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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"

19663 results found.

  1. GRB 070809: Swift-XRT refined analysis
  2. GRB 070810: enhanced Swift-XRT position
  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. GCN Swift XRT update position notices and enhanced position circulars
  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. VLA non-detection of GRB 070721B
  26. GRB 070802: REM optical observations
  27. GRB 070724B: Swift-XRT afterglow confirmation
  28. GRB 070802: Swift-XRT refined analysis
  29. GRB070802: Swift/UVOT upper limits
  30. GRB 070802, Swift-BAT refined analysis
  31. GRB 070802: refined Swift XRT position
  32. GRB 070802: GROND J band candidate
  33. GRB 070802: Swift detection of a burst
  34. GRB 070731, Swift-BAT refined analysis
  35. Konus-A observation of GRB 070729
  36. Swift/UVOT detection of GRB070714B
  37. VLA upper limit on short hard burst GRB 070714B
  38. GRB070729: Swift/UVOT upper limits
  39. GRB 070729: Swift-XRT refined analysis
  40. GRB 070729, Swift-BAT refined analysis
  41. GRB 070729: Swift detection of a short hard burst
  42. GRB 070724B: Swift/UVOT Upper limits
  43. GRB070721A: Swift/UVOT Detection of a Weak Afterglow
  44. GRB 070724B: Swift-XRT afterglow likely candidate
  45. GRB 070724B: Swift-XRT afterglow candidates
  46. Four radio sources in Swift-XRT error box of GRB 070724
  47. GRB 060814 - Keck host detection and redshift
  48. Swift/UVOT refined analysis of GRB070724
  49. GRB 070724: Swift-XRT Team refined analysis
  50. GRB 070724, Swift-BAT refined analysis of a short burst
  51. GRB 070724: Swift detection of a burst
  52. GRB 070326: Detection of first burst from BAT Slew Survey (BATSS)
  53. GRB 070714B: Keck observations
  54. Swift/UVOT observations of GRB070721B optical afterglow.
  55. GRB 070721B, Further Swift-BAT refined analysis
  56. Swift/UVOT Observations of GRB070721A
  57. GRB 070721B: Swift-XRT refined analysis
  58. GRB 070721A: Swift/XRT refined analysis
  59. GRB 070721B, Swift-BAT refined analysis
  60. GRB 070721A, Swift-BAT refined analysis
  61. GRB070721B: A bright UVOT candidate
  62. GRB 070721B: Swift detection of a burst
  63. GRB 070721: Swift detection of a possible burst
  64. GRB 070714B: Swift/BAT and Suzaku/WAM joint spectral analysis
  65. GRB 070714B : Suzaku WAM observation of the prompt emission
  66. GRB 070714A: Swift-BAT T_zero
  67. GRB 070714A: Swift/UVOT Upper limits
  68. GRB 070714B: Swift/UVOT Upper Limits
  69. GRB 070714B: Swift-BAT spectral lag for the SHB
  70. GRB 070714A: Swift XRT refined analysis
  71. GRB070714B: Swift-XRT refined analysis
  72. GRB 070707: Swift-XRT follow-up observations
  73. GRB 070714B, Swift-BAT refined analysis of the short hard burst
  74. GRB 070714A, Swift-BAT refined analysis
  75. GRB 070714: Swift detection of a bright burst, possibly short
  76. Swift detection of a possible burst (Trigger 284850)
  77. GRB 070704: Suzaku/WAM observation of the prompt emission
  78. Updated Swift/UVOT calibration
  79. GRB 070707: object inside XRT error circle
  80. Swift/UVOT Observations of GRB070707
  81. Swift XRT observation of GRB 070707
  82. GRB070704: FAVOR optical observations
  83. GRB 070704: Swift-XRT refined analysis
  84. Swift/UVOT Observations of GRB070704
  85. GRB 070704, Swift-BAT refined analysis
  86. GRB 070704: Correction to GCN Circ 6594
  87. GRB 070704: Swift detection of a burst
  88. GRB 070628 Swift-UVOT Refined Analysis
  89. GRB 070628: NIR detection of afterglow
  90. GRB 070628, Swift-BAT refined analysis
  91. GRB 070628: TAROT La Silla observatory optical observations
  92. GRB 070628: Swift XRT refined analysis
  93. GRB 070628: Watcher Observations
  94. Swift UVOT Observations of GRB 070628
  95. GRB 070628: Swift detection of a possible burst
  96. INTEGRAL burst GRB070615: X-ray continued observations
  97. GRB 070616 : WIDGET simultaneous optical observations
  98. GRB 070616: Suzaku/WAM observation of the prompt emission
  99. GRB 070621: Swift/UVOT Upper Limits
  100. GRB 070621: Swift-BAT refined analysis

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