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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"

19663 results found.

  1. GRB 060522: Swift/XRT Team refined analysis
  2. GRB 060522: Swift-BAT Refined Analysis
  3. GRB 060522: Swift detection of a burst with possible optical afterglow
  4. GRB 060210: Jet Break in the XRT light curve
  5. GRB 060516: Refined analysis of the Swift-BAT burst
  6. GRB 060516: Swift detection of a burst
  7. GRB 060505 BAT refined analysis
  8. GRB 060515 BAT refined analysis
  9. GRB 060512: TAROT optical observation
  10. GRB 060515: Swift/XRT Team refined analysis
  11. GRB 060515: Swift/UVOT Upper Limits
  12. GRB 060515: Swift/XRT position
  13. GRB 060515: Super-LOTIS Observations
  14. GRB060515: Swift/UVOT initial observation
  15. GRB 060515: TAROT optical observation
  16. GRB 060515: ROTSE-III Optical Limits
  17. GRB 060515: Swift detection of a burst
  18. Swift/UVOT observations of GRB060512.
  19. GRB060512: Swift XRT Team refined analysis
  20. GRB 060512: Detection of NIR afterglow
  21. GRB 060512: Swift-BAT Refined Analysis
  22. GRB060512 Name Correction: LT Afterglow detection
  23. GRB060512: Liverpool Telescope Afterglow detection
  24. GRB 060512: Swift detection of a burst with an optical afterglow
  25. GRB 060510A: Swift/UVOT Detection of an Optical Afterglow
  26. GRB 060505: X-ray afterglow - Correction -
  27. GRB 060505: X-ray afterglow
  28. Konus-Wind observation of GRB 060510A
  29. GRB 060428a, SMARTS optical/IR afterglow detection
  30. GRB060510B: Swift XRT refined analysis
  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. GRB 060510B: Super-LOTIS Observations
  36. GRB 060510B: MDM Observations and candidate OT
  37. GRB 060510B: Swift detection of a burst
  38. GRB 060510: Swift detection of a burst with optical transient
  39. GRB060502B: improvement in the XRT afterglow position
  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: Swift XRT Team Refined Analysis
  45. GRB 060507: MDM Optical Upper Limit
  46. GRB060507: Swift XRT position
  47. GRB 060507: Swift detection of a burst
  48. GRB060505: Swift/UVOT Observations
  49. GRB 060505: Swift XRT Team Refined Analysis
  50. GRB 060505: Swift XRT afterglow canditate position
  51. GRB 060505: Swift-BAT detection of a weak burst
  52. GRB 060502B MDM Follow-up Observation
  53. GRB060502A, optical observation
  54. GRB 060502B: Swift/UVOT upper limits
  55. GRB 060502A: Swift/UVOT source detection
  56. GRB 060502B: MDM Optical Observation
  57. GRB 060502B: Refined analysis of the Swift-BAT short burst
  58. GRB060502B: Swift XRT Team refined analysis
  59. GRB060502B: correction to XRT position
  60. GRB 060502B: MASTER optical observations
  61. GRB 060502B: Swift detection of a short burst
  62. GRB060502: Swift-XRT refined analysis
  63. GRB 060502: Swift-BAT refined analysis
  64. GRB 060502: APO Spectroscopic Observations
  65. GRB060501: Swift UVOT followup observations
  66. GRB060502: Super-LOTIS Observations
  67. GRB 060502: Swift detection of a burst with an optical counterpart
  68. GRB 060501: MDM Observations
  69. GRB060501: Super-LOTIS observations
  70. GRB060501: P60 imaging and afterglow candidate
  71. GRB 060501: Refined analysis of the Swift-BAT burst
  72. GRB060501: Swift XRT position
  73. GRB 060501: ROTSE-III Optical Limits
  74. GRB 060501: Swift detection of a burst
  75. GRB060428B: optical observation
  76. GRB060428B: possible detection of an optical counterpart by Swift/UVOT.
  77. GRB 060428B: MDM Observations
  78. GRB060428B: Swift XRT Team refined analysis
  79. GRB 060427B: IPN localization of a short hard burst
  80. GRB 060428B: Refined analysis of the Swift-BAT burst
  81. GRB 060428B: KAIT observations
  82. GRB060428A: Swift/UVOT observations.
  83. GRB060428B, optical observation
  84. GRB 060428A: Refined analysis of the Swift-BAT burst
  85. GRB060428A: Swift XRT Team refined analysis
  86. GRB 060428B: Swift detection of a burst
  87. GRB 060428: Swift detection of a burst
  88. GRB 060427: NOT observations
  89. GRB 060427: Swift/UVOT upper limits.
  90. GRB 060427: Refined analysis of the Swift-BAT burst
  91. GRB060427: Swift XRT Team refined analysis
  92. GRB060418: Swift XRT Team Further Refined Analysis
  93. GRB 060427, optical observation
  94. GRB 060427: Swift detection of a burst
  95. GRB 060425: IPN localization and KW spectrum of a short, hard burst
  96. GRB 060424: Refined analysis of the Swift-BAT burst
  97. GRB 060424: Swift detection of a burst
  98. Swift-BAT detection of Mrk 421
  99. GRB060421: Swift/UVOT observations
  100. GRB 060421: Swift-BAT Refined Analysis

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