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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"

29099 results found.

  1. GRB 060526: Continued emission for the Swift burst
  2. GRB 060526: Swift detection of a burst with x-ray and optical afterglow
  3. GRB 060522: Swift/UVOT Observations of the Optical Afterglow
  4. XMM-Newton observation of GRB060510b
  5. GRB 060522: Swift/XRT Team refined analysis
  6. GRB 060522: Swift-BAT Refined Analysis
  7. GRB 060522: Swift detection of a burst with possible optical afterglow
  8. GRB 060515: NIR observation
  9. GRB 060210: Jet Break in the XRT light curve
  10. GRB 060516: Refined analysis of the Swift-BAT burst
  11. GRB 060516: Swift detection of a burst
  12. GRB 060505 BAT refined analysis
  13. GRB 060515 BAT refined analysis
  14. GRB 060512: TAROT optical observation
  15. GRB 060515: Swift/XRT Team refined analysis
  16. GRB 060515: Swift/UVOT Upper Limits
  17. GRB 060515: Swift/XRT position
  18. GRB 060515: Super-LOTIS Observations
  19. GRB060515: Swift/UVOT initial observation
  20. GRB 060515: TAROT optical observation
  21. GRB 060515: ROTSE-III Optical Limits
  22. GRB 060515: Swift detection of a burst
  23. Swift/UVOT observations of GRB060512.
  24. GRB060512: Swift XRT Team refined analysis
  25. GRB 060512: Swift-BAT Refined Analysis
  26. GRB060512 Name Correction: LT Afterglow detection
  27. GRB060512: Liverpool Telescope Afterglow detection
  28. GRB 060512: Swift detection of a burst with an optical afterglow
  29. GRB 060510A: Swift/UVOT Detection of an Optical Afterglow
  30. Konus-Wind observation of GRB 060510A
  31. GRB 060510B: Swift/UVOT Upper Limits
  32. GRB 060510A: Refined analysis of the Swift-BAT burst
  33. GRB 060510B: Swift-BAT Refined Analysis
  34. GRB060510A: XRT refined analysis
  35. GRB060510B : Faulkes North Telescope detection
  36. GRB 060510B: Super-LOTIS Observations
  37. GRB 060510B: MDM Observations and candidate OT
  38. GRB 060510B: Swift detection of a burst
  39. GRB 060510: Swift detection of a burst with optical transient
  40. GRB 060507: BART limit
  41. GRB 060507: Final Refined analysis of the Swift-BAT burst
  42. GRB 060507: Swift-BAT Refined Analysis
  43. GRB 060507: Swift/UVOT Upper Limits
  44. GRB 060507: MDM Optical Upper Limit
  45. GRB060507: Swift XRT position
  46. GRB 060507: Swift detection of a burst
  47. GRB060505: Swift/UVOT Observations
  48. GRB 060505: Swift XRT afterglow canditate position
  49. GRB 060505: Swift-BAT detection of a weak burst
  50. GRB 060502B: Swift/UVOT upper limits
  51. GRB 060502A: Swift/UVOT source detection
  52. GRB 060429: Refined IPN error box and Konus-Wind spectrum
  53. GRB 060502B: MDM Optical Observation
  54. GRB 060502B: Refined analysis of the Swift-BAT short burst
  55. GRB 060502B: Xinglong optical observation
  56. GRB 060502B: Swift detection of a short burst
  57. GRB060502: Swift-XRT refined analysis
  58. GRB 060502: Swift-BAT refined analysis
  59. GRB 060502: APO Spectroscopic Observations
  60. GRB060501: Swift UVOT followup observations
  61. GRB060502: Super-LOTIS Observations
  62. GRB 060502: P60 Afterglow Confirmation
  63. GRB 060502: Swift detection of a burst with an optical counterpart
  64. GRB 060501: MDM Observations
  65. GRB060501: Super-LOTIS observations
  66. GRB060501: P60 imaging and afterglow candidate
  67. GRB 060501: Refined analysis of the Swift-BAT burst
  68. GRB 060501: ROTSE-III Optical Limits
  69. GRB 060501: Swift detection of a burst
  70. GRB060428B: possible detection of an optical counterpart by Swift/UVOT.
  71. GRB060428B: Swift XRT Team refined analysis
  72. GRB 060428B: Refined analysis of the Swift-BAT burst
  73. GRB 060428B: KAIT observations
  74. GRB060428A: Swift/UVOT observations.
  75. GRB060428B, optical observation
  76. GRB 060428A: Refined analysis of the Swift-BAT burst
  77. GRB060428A: Swift XRT Team refined analysis
  78. GRB 060428B: Swift detection of a burst
  79. GRB 060428: Swift detection of a burst
  80. GRB 060427: Swift/UVOT upper limits.
  81. GRB 060427: Refined analysis of the Swift-BAT burst
  82. GRB060427: Swift XRT Team refined analysis
  83. GRB060418: Swift XRT Team Further Refined Analysis
  84. GRB 060427, optical observation
  85. GRB 060427: Swift detection of a burst
  86. GRB 060424: Refined analysis of the Swift-BAT burst
  87. GRB 060424: Swift detection of a burst
  88. Swift-BAT detection of Mrk 421
  89. GRB060421: Swift/UVOT observations
  90. GRB 060421: Swift-BAT Refined Analysis
  91. GRB 060421: Swift-XRT refined analysis
  92. Konus-Wind observation of GRB 060418
  93. GRB(?)060421 : XRT position
  94. Possible GRB060421: BART limits
  95. GRB(?) 060421: Swift detection of a burst
  96. GRB 060418: JHKs PAIRITEL Observations of Afterglow
  97. GRB060418: Swift/UVOT Observations
  98. GRB 060418: FRAM early afterglow observation
  99. GRB 060418: Refined Analysis of the Swift-BAT burst
  100. VLT/UVES observations of GRB060418

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