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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"

19605 results found.

  1. GRB 070419B: optical afterglow candidate
  2. GRB070419A, optical observation
  3. GRB070330: Correction to UVOT position
  4. GRB 070419B: Swift detection of a burst
  5. GRB 070419A: ROTSE-III Optical Limits
  6. GRB 070419: Swift detection of a burst
  7. Swift-BAT Trigger 276045 is a Cosmic Ray Shower event
  8. Trigger 276045: Swift detection of a possible burst
  9. GRB 070406: Swift XRT refined analysis
  10. GRB 070411: TLS data shows plateau, flares
  11. GRB070412: Swift UVOT observations
  12. GRB 070411: Swift/UVOT observations
  13. GRB 070412, Swift-BAT refined analysis
  14. GRB 070412: Swift-XRT refined analysis
  15. GRB 070411: Swift-XRT refined analysis
  16. GRB 070412: Optical observations at Crni Vrh
  17. GRB 070412: Swift-XRT refined position
  18. GRB 070411, Swift-BAT refined analysis
  19. GRB 070412: Swift detection of a burst
  20. GRB 070411: ROTSE-III Detection of Optical Counterpart
  21. GRB 070411: Tautenburg RRM Afterglow Confirmation
  22. GRB 070411: Swift detection of a burst with optical afterglow
  23. GRB 070406: Swift XRT team further analysis
  24. GRB 070406: Astrometrically Refined XRT Position, Unfading Source
  25. GRB 070406, Swift-BAT refined analysis
  26. GRB070406: Swift UVOT observations
  27. GRB 070406: Swift XRT Team analysis - Possible X-ray counterpart
  28. GRB 070406: SARA upper limit
  29. GRB 070406: Xinglong TNT optical Upper Limit
  30. GRB 070406: Swift detection of a burst
  31. INTEGRAL ToO Observation of SGR1806-20
  32. UVOT observations of GRB070330
  33. GRB 070330, Swift-BAT refined analysis
  34. GRB 070330: TAROT La Silla observatory optical observations
  35. GRB 070330: Swift-XRT refined analysis
  36. GRB 070330: Swift detection of a burst
  37. GRB 070328: pseudo-z~2.75 from spectral parameters of the prompt
  38. Konus-Wind observation of GRB 070328
  39. GRB 070328: Swift/UVOT Upper Limits
  40. GRB 070328: Swift/XRT Refined Analysis
  41. GRB 070328, Swift-BAT refined analysis
  42. GRB 070328: Swift detection of a burst
  43. GRB070318: Swift UVOT indicates unusual optical/UV afterglow
  44. GRB 070318: Gemini + Magellan spectra
  45. GRB070318: Swift UVOT continuing observations
  46. GRB070318: Swift-XRT refined analysis
  47. GRB 070318: Swift/UVOT Continued Observations
  48. GRB 070318, Swift-BAT refined analysis
  49. GRB 070318: Swift detection of a burst with an optical afterglow
  50. GRB 070311: Late Central Engine Activity Optical Flare??
  51. VLA observation of GRB 070311
  52. GRB 070309: variability of the XRT afterglow candidate
  53. GRB 070311: Swift/UVOT Upper Limits
  54. GRB 070311: Swift-XRT refined analysis
  55. GRB070309: Swift/XRT possible afterglow detection
  56. GRB 070125: Chandra X-ray Confirmation of Jet Break
  57. GRB 070309: Swift/UVOT Upper Limits
  58. Swift UVOT Finding Charts for GRB 070309
  59. GRB 070125: X-ray light curve analysis
  60. VLA observation of GRB 070306
  61. GRB 070306: NOT observations
  62. GRB 070306 Swift/UVOT refined analysis
  63. GRB 070306, Swift-BAT refined analysis
  64. GRB 070306: XRT Team Refined Analysis
  65. GRB070306 - SDSS Pre-burst Observations
  66. GRB 070306: Swift detection of a burst
  67. GRB070227: Swift-XRT refined analysis
  68. GRB 070125, deep late-time optical observation
  69. VLA observation of GRB 070224
  70. GRB 070227: optical observations
  71. GRB 070223: Optical Observations
  72. GRB 070227: optical observations
  73. GRB 070227: Swift/UVOT Upper Limits
  74. GRB 070227: TAROT La Silla observatory optical observations
  75. GRB 070227, Swift-BAT refined analysis
  76. GRB070227: possible X-ray afterglow detection
  77. GRB 070227: Swift detection of a burst in ground analysis
  78. GRB 070224: Optical afterglow confirmation
  79. GRB 070224: Swift/UVOT Upper Limits
  80. GRB070224: Swift-XRT Astrometrically Corrected Position
  81. VLA observation of GRB 070223
  82. VLA observation of GRB 070220
  83. GRB070224: Magellan Imaging Observations
  84. GRB070224: Gemini Imaging Observations
  85. GRB 070224: SARA upper limit
  86. GRB070224: Swift-XRT Refined Analysis
  87. GRB 070224, Swift-BAT refined analysis
  88. GRB 070224: MASTER-Net refind analysis
  89. GRB 070224: MASTER-VWF-Kislovodsk observations
  90. GRB 070224: Swift detection of a burst
  91. GRB070223: Swift/UVOT refined analysis
  92. GRB 070223, Swift-BAT refined analysis
  93. GRB070223: MASTER-VWF-Kislovodsk observations
  94. GRB 070223: Swift-XRT Refined Analysis
  95. GRB 070220: pseudo-z~2.15 from spectral parameters of the prompt
  96. GRB 070223: MDM Observations
  97. GRB070223: Swift burst
  98. Konus-Wind and Konus-A observations of GRB 070220
  99. GRB 070220 Swift-BAT Refined Analysis
  100. Swift/UVOT refined analysis of GRB070220

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