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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"

27116 results found.

  1. INTEGRAL burst GRB070615: X-ray continued observations
  2. GRB 070616 : WIDGET simultaneous optical observations
  3. GRB 070616: Suzaku/WAM observation of the prompt emission
  4. GRB 070621: Swift/UVOT Upper Limits
  5. Keck Laser Guide Star Adaptive Optics Imaging of GRB 070621
  6. GRB 070621: Swift-BAT refined analysis
  7. GRB070621: Swift XRT refined analysis
  8. GRB070621: OPTIMA-Burst optical upper limit
  9. GRB 070621: TAROT Calern observatory optical observations
  10. GRB 070621: Watcher Observations
  11. GRB 070621: ROTSE-III Prompt Optical Limits
  12. GRB 070621: Swift detection of a burst
  13. Swift/UVOT detection of GRB070616 optical afterglow.
  14. GRB070616: Optical Observation by MITSuME Akeno
  15. GRB 070612B: Optical Observation by MITSuME Akeno
  16. Swift/UVOT observations of GRB070616
  17. Swift XRT observations of the INTEGRAL burst GRB070615: Possible
  18. GRB 070616, Swift-BAT partial refined analysis
  19. GRB 070616: Swift detection of a burst
  20. UVOT Observations of INTEGRAL burst GRB070615
  21. GRB 070615
  22. GRB 070612A: Super-LOTIS observations
  23. GRB 070612A: Suzaku/WAM observation of the prompt emission
  24. GRB 070612A: continued SARA observations
  25. GRB 070611: Watcher Observations
  26. Swift Trigger 282176 is Cygnus X-1
  27. GRB 070612B: SARA upper limit
  28. GRB 070612B, Swift-BAT refined analysis
  29. GRB 070612A, Swift-BAT refined analysis
  30. SWIFT J195509.6+261406 / GRB 070610: SWIFT continued observations
  31. GRB 070612B: Swift/UVOT upper limits
  32. GRB 070612B: KAIT limits
  33. GRB 070612A: SARA detection of possible OT
  34. GRB 070612B: Swift XRT position from downlink data
  35. GRB 070610: TAROT Calern observatory optical observations
  36. GRB 070612B: Swift detection of a burst
  37. GRB070612 - SDSS Pre-Burst Observations
  38. GRB 070612: Swift detection of a burst
  39. GRB 070610: SARA upper limit
  40. GRB 070610: Swift-XRT refined analysis
  41. GRB 070610: TLS RRM sees flaring behaviour - Galactic transient?
  42. GRB 070611: Swift/UVOT Observations
  43. GRB 070611, Swift-BAT refined analysis
  44. GRB 070610: Watcher Observations
  45. GRB 070611: ROTSE-III Detection of Late Rising Optical Counterpart
  46. GRB 070611; Swift-XRT position
  47. GRB 070611: ROTSE-III Optical Limits
  48. GRB 070611: Swift detection of a burst
  49. GRB 070610: Swift-UVOT Upper Limits
  50. GRB 070610, Swift-BAT refined analysis
  51. GRB 070610; Swift-XRT position
  52. GRB 070610: Swift detection of a burst
  53. GRB 070412: TAROT Calern observatory optical observations
  54. GRB 070411: TAROT Calern observatory optical observations
  55. Swift/UVOT refined analysis of GRB070531
  56. GRB 070531: Swift-BAT refined analysis
  57. GRB 070531: Swift-XRT position
  58. GRB 070531: Liverpool Telescope Optical Observations
  59. GRB 070531: Swift detection of a burst
  60. Swift/UVOT refined analysis of GRB070529
  61. GRB 070529: MARGE Observations
  62. GRB 070529: Optical aterglow from MIRO
  63. GRB 070529, Swift-BAT refined analysis
  64. GRB 070529: Swift detection of a burst with an optical aterglow
  65. GRB 070412: Deep Keck imaging
  66. Swift Triggers 280447, 280450 and 280451 are invalid
  67. Swift trigger 280447 is probably a Galactic transient
  68. GRB 070518: MARGE Observations
  69. Konus-Wind observation of GRB 070521
  70. GRB070520B: NIR observations
  71. GRB 070521: Swift/UVOT Upper Limits
  72. GRB 070521, optical observation
  73. GROND upper limits of GRB 070521
  74. GRB 070520B: SARA upper limit
  75. GRB 070521: SARA upper limit
  76. GRB 070521: Subaru observations and possible host detection
  77. GRB070518: Optical/NIR observation
  78. GRB 070520B: Swift/UVOT Upper Limits
  79. GRB 070521, Swift-BAT refined analysis
  80. GRB 070520A: Swift UVOT Upper Limits
  81. GRB 070520B: Swift-XRT refined analysis
  82. GRB 070521: optical limit by Pi of the Sky
  83. GRB070521 : Faulkes Telescope North Observations
  84. GRB 070521: TAROT La Silla observatory optical observations
  85. GRB070521 - SDSS Pre-Burst Observations
  86. GRB 070521: Swift detection of a burst
  87. GRB 070520A: MITSuME Akeno optical upper limits
  88. GRB 070520B, Swift-BAT refined analysis
  89. GRB 070520A, Swift-BAT refined analysis
  90. GRB 070520B: Swift detection of a burst
  91. GRB 070520: Swift detection of a burst
  92. GRB070518: UVOT refined analysis
  93. GRB 070518, Swift-BAT refined analysis
  94. GRB 070518: Swift detection of a burst with optical afterglow
  95. GRB070517: Swift-XRT Refined Analysis
  96. GRB 070517, Swift-BAT refined analysis
  97. GRB 070517: Swift detection of a burst
  98. GRB 070509: Swift/UVOT Upper Limits
  99. Konus-Wind and Konus-A observation of GRB 070508
  100. Swift-BAT trigger 278987 is not a GRB

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