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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"

19662 results found.

  1. GRB 070810: enhanced Swift-XRT position
  2. GRB 070810: Swift/UVOT Optical Counterpart
  3. GRB 070810: ROTSE-III Detection of Optical Counterpart
  4. GRB 070810: Swift detection of a burst
  5. GRB 070809, Swift-BAT refined analysis
  6. GRB 070808: Swift/UVOT upper limits
  7. GRB 070809: ROTSE-III Optical Limits
  8. GRB 070809: Swift detection of a short burst
  9. GCN Swift XRT update position notices and enhanced position circulars
  10. GRB 070808: Swift XRT refined analysis
  11. GRB 070808, Swift-BAT refined analysis
  12. GRB070808 - SDSS Pre-Burst Observations
  13. GRB 070808: ROTSE-III Optical Limits
  14. GRB 070808: Swift detection of a burst
  15. GRB070805 XRT and UVOT afterglow candidate
  16. Swift trigger on 4U 1700-377 while star tracker loss-of-lock
  17. Swift/UVOT observations of GRB070805
  18. GRB 070805, Swift-BAT refined analysis
  19. GRB 070805: Swift XRT initial analysis.
  20. GRB 070805: Swift/UVOT initial analysis
  21. GRB 070805: Swift detection of a burst
  22. UVOT observations of SAXJ1810.8-2609
  23. Swift detection of a outburst from SAX J1810.8-2609
  24. VLA non-detection of GRB 070721B
  25. GRB 070802: REM optical observations
  26. GRB 070724B: Swift-XRT afterglow confirmation
  27. GRB 070802: Swift-XRT refined analysis
  28. GRB070802: Swift/UVOT upper limits
  29. GRB 070802, Swift-BAT refined analysis
  30. GRB 070802: refined Swift XRT position
  31. GRB 070802: GROND J band candidate
  32. GRB 070802: Swift detection of a burst
  33. GRB 070731, Swift-BAT refined analysis
  34. Konus-A observation of GRB 070729
  35. Swift/UVOT detection of GRB070714B
  36. VLA upper limit on short hard burst GRB 070714B
  37. GRB070729: Swift/UVOT upper limits
  38. GRB 070729: Swift-XRT refined analysis
  39. GRB 070729, Swift-BAT refined analysis
  40. GRB 070729: Swift detection of a short hard burst
  41. GRB 070724B: Swift/UVOT Upper limits
  42. GRB070721A: Swift/UVOT Detection of a Weak Afterglow
  43. GRB 070724B: Swift-XRT afterglow likely candidate
  44. GRB 070724B: Swift-XRT afterglow candidates
  45. Four radio sources in Swift-XRT error box of GRB 070724
  46. GRB 060814 - Keck host detection and redshift
  47. Swift/UVOT refined analysis of GRB070724
  48. GRB 070724: Swift-XRT Team refined analysis
  49. GRB 070724, Swift-BAT refined analysis of a short burst
  50. GRB 070724: Swift detection of a burst
  51. GRB 070326: Detection of first burst from BAT Slew Survey (BATSS)
  52. GRB 070714B: Keck observations
  53. Swift/UVOT observations of GRB070721B optical afterglow.
  54. GRB 070721B, Further Swift-BAT refined analysis
  55. Swift/UVOT Observations of GRB070721A
  56. GRB 070721B: Swift-XRT refined analysis
  57. GRB 070721A: Swift/XRT refined analysis
  58. GRB 070721B, Swift-BAT refined analysis
  59. GRB 070721A, Swift-BAT refined analysis
  60. GRB070721B: A bright UVOT candidate
  61. GRB 070721B: Swift detection of a burst
  62. GRB 070721: Swift detection of a possible burst
  63. GRB 070714B: Swift/BAT and Suzaku/WAM joint spectral analysis
  64. GRB 070714B : Suzaku WAM observation of the prompt emission
  65. GRB 070714A: Swift-BAT T_zero
  66. GRB 070714A: Swift/UVOT Upper limits
  67. GRB 070714B: Swift/UVOT Upper Limits
  68. GRB 070714B: Swift-BAT spectral lag for the SHB
  69. GRB 070714A: Swift XRT refined analysis
  70. GRB070714B: Swift-XRT refined analysis
  71. GRB 070707: Swift-XRT follow-up observations
  72. GRB 070714B, Swift-BAT refined analysis of the short hard burst
  73. GRB 070714A, Swift-BAT refined analysis
  74. GRB 070714: Swift detection of a bright burst, possibly short
  75. Swift detection of a possible burst (Trigger 284850)
  76. GRB 070704: Suzaku/WAM observation of the prompt emission
  77. Updated Swift/UVOT calibration
  78. GRB 070707: object inside XRT error circle
  79. Swift/UVOT Observations of GRB070707
  80. Swift XRT observation of GRB 070707
  81. GRB070704: FAVOR optical observations
  82. GRB 070704: Swift-XRT refined analysis
  83. Swift/UVOT Observations of GRB070704
  84. GRB 070704, Swift-BAT refined analysis
  85. GRB 070704: Correction to GCN Circ 6594
  86. GRB 070704: Swift detection of a burst
  87. GRB 070628 Swift-UVOT Refined Analysis
  88. GRB 070628: NIR detection of afterglow
  89. GRB 070628, Swift-BAT refined analysis
  90. GRB 070628: TAROT La Silla observatory optical observations
  91. GRB 070628: Swift XRT refined analysis
  92. GRB 070628: Watcher Observations
  93. Swift UVOT Observations of GRB 070628
  94. GRB 070628: Swift detection of a possible burst
  95. INTEGRAL burst GRB070615: X-ray continued observations
  96. GRB 070616 : WIDGET simultaneous optical observations
  97. GRB 070616: Suzaku/WAM observation of the prompt emission
  98. GRB 070621: Swift/UVOT Upper Limits
  99. GRB 070621: Swift-BAT refined analysis
  100. GRB070621: Swift XRT refined analysis

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