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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"

19670 results found.

  1. GRB 070809: Swift/UVOT Upper Limits
  2. GRB 070810B: Swift detection of a short burst
  3. VLA upper limit on the short hard burst GRB 070729
  4. No radio detection in superAGILE burst 070724B
  5. GRB 070810: Swift-XRT Team Refined Analysis
  6. GRB 070809: Swift-XRT refined analysis
  7. GRB 070810: enhanced Swift-XRT position
  8. GRB 070810: Swift/UVOT Optical Counterpart
  9. GRB 070810: ROTSE-III Detection of Optical Counterpart
  10. GRB 070810: Swift detection of a burst
  11. GRB 070809, Swift-BAT refined analysis
  12. GRB 070808: Swift/UVOT upper limits
  13. GRB 070809: ROTSE-III Optical Limits
  14. GRB 070809: Swift detection of a short burst
  15. GCN Swift XRT update position notices and enhanced position circulars
  16. GRB 070808: Swift XRT refined analysis
  17. GRB 070808, Swift-BAT refined analysis
  18. GRB070808 - SDSS Pre-Burst Observations
  19. GRB 070808: ROTSE-III Optical Limits
  20. GRB 070808: Swift detection of a burst
  21. GRB070805 XRT and UVOT afterglow candidate
  22. Swift trigger on 4U 1700-377 while star tracker loss-of-lock
  23. Swift/UVOT observations of GRB070805
  24. GRB 070805, Swift-BAT refined analysis
  25. GRB 070805: Swift XRT initial analysis.
  26. GRB 070805: Swift/UVOT initial analysis
  27. GRB 070805: Swift detection of a burst
  28. UVOT observations of SAXJ1810.8-2609
  29. Swift detection of a outburst from SAX J1810.8-2609
  30. VLA non-detection of GRB 070721B
  31. GRB 070802: REM optical observations
  32. GRB 070724B: Swift-XRT afterglow confirmation
  33. GRB 070802: Swift-XRT refined analysis
  34. GRB070802: Swift/UVOT upper limits
  35. GRB 070802, Swift-BAT refined analysis
  36. GRB 070802: refined Swift XRT position
  37. GRB 070802: GROND J band candidate
  38. GRB 070802: Swift detection of a burst
  39. GRB 070731, Swift-BAT refined analysis
  40. Konus-A observation of GRB 070729
  41. Swift/UVOT detection of GRB070714B
  42. VLA upper limit on short hard burst GRB 070714B
  43. GRB070729: Swift/UVOT upper limits
  44. GRB 070729: Swift-XRT refined analysis
  45. GRB 070729, Swift-BAT refined analysis
  46. GRB 070729: Swift detection of a short hard burst
  47. GRB 070724B: Swift/UVOT Upper limits
  48. GRB070721A: Swift/UVOT Detection of a Weak Afterglow
  49. GRB 070724B: Swift-XRT afterglow likely candidate
  50. GRB 070724B: Swift-XRT afterglow candidates
  51. Four radio sources in Swift-XRT error box of GRB 070724
  52. GRB 060814 - Keck host detection and redshift
  53. Swift/UVOT refined analysis of GRB070724
  54. GRB 070724: Swift-XRT Team refined analysis
  55. GRB 070724, Swift-BAT refined analysis of a short burst
  56. GRB 070724: Swift detection of a burst
  57. GRB 070326: Detection of first burst from BAT Slew Survey (BATSS)
  58. GRB 070714B: Keck observations
  59. Swift/UVOT observations of GRB070721B optical afterglow.
  60. GRB 070721B, Further Swift-BAT refined analysis
  61. Swift/UVOT Observations of GRB070721A
  62. GRB 070721B: Swift-XRT refined analysis
  63. GRB 070721A: Swift/XRT refined analysis
  64. GRB 070721B, Swift-BAT refined analysis
  65. GRB 070721A, Swift-BAT refined analysis
  66. GRB070721B: A bright UVOT candidate
  67. GRB 070721B: Swift detection of a burst
  68. GRB 070721: Swift detection of a possible burst
  69. GRB 070714B: Swift/BAT and Suzaku/WAM joint spectral analysis
  70. GRB 070714B : Suzaku WAM observation of the prompt emission
  71. GRB 070714A: Swift-BAT T_zero
  72. GRB 070714A: Swift/UVOT Upper limits
  73. GRB 070714B: Swift/UVOT Upper Limits
  74. GRB 070714B: Swift-BAT spectral lag for the SHB
  75. GRB 070714A: Swift XRT refined analysis
  76. GRB070714B: Swift-XRT refined analysis
  77. GRB 070707: Swift-XRT follow-up observations
  78. GRB 070714B, Swift-BAT refined analysis of the short hard burst
  79. GRB 070714A, Swift-BAT refined analysis
  80. GRB 070714: Swift detection of a bright burst, possibly short
  81. Swift detection of a possible burst (Trigger 284850)
  82. GRB 070704: Suzaku/WAM observation of the prompt emission
  83. Updated Swift/UVOT calibration
  84. GRB 070707: object inside XRT error circle
  85. Swift/UVOT Observations of GRB070707
  86. Swift XRT observation of GRB 070707
  87. GRB070704: FAVOR optical observations
  88. GRB 070704: Swift-XRT refined analysis
  89. Swift/UVOT Observations of GRB070704
  90. GRB 070704, Swift-BAT refined analysis
  91. GRB 070704: Correction to GCN Circ 6594
  92. GRB 070704: Swift detection of a burst
  93. GRB 070628 Swift-UVOT Refined Analysis
  94. GRB 070628: NIR detection of afterglow
  95. GRB 070628, Swift-BAT refined analysis
  96. GRB 070628: TAROT La Silla observatory optical observations
  97. GRB 070628: Swift XRT refined analysis
  98. GRB 070628: Watcher Observations
  99. Swift UVOT Observations of GRB 070628
  100. GRB 070628: Swift detection of a possible burst

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