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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"

19665 results found.

  1. GRB 060522: Swift-BAT Refined Analysis
  2. GRB 060522: Swift detection of a burst with possible optical afterglow
  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: Detection of NIR afterglow
  20. GRB 060512: Swift-BAT Refined Analysis
  21. GRB060512 Name Correction: LT Afterglow detection
  22. GRB060512: Liverpool Telescope Afterglow detection
  23. GRB 060512: Swift detection of a burst with an optical afterglow
  24. GRB 060510A: Swift/UVOT Detection of an Optical Afterglow
  25. GRB 060505: X-ray afterglow - Correction -
  26. GRB 060505: X-ray afterglow
  27. Konus-Wind observation of GRB 060510A
  28. GRB 060428a, SMARTS optical/IR afterglow detection
  29. GRB060510B: Swift XRT refined analysis
  30. GRB 060510B: Swift/UVOT Upper Limits
  31. GRB 060510A: Refined analysis of the Swift-BAT burst
  32. GRB 060510B: Swift-BAT Refined Analysis
  33. GRB060510A: XRT refined analysis
  34. GRB 060510B: Super-LOTIS Observations
  35. GRB 060510B: MDM Observations and candidate OT
  36. GRB 060510B: Swift detection of a burst
  37. GRB 060510: Swift detection of a burst with optical transient
  38. GRB060502B: improvement in the XRT afterglow position
  39. GRB 060507: BART limit
  40. GRB 060507: Final Refined analysis of the Swift-BAT burst
  41. GRB 060507: Swift-BAT Refined Analysis
  42. GRB 060507: Swift/UVOT Upper Limits
  43. GRB 060507: Swift XRT Team Refined Analysis
  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 Team Refined Analysis
  49. GRB 060505: Swift XRT afterglow canditate position
  50. GRB 060505: Swift-BAT detection of a weak burst
  51. GRB 060502B MDM Follow-up Observation
  52. GRB060502A, optical observation
  53. GRB 060502B: Swift/UVOT upper limits
  54. GRB 060502A: Swift/UVOT source detection
  55. GRB 060502B: MDM Optical Observation
  56. GRB 060502B: Refined analysis of the Swift-BAT short burst
  57. GRB060502B: Swift XRT Team refined analysis
  58. GRB060502B: correction to XRT position
  59. GRB 060502B: MASTER optical observations
  60. GRB 060502B: Swift detection of a short burst
  61. GRB060502: Swift-XRT refined analysis
  62. GRB 060502: Swift-BAT refined analysis
  63. GRB 060502: APO Spectroscopic Observations
  64. GRB060501: Swift UVOT followup observations
  65. GRB060502: Super-LOTIS Observations
  66. GRB 060502: Swift detection of a burst with an optical counterpart
  67. GRB 060501: MDM Observations
  68. GRB060501: Super-LOTIS observations
  69. GRB060501: P60 imaging and afterglow candidate
  70. GRB 060501: Refined analysis of the Swift-BAT burst
  71. GRB060501: Swift XRT position
  72. GRB 060501: ROTSE-III Optical Limits
  73. GRB 060501: Swift detection of a burst
  74. GRB060428B: optical observation
  75. GRB060428B: possible detection of an optical counterpart by Swift/UVOT.
  76. GRB 060428B: MDM Observations
  77. GRB060428B: Swift XRT Team refined analysis
  78. GRB 060427B: IPN localization of a short hard burst
  79. GRB 060428B: Refined analysis of the Swift-BAT burst
  80. GRB 060428B: KAIT observations
  81. GRB060428A: Swift/UVOT observations.
  82. GRB060428B, optical observation
  83. GRB 060428A: Refined analysis of the Swift-BAT burst
  84. GRB060428A: Swift XRT Team refined analysis
  85. GRB 060428B: Swift detection of a burst
  86. GRB 060428: Swift detection of a burst
  87. GRB 060427: NOT observations
  88. GRB 060427: Swift/UVOT upper limits.
  89. GRB 060427: Refined analysis of the Swift-BAT burst
  90. GRB060427: Swift XRT Team refined analysis
  91. GRB060418: Swift XRT Team Further Refined Analysis
  92. GRB 060427, optical observation
  93. GRB 060427: Swift detection of a burst
  94. GRB 060425: IPN localization and KW spectrum of a short, hard burst
  95. GRB 060424: Refined analysis of the Swift-BAT burst
  96. GRB 060424: Swift detection of a burst
  97. Swift-BAT detection of Mrk 421
  98. GRB060421: Swift/UVOT observations
  99. GRB 060421: Swift-BAT Refined Analysis
  100. GRB 060421: Swift-XRT refined analysis

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