRB 070707: VLT observations
  72. GRB 070429B: NIR Observations
  73. GRB070704: FAVOR optical observations
  74. GRB 070704 : Liverpool Telescope Observations
  75. GRB 070704: Swift-XRT refined analysis
  76. Swift/UVOT Observations of GRB070704
  77. GRB 070704, Swift-BAT refined analysis
  78. GRB 070704: Correction to GCN Circ 6594
  79. GRB 070704: Swift detection of a burst
  80. GRB 070626: Suzaku/WAM observation of the prompt emission
  81. GRB 070628 Swift-UVOT Refined Analysis
  82. GRB 070628: NIR detection of afterglow
  83. GRB 070628, Swift-BAT refined analysis
  84. GRB 070628: TAROT La Silla observatory optical observations
  85. GRB 070628: Swift XRT refined analysis
  86. GRB 070628: Watcher Observations
  87. Swift UVOT Observations of GRB 070628
  88. GRB 070628: Swift detection of a possible burst
  89. INTEGRAL burst GRB070615: X-ray continued observations
  90. GRB 070616 : WIDGET simultaneous optical observations
  91. GRB 070616: Suzaku/WAM observation of the prompt emission
  92. GRB 070621: Swift/UVOT Upper Limits
  93. Keck Laser Guide Star Adaptive Optics Imaging of GRB 070621
  94. GRB 070621: Swift-BAT refined analysis
  95. GRB070621: Swift XRT refined analysis
  96. GRB070621: OPTIMA-Burst optical upper limit
  97. GRB 070621: TAROT Calern observatory optical observations
  98. GRB 070621: Watcher Observations
  99. GRB 070621: ROTSE-III Prompt Optical Limits
  100. GRB 070621: Swift detection of a burst

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