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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. GRB 070328, Swift-BAT refined analysis
  2. GRB 070328: Swift detection of a burst
  3. GRB070318: Swift UVOT indicates unusual optical/UV afterglow
  4. GRB 070318: Gemini + Magellan spectra
  5. GRB070318: Swift UVOT continuing observations
  6. GRB070318: Swift-XRT refined analysis
  7. GRB 070318: Swift/UVOT Continued Observations
  8. GRB 070318, Swift-BAT refined analysis
  9. GRB 070318: Swift detection of a burst with an optical afterglow
  10. GRB 070311: Late Central Engine Activity Optical Flare??
  11. VLA observation of GRB 070311
  12. GRB 070309: variability of the XRT afterglow candidate
  13. GRB 070311: Swift/UVOT Upper Limits
  14. GRB 070311: Swift-XRT refined analysis
  15. GRB070309: Swift/XRT possible afterglow detection
  16. GRB 070125: Chandra X-ray Confirmation of Jet Break
  17. GRB 070309: Swift/UVOT Upper Limits
  18. Swift UVOT Finding Charts for GRB 070309
  19. GRB 070125: X-ray light curve analysis
  20. VLA observation of GRB 070306
  21. GRB 070306: NOT observations
  22. GRB 070306 Swift/UVOT refined analysis
  23. GRB 070306, Swift-BAT refined analysis
  24. GRB 070306: XRT Team Refined Analysis
  25. GRB070306 - SDSS Pre-burst Observations
  26. GRB 070306: Swift detection of a burst
  27. GRB070227: Swift-XRT refined analysis
  28. GRB 070125, deep late-time optical observation
  29. VLA observation of GRB 070224
  30. GRB 070227: optical observations
  31. GRB 070223: Optical Observations
  32. GRB 070227: optical observations
  33. GRB 070227: Swift/UVOT Upper Limits
  34. GRB 070227: TAROT La Silla observatory optical observations
  35. GRB 070227, Swift-BAT refined analysis
  36. GRB070227: possible X-ray afterglow detection
  37. GRB 070227: Swift detection of a burst in ground analysis
  38. GRB 070224: Optical afterglow confirmation
  39. GRB 070224: Swift/UVOT Upper Limits
  40. GRB070224: Swift-XRT Astrometrically Corrected Position
  41. VLA observation of GRB 070223
  42. VLA observation of GRB 070220
  43. GRB070224: Magellan Imaging Observations
  44. GRB070224: Gemini Imaging Observations
  45. GRB 070224: SARA upper limit
  46. GRB070224: Swift-XRT Refined Analysis
  47. GRB 070224, Swift-BAT refined analysis
  48. GRB 070224: MASTER-Net refind analysis
  49. GRB 070224: MASTER-VWF-Kislovodsk observations
  50. GRB 070224: Swift detection of a burst
  51. GRB070223: Swift/UVOT refined analysis
  52. GRB 070223, Swift-BAT refined analysis
  53. GRB070223: MASTER-VWF-Kislovodsk observations
  54. GRB 070223: Swift-XRT Refined Analysis
  55. GRB 070220: pseudo-z~2.15 from spectral parameters of the prompt
  56. GRB 070223: MDM Observations
  57. GRB070223: Swift burst
  58. Konus-Wind and Konus-A observations of GRB 070220
  59. GRB 070220 Swift-BAT Refined Analysis
  60. Swift/UVOT refined analysis of GRB070220
  61. GRB 070209: Swift XRT refined analysis
  62. GRB 070220: Swift-XRT Refined Analysis
  63. GRB 070220: Swift detection of a burst
  64. GRB070219: MASTER-VWF-Kislovodsk observations
  65. GRB 070219: XRT Refined Analysis
  66. GRB 070219: Swift/UVOT Upper limits
  67. GRB 070219, Swift-BAT refined analysis
  68. GRB 070219: ROTSE-III Optical Limits
  69. GRB070219 - SDSS Pre-Burst Observations
  70. GRB 070219: Swift detection of a burst
  71. Swift-BAT trigger 260304 is NOT a burst or transient
  72. GRB 070209: Swift XRT analysis
  73. GRB 070208: MARGE Optical Observations
  74. IPN localization of very bright long hard GRB 070207
  75. IPN localization of very intense short GRB 070201
  76. GRB 070209, Swift-BAT refined analysis of the short hard burst
  77. GRB 070209: Swift detection of a short hard burst
  78. GRB 070208: Swift XRT refined analysis
  79. GRB 070208: RAPTOR detection of early afterglow onset
  80. GRB 070208: MDM Optical Decay
  81. GRB 070208, Swift-BAT refined analysis
  82. GRB070208: Faulkes Telescope North Afterglow Identification
  83. GRB 070208: ROTSE-III Optical Limits
  84. GRB 070208: MDM Observations
  85. GRB 070208: Swift detection of a burst
  86. Swift-BAT trigger 259527 is a Cosmic Ray Shower
  87. GRB070124: Swift-XRT Follow-up Observation
  88. GRB070126: Swift-XRT Observation
  89. GRB 070129: Swift/UVOT Upper limits
  90. GRB 070129: dust-scattered X-ray halo detected by Swift/XRT
  91. GRB061217: MAGIC telescope GeV observation
  92. GRB 070129, Swift-BAT refined analysis of a particularly long
  93. GRB 070129: Swift-XRT Refined Analysis
  94. GRB 070125: An IR Point Source and an Apparent Host Galaxy
  95. GRB 070129: Swift detection of a burst
  96. GRB 070126: Swift/UVOT refined analysis
  97. GRB070126: Swift-XRT possible detection of an afterglow
  98. GRB 070125: UVOT Detection in Ultraviolet Filters
  99. GRB 070126, Swift-BAT refined analysis of a very faint burst
  100. GRB070124: Swift-XRT Observation

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