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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"

19670 results found.

  1. GRB 060526: Swift detection of a burst with x-ray and optical afterglow
  2. GRB 060413 : WIDGET simultaneous optical observations
  3. GRB 060522: Swift/UVOT Observations: Correction
  4. GRB 060522: Swift/UVOT Observations of the Optical Afterglow
  5. XMM-Newton observation of GRB060510b
  6. GRB 060522: Swift/XRT Team refined analysis
  7. GRB 060522: Swift-BAT Refined Analysis
  8. GRB 060522: Swift detection of a burst with possible optical afterglow
  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: Detection of NIR afterglow
  26. GRB 060512: Swift-BAT Refined Analysis
  27. GRB060512 Name Correction: LT Afterglow detection
  28. GRB060512: Liverpool Telescope Afterglow detection
  29. GRB 060512: Swift detection of a burst with an optical afterglow
  30. GRB 060510A: Swift/UVOT Detection of an Optical Afterglow
  31. GRB 060505: X-ray afterglow - Correction -
  32. GRB 060505: X-ray afterglow
  33. Konus-Wind observation of GRB 060510A
  34. GRB 060428a, SMARTS optical/IR afterglow detection
  35. GRB060510B: Swift XRT refined analysis
  36. GRB 060510B: Swift/UVOT Upper Limits
  37. GRB 060510A: Refined analysis of the Swift-BAT burst
  38. GRB 060510B: Swift-BAT Refined Analysis
  39. GRB060510A: XRT refined analysis
  40. GRB 060510B: Super-LOTIS Observations
  41. GRB 060510B: MDM Observations and candidate OT
  42. GRB 060510B: Swift detection of a burst
  43. GRB 060510: Swift detection of a burst with optical transient
  44. GRB060502B: improvement in the XRT afterglow position
  45. GRB 060507: BART limit
  46. GRB 060507: Final Refined analysis of the Swift-BAT burst
  47. GRB 060507: Swift-BAT Refined Analysis
  48. GRB 060507: Swift/UVOT Upper Limits
  49. GRB 060507: Swift XRT Team Refined Analysis
  50. GRB 060507: MDM Optical Upper Limit
  51. GRB060507: Swift XRT position
  52. GRB 060507: Swift detection of a burst
  53. GRB060505: Swift/UVOT Observations
  54. GRB 060505: Swift XRT Team Refined Analysis
  55. GRB 060505: Swift XRT afterglow canditate position
  56. GRB 060505: Swift-BAT detection of a weak burst
  57. GRB 060502B MDM Follow-up Observation
  58. GRB060502A, optical observation
  59. GRB 060502B: Swift/UVOT upper limits
  60. GRB 060502A: Swift/UVOT source detection
  61. GRB 060502B: MDM Optical Observation
  62. GRB 060502B: Refined analysis of the Swift-BAT short burst
  63. GRB060502B: Swift XRT Team refined analysis
  64. GRB060502B: correction to XRT position
  65. GRB 060502B: MASTER optical observations
  66. GRB 060502B: Swift detection of a short burst
  67. GRB060502: Swift-XRT refined analysis
  68. GRB 060502: Swift-BAT refined analysis
  69. GRB 060502: APO Spectroscopic Observations
  70. GRB060501: Swift UVOT followup observations
  71. GRB060502: Super-LOTIS Observations
  72. GRB 060502: Swift detection of a burst with an optical counterpart
  73. GRB 060501: MDM Observations
  74. GRB060501: Super-LOTIS observations
  75. GRB060501: P60 imaging and afterglow candidate
  76. GRB 060501: Refined analysis of the Swift-BAT burst
  77. GRB060501: Swift XRT position
  78. GRB 060501: ROTSE-III Optical Limits
  79. GRB 060501: Swift detection of a burst
  80. GRB060428B: optical observation
  81. GRB060428B: possible detection of an optical counterpart by Swift/UVOT.
  82. GRB 060428B: MDM Observations
  83. GRB060428B: Swift XRT Team refined analysis
  84. GRB 060427B: IPN localization of a short hard burst
  85. GRB 060428B: Refined analysis of the Swift-BAT burst
  86. GRB 060428B: KAIT observations
  87. GRB060428A: Swift/UVOT observations.
  88. GRB060428B, optical observation
  89. GRB 060428A: Refined analysis of the Swift-BAT burst
  90. GRB060428A: Swift XRT Team refined analysis
  91. GRB 060428B: Swift detection of a burst
  92. GRB 060428: Swift detection of a burst
  93. GRB 060427: NOT observations
  94. GRB 060427: Swift/UVOT upper limits.
  95. GRB 060427: Refined analysis of the Swift-BAT burst
  96. GRB060427: Swift XRT Team refined analysis
  97. GRB060418: Swift XRT Team Further Refined Analysis
  98. GRB 060427, optical observation
  99. GRB 060427: Swift detection of a burst
  100. GRB 060425: IPN localization and KW spectrum of a short, hard burst

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