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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"

28231 results found.

  1. GRB 070917: MITSuME Akeno Ic upper limit
  2. GRB 070917: R band observations
  3. GRB 070917, Swift-BAT refined analysis
  4. GRB 070911: Suzaku WAM observation of the prompt emission
  5. GRB 070913: Swift-XRT detection of the possible X-ray afterglow
  6. GRB 070809: The Swift evidence for the SHB nature of this burst
  7. GRB 070913: Afterglow candidate detected by TAROT La Silla observatory
  8. GRB 070913: Swift-BAT refined analysis
  9. GRB 070913: SMARTS optical/IR observations
  10. GRB 070913: TAROT La Silla observatory optical observations
  11. GRB 070911: PAIRITEL IR Observations
  12. GRB 070911: Swift XRT refined analysis
  13. GRB 070911, Swift-BAT refined analysis
  14. Intense burst from SGR 1806-20 detected on September 7
  15. GRB 070809: Confirmation of optical transient
  16. Candidate Orphan GRB Optical Transient in IC 4779
  17. Las Campanas observations of possible TAROT GRB transient near IC
  18. Orphan GRB candidate in IC 4779 at TAROT La Silla observatory
  19. GRB 070824 - Combined SuperAGILE/IPN Localization
  20. GRB 070731: Swift/UVOT Upper Limit
  21. GRB 070805: UVOT afterglow candidate retraction
  22. GRB 070810B : Faulkes Telescope South Observations
  23. GRB 070810A: Continued Keck Imaging
  24. GRB 070810B: Keck spectroscopy of possible host galaxies
  25. GRB070810B: Swift/UVOT Upper Limits
  26. GRB 070810B: XRT refined analysis
  27. GRB 070810B, Swift-BAT refined analysis
  28. Swift Trigger 287421: False trigger due to star tracker loss
  29. GRB 070810A: Swift-BAT refined analysis
  30. GRB 070810B: Xinglong TNT optical Upper Limit
  31. GRB070810B: Optical observations with KANATA
  32. A giant outburst from Cygnus X-1 detected by Konus-Wind and Suzaku-WAM
  33. GRB 070809: Swift/UVOT Upper Limits
  34. VLA upper limit on the short hard burst GRB 070729
  35. No radio detection in superAGILE burst 070724B
  36. GRB 070809: Keck Imaging
  37. GRB 070810: Swift-XRT Team Refined Analysis
  38. GRB 070809: Swift-XRT refined analysis
  39. GRB 070810: enhanced Swift-XRT position
  40. GRB 070810: Swift/UVOT Optical Counterpart
  41. GRB 070809, Swift-BAT refined analysis
  42. GRB 070808: Swift/UVOT upper limits
  43. GRB 070809: Swift detection of a short burst
  44. GRB 070808 : Faulkes Telescope South Observations
  45. GCN Swift XRT update position notices and enhanced position circulars
  46. GRB 070808: Swift XRT refined analysis
  47. GRB 070808, Swift-BAT refined analysis
  48. GRB 070808: OPTIMA-Burst optical upper limit
  49. GRB 070808: Xinglong TNT optical Upper Limit
  50. GRB070808: Optical observations with KANATA
  51. GRB070808 - SDSS Pre-Burst Observations
  52. GRB 070808: ROTSE-III Optical Limits
  53. GRB070805 XRT and UVOT afterglow candidate
  54. GRB070612A: Radio upper limit from GMRT
  55. GRB 070721B: correct afterglow position
  56. Swift/UVOT observations of GRB070805
  57. GRB 070805, Swift-BAT refined analysis
  58. UVOT observations of SAXJ1810.8-2609
  59. Swift detection of a outburst from SAX J1810.8-2609
  60. VLA non-detection of GRB 070721B
  61. GRB 070802: REM optical observations
  62. GRB 070802: Swift-XRT refined analysis
  63. GRB070802: Swift/UVOT upper limits
  64. GRB 070802, Swift-BAT refined analysis
  65. GRB 070802: V-band detection of the candidate afterglow
  66. GRB 070802: GROND J band candidate
  67. GRB 070731, Swift-BAT refined analysis
  68. Konus-A observation of GRB 070729
  69. Swift/UVOT detection of GRB070714B
  70. VLA upper limit on short hard burst GRB 070714B
  71. Intense burst from SGR 1806-20 detected on July 27
  72. GRB070729: Swift/UVOT upper limits
  73. GRB 070729: Swift-XRT refined analysis
  74. GRB 070729, Swift-BAT refined analysis
  75. GRB 070724B: P60 Observations
  76. GRB 070724B: Swift/UVOT Upper limits
  77. GRB 070724B: Swift-XRT afterglow likely candidate
  78. GRB 070721A: optical observations
  79. GRB 070724A: further VLT observations
  80. GRB 070724B: Suzaku WAM observation of the prompt emission
  81. GRB 070724B: Swift-XRT afterglow candidates
  82. Four radio sources in Swift-XRT error box of GRB 070724
  83. GRB 070724: P60 and Gemini Observations
  84. GRB 060814 - Keck host detection and redshift
  85. Swift/UVOT refined analysis of GRB070724
  86. GRB 070724: Swift-XRT Team refined analysis
  87. GRB 070724, Swift-BAT refined analysis of a short burst
  88. GRB 070721B: further observations and analysis
  89. GRB 070724: Swift detection of a burst
  90. GRB 070326: Detection of first burst from BAT Slew Survey (BATSS)
  91. GRB 070714B: Keck observations
  92. GRB 070721B: optical observations and proposed redshift
  93. GRB 070721B, Further Swift-BAT refined analysis
  94. Swift/UVOT Observations of GRB070721A
  95. GRB 070721B : Faulkes Telescope South observations
  96. GRB 070721B: Swift-XRT refined analysis
  97. GRB 070721A : Faulkes Telescope South optical limit
  98. GRB 070721A: Swift/XRT refined analysis
  99. GRB 070721B, Swift-BAT refined analysis
  100. GRB 070721A, Swift-BAT refined analysis

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