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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"

19608 results found.

  1. GRB070419 - SDSS Pre-Burst Observations
  2. GRB 070419A: Faulkes Telescope North Optical Observations
  3. GRB 070419B optical afterglow candidate
  4. GRB 070419B: optical afterglow candidate
  5. GRB070419A, optical observation
  6. GRB070330: Correction to UVOT position
  7. GRB 070419B: Swift detection of a burst
  8. GRB 070419A: ROTSE-III Optical Limits
  9. GRB 070419: Swift detection of a burst
  10. Swift-BAT Trigger 276045 is a Cosmic Ray Shower event
  11. Trigger 276045: Swift detection of a possible burst
  12. GRB 070406: Swift XRT refined analysis
  13. GRB 070411: TLS data shows plateau, flares
  14. GRB070412: Swift UVOT observations
  15. GRB 070411: Swift/UVOT observations
  16. GRB 070412, Swift-BAT refined analysis
  17. GRB 070412: Swift-XRT refined analysis
  18. GRB 070411: Swift-XRT refined analysis
  19. GRB 070412: Optical observations at Crni Vrh
  20. GRB 070412: Swift-XRT refined position
  21. GRB 070411, Swift-BAT refined analysis
  22. GRB 070412: Swift detection of a burst
  23. GRB 070411: ROTSE-III Detection of Optical Counterpart
  24. GRB 070411: Tautenburg RRM Afterglow Confirmation
  25. GRB 070411: Swift detection of a burst with optical afterglow
  26. GRB 070406: Swift XRT team further analysis
  27. GRB 070406: Astrometrically Refined XRT Position, Unfading Source
  28. GRB 070406, Swift-BAT refined analysis
  29. GRB070406: Swift UVOT observations
  30. GRB 070406: Swift XRT Team analysis - Possible X-ray counterpart
  31. GRB 070406: SARA upper limit
  32. GRB 070406: Xinglong TNT optical Upper Limit
  33. GRB 070406: Swift detection of a burst
  34. INTEGRAL ToO Observation of SGR1806-20
  35. UVOT observations of GRB070330
  36. GRB 070330, Swift-BAT refined analysis
  37. GRB 070330: TAROT La Silla observatory optical observations
  38. GRB 070330: Swift-XRT refined analysis
  39. GRB 070330: Swift detection of a burst
  40. GRB 070328: pseudo-z~2.75 from spectral parameters of the prompt
  41. Konus-Wind observation of GRB 070328
  42. GRB 070328: Swift/UVOT Upper Limits
  43. GRB 070328: Swift/XRT Refined Analysis
  44. GRB 070328, Swift-BAT refined analysis
  45. GRB 070328: Swift detection of a burst
  46. GRB070318: Swift UVOT indicates unusual optical/UV afterglow
  47. GRB 070318: Gemini + Magellan spectra
  48. GRB070318: Swift UVOT continuing observations
  49. GRB070318: Swift-XRT refined analysis
  50. GRB 070318: Swift/UVOT Continued Observations
  51. GRB 070318, Swift-BAT refined analysis
  52. GRB 070318: Swift detection of a burst with an optical afterglow
  53. GRB 070311: Late Central Engine Activity Optical Flare??
  54. VLA observation of GRB 070311
  55. GRB 070309: variability of the XRT afterglow candidate
  56. GRB 070311: Swift/UVOT Upper Limits
  57. GRB 070311: Swift-XRT refined analysis
  58. GRB070309: Swift/XRT possible afterglow detection
  59. GRB 070125: Chandra X-ray Confirmation of Jet Break
  60. GRB 070309: Swift/UVOT Upper Limits
  61. Swift UVOT Finding Charts for GRB 070309
  62. GRB 070125: X-ray light curve analysis
  63. VLA observation of GRB 070306
  64. GRB 070306: NOT observations
  65. GRB 070306 Swift/UVOT refined analysis
  66. GRB 070306, Swift-BAT refined analysis
  67. GRB 070306: XRT Team Refined Analysis
  68. GRB070306 - SDSS Pre-burst Observations
  69. GRB 070306: Swift detection of a burst
  70. GRB070227: Swift-XRT refined analysis
  71. GRB 070125, deep late-time optical observation
  72. VLA observation of GRB 070224
  73. GRB 070227: optical observations
  74. GRB 070223: Optical Observations
  75. GRB 070227: optical observations
  76. GRB 070227: Swift/UVOT Upper Limits
  77. GRB 070227: TAROT La Silla observatory optical observations
  78. GRB 070227, Swift-BAT refined analysis
  79. GRB070227: possible X-ray afterglow detection
  80. GRB 070227: Swift detection of a burst in ground analysis
  81. GRB 070224: Optical afterglow confirmation
  82. GRB 070224: Swift/UVOT Upper Limits
  83. GRB070224: Swift-XRT Astrometrically Corrected Position
  84. VLA observation of GRB 070223
  85. VLA observation of GRB 070220
  86. GRB070224: Magellan Imaging Observations
  87. GRB070224: Gemini Imaging Observations
  88. GRB 070224: SARA upper limit
  89. GRB070224: Swift-XRT Refined Analysis
  90. GRB 070224, Swift-BAT refined analysis
  91. GRB 070224: MASTER-Net refind analysis
  92. GRB 070224: MASTER-VWF-Kislovodsk observations
  93. GRB 070224: Swift detection of a burst
  94. GRB070223: Swift/UVOT refined analysis
  95. GRB 070223, Swift-BAT refined analysis
  96. GRB070223: MASTER-VWF-Kislovodsk observations
  97. GRB 070223: Swift-XRT Refined Analysis
  98. GRB 070220: pseudo-z~2.15 from spectral parameters of the prompt
  99. GRB 070223: MDM Observations
  100. GRB070223: Swift burst

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