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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"

19668 results found.

  1. No radio detection in superAGILE burst 070724B
  2. GRB 070810: Swift-XRT Team Refined Analysis
  3. GRB 070809: Swift-XRT refined analysis
  4. GRB 070810: enhanced Swift-XRT position
  5. GRB 070810: Swift/UVOT Optical Counterpart
  6. GRB 070810: ROTSE-III Detection of Optical Counterpart
  7. GRB 070810: Swift detection of a burst
  8. GRB 070809, Swift-BAT refined analysis
  9. GRB 070808: Swift/UVOT upper limits
  10. GRB 070809: ROTSE-III Optical Limits
  11. GRB 070809: Swift detection of a short burst
  12. GCN Swift XRT update position notices and enhanced position circulars
  13. GRB 070808: Swift XRT refined analysis
  14. GRB 070808, Swift-BAT refined analysis
  15. GRB070808 - SDSS Pre-Burst Observations
  16. GRB 070808: ROTSE-III Optical Limits
  17. GRB 070808: Swift detection of a burst
  18. GRB070805 XRT and UVOT afterglow candidate
  19. Swift trigger on 4U 1700-377 while star tracker loss-of-lock
  20. Swift/UVOT observations of GRB070805
  21. GRB 070805, Swift-BAT refined analysis
  22. GRB 070805: Swift XRT initial analysis.
  23. GRB 070805: Swift/UVOT initial analysis
  24. GRB 070805: Swift detection of a burst
  25. UVOT observations of SAXJ1810.8-2609
  26. Swift detection of a outburst from SAX J1810.8-2609
  27. VLA non-detection of GRB 070721B
  28. GRB 070802: REM optical observations
  29. GRB 070724B: Swift-XRT afterglow confirmation
  30. GRB 070802: Swift-XRT refined analysis
  31. GRB070802: Swift/UVOT upper limits
  32. GRB 070802, Swift-BAT refined analysis
  33. GRB 070802: refined Swift XRT position
  34. GRB 070802: GROND J band candidate
  35. GRB 070802: Swift detection of a burst
  36. GRB 070731, Swift-BAT refined analysis
  37. Konus-A observation of GRB 070729
  38. Swift/UVOT detection of GRB070714B
  39. VLA upper limit on short hard burst GRB 070714B
  40. GRB070729: Swift/UVOT upper limits
  41. GRB 070729: Swift-XRT refined analysis
  42. GRB 070729, Swift-BAT refined analysis
  43. GRB 070729: Swift detection of a short hard burst
  44. GRB 070724B: Swift/UVOT Upper limits
  45. GRB070721A: Swift/UVOT Detection of a Weak Afterglow
  46. GRB 070724B: Swift-XRT afterglow likely candidate
  47. GRB 070724B: Swift-XRT afterglow candidates
  48. Four radio sources in Swift-XRT error box of GRB 070724
  49. GRB 060814 - Keck host detection and redshift
  50. Swift/UVOT refined analysis of GRB070724
  51. GRB 070724: Swift-XRT Team refined analysis
  52. GRB 070724, Swift-BAT refined analysis of a short burst
  53. GRB 070724: Swift detection of a burst
  54. GRB 070326: Detection of first burst from BAT Slew Survey (BATSS)
  55. GRB 070714B: Keck observations
  56. Swift/UVOT observations of GRB070721B optical afterglow.
  57. GRB 070721B, Further Swift-BAT refined analysis
  58. Swift/UVOT Observations of GRB070721A
  59. GRB 070721B: Swift-XRT refined analysis
  60. GRB 070721A: Swift/XRT refined analysis
  61. GRB 070721B, Swift-BAT refined analysis
  62. GRB 070721A, Swift-BAT refined analysis
  63. GRB070721B: A bright UVOT candidate
  64. GRB 070721B: Swift detection of a burst
  65. GRB 070721: Swift detection of a possible burst
  66. GRB 070714B: Swift/BAT and Suzaku/WAM joint spectral analysis
  67. GRB 070714B : Suzaku WAM observation of the prompt emission
  68. GRB 070714A: Swift-BAT T_zero
  69. GRB 070714A: Swift/UVOT Upper limits
  70. GRB 070714B: Swift/UVOT Upper Limits
  71. GRB 070714B: Swift-BAT spectral lag for the SHB
  72. GRB 070714A: Swift XRT refined analysis
  73. GRB070714B: Swift-XRT refined analysis
  74. GRB 070707: Swift-XRT follow-up observations
  75. GRB 070714B, Swift-BAT refined analysis of the short hard burst
  76. GRB 070714A, Swift-BAT refined analysis
  77. GRB 070714: Swift detection of a bright burst, possibly short
  78. Swift detection of a possible burst (Trigger 284850)
  79. GRB 070704: Suzaku/WAM observation of the prompt emission
  80. Updated Swift/UVOT calibration
  81. GRB 070707: object inside XRT error circle
  82. Swift/UVOT Observations of GRB070707
  83. Swift XRT observation of GRB 070707
  84. GRB070704: FAVOR optical observations
  85. GRB 070704: Swift-XRT refined analysis
  86. Swift/UVOT Observations of GRB070704
  87. GRB 070704, Swift-BAT refined analysis
  88. GRB 070704: Correction to GCN Circ 6594
  89. GRB 070704: Swift detection of a burst
  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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