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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"

29093 results found.

  1. GRB 060522: Swift detection of a burst with possible optical afterglow
  2. GRB 060515: NIR observation
  3. GRB 060210: Jet Break in the XRT light curve
  4. GRB 060516: Refined analysis of the Swift-BAT burst
  5. GRB 060516: Swift detection of a burst
  6. GRB 060505 BAT refined analysis
  7. GRB 060515 BAT refined analysis
  8. GRB 060512: TAROT optical observation
  9. GRB 060515: Swift/XRT Team refined analysis
  10. GRB 060515: Swift/UVOT Upper Limits
  11. GRB 060515: Swift/XRT position
  12. GRB 060515: Super-LOTIS Observations
  13. GRB060515: Swift/UVOT initial observation
  14. GRB 060515: TAROT optical observation
  15. GRB 060515: ROTSE-III Optical Limits
  16. GRB 060515: Swift detection of a burst
  17. Swift/UVOT observations of GRB060512.
  18. GRB060512: Swift XRT Team refined analysis
  19. GRB 060512: Swift-BAT Refined Analysis
  20. GRB060512 Name Correction: LT Afterglow detection
  21. GRB060512: Liverpool Telescope Afterglow detection
  22. GRB 060512: Swift detection of a burst with an optical afterglow
  23. GRB 060510A: Swift/UVOT Detection of an Optical Afterglow
  24. Konus-Wind observation of GRB 060510A
  25. GRB 060510B: Swift/UVOT Upper Limits
  26. GRB 060510A: Refined analysis of the Swift-BAT burst
  27. GRB 060510B: Swift-BAT Refined Analysis
  28. GRB060510A: XRT refined analysis
  29. GRB060510B : Faulkes North Telescope detection
  30. GRB 060510B: Super-LOTIS Observations
  31. GRB 060510B: MDM Observations and candidate OT
  32. GRB 060510B: Swift detection of a burst
  33. GRB 060510: Swift detection of a burst with optical transient
  34. GRB 060507: BART limit
  35. GRB 060507: Final Refined analysis of the Swift-BAT burst
  36. GRB 060507: Swift-BAT Refined Analysis
  37. GRB 060507: Swift/UVOT Upper Limits
  38. GRB 060507: MDM Optical Upper Limit
  39. GRB060507: Swift XRT position
  40. GRB 060507: Swift detection of a burst
  41. GRB060505: Swift/UVOT Observations
  42. GRB 060505: Swift XRT afterglow canditate position
  43. GRB 060505: Swift-BAT detection of a weak burst
  44. GRB 060502B: Swift/UVOT upper limits
  45. GRB 060502A: Swift/UVOT source detection
  46. GRB 060429: Refined IPN error box and Konus-Wind spectrum
  47. GRB 060502B: MDM Optical Observation
  48. GRB 060502B: Refined analysis of the Swift-BAT short burst
  49. GRB 060502B: Xinglong optical observation
  50. GRB 060502B: Swift detection of a short burst
  51. GRB060502: Swift-XRT refined analysis
  52. GRB 060502: Swift-BAT refined analysis
  53. GRB 060502: APO Spectroscopic Observations
  54. GRB060501: Swift UVOT followup observations
  55. GRB060502: Super-LOTIS Observations
  56. GRB 060502: P60 Afterglow Confirmation
  57. GRB 060502: Swift detection of a burst with an optical counterpart
  58. GRB 060501: MDM Observations
  59. GRB060501: Super-LOTIS observations
  60. GRB060501: P60 imaging and afterglow candidate
  61. GRB 060501: Refined analysis of the Swift-BAT burst
  62. GRB 060501: ROTSE-III Optical Limits
  63. GRB 060501: Swift detection of a burst
  64. GRB060428B: possible detection of an optical counterpart by Swift/UVOT.
  65. GRB060428B: Swift XRT Team refined analysis
  66. GRB 060428B: Refined analysis of the Swift-BAT burst
  67. GRB 060428B: KAIT observations
  68. GRB060428A: Swift/UVOT observations.
  69. GRB060428B, optical observation
  70. GRB 060428A: Refined analysis of the Swift-BAT burst
  71. GRB060428A: Swift XRT Team refined analysis
  72. GRB 060428B: Swift detection of a burst
  73. GRB 060428: Swift detection of a burst
  74. GRB 060427: Swift/UVOT upper limits.
  75. GRB 060427: Refined analysis of the Swift-BAT burst
  76. GRB060427: Swift XRT Team refined analysis
  77. GRB060418: Swift XRT Team Further Refined Analysis
  78. GRB 060427, optical observation
  79. GRB 060427: Swift detection of a burst
  80. GRB 060424: Refined analysis of the Swift-BAT burst
  81. GRB 060424: Swift detection of a burst
  82. Swift-BAT detection of Mrk 421
  83. GRB060421: Swift/UVOT observations
  84. GRB 060421: Swift-BAT Refined Analysis
  85. GRB 060421: Swift-XRT refined analysis
  86. Konus-Wind observation of GRB 060418
  87. GRB(?)060421 : XRT position
  88. Possible GRB060421: BART limits
  89. GRB(?) 060421: Swift detection of a burst
  90. GRB 060418: JHKs PAIRITEL Observations of Afterglow
  91. GRB060418: Swift/UVOT Observations
  92. GRB 060418: FRAM early afterglow observation
  93. GRB 060418: Refined Analysis of the Swift-BAT burst
  94. VLT/UVES observations of GRB060418
  95. GRB060418: Swift XRT Team Refined Analysis
  96. GRB060418: Magellan/MIKE Spectroscopic Redshift
  97. GRB 060418: Swift detection of a burst with bright x-ray and optical afterglow
  98. SGR 1900+14: Refined analysis of the Swift-BAT outburst
  99. GRB060413: Swift/UVOT upper limits
  100. SGR 1900+14: Swift detection of an outburst

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