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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"

42286 results found.

  1. GRB 060522: Swift/XRT Team refined analysis
  2. GRB 060522: Swift-BAT Refined Analysis
  3. GRB 060522: REM NIR observations
  4. GRB 060522: TNG optical observations
  5. GRB 060522: Swift detection of a burst with possible optical afterglow
  6. GRB 060512: reanalysis of optical spectra
  7. GRB 060515: NIR observation
  8. GRB 060210: Jet Break in the XRT light curve
  9. GRB 060516: Refined analysis of the Swift-BAT burst
  10. GRB 060512: TNG optical spectroscopy
  11. GRB 060516: Swift detection of a burst
  12. GRB060515: P200 NIR Observations
  13. GRB 060505 BAT refined analysis
  14. GRB 060515 BAT refined analysis
  15. GRB 060512: TAROT optical observation
  16. GRB 060515: Swift/XRT Team refined analysis
  17. GRB 060515: Swift/UVOT Upper Limits
  18. GRB 060515: Swift/XRT position
  19. GRB 060515: Super-LOTIS Observations
  20. GRB060515: Swift/UVOT initial observation
  21. GRB 060515: TAROT optical observation
  22. GRB 060515: ROTSE-III Optical Limits
  23. GRB 060515: Swift detection of a burst
  24. VLT optical spectroscopy of GRB 060512
  25. Swift/UVOT observations of GRB060512.
  26. GRB 060512: Subaru NIR observation
  27. GRB060512: Swift XRT Team refined analysis
  28. GRB 060512: 1.54m Kuiper Observations
  29. GRB 060512: P60 Observations
  30. GRB 060512: Swift-BAT Refined Analysis
  31. GRB 060505 - OT candidate + galaxy spectrum
  32. GRB 060512: optical decay
  33. GRB 060512: REM NIR observations
  34. GRB060512 - SDSS Pre-Burst Observations
  35. GRB060512 Name Correction: LT Afterglow detection
  36. GRB060512: Liverpool Telescope Afterglow detection
  37. GRB 060512: Swift detection of a burst with an optical afterglow
  38. GRB 060510A: Swift/UVOT Detection of an Optical Afterglow
  39. GRB 060505: X-ray afterglow - Correction -
  40. GRB 060505: X-ray afterglow
  41. Konus-Wind observation of GRB 060510A
  42. GRB060418: optical observations
  43. GRB 060428a, SMARTS optical/IR afterglow detection
  44. GRB060510B: Swift XRT refined analysis
  45. GRB 060510B: Swift/UVOT Upper Limits
  46. GRB 060510A: Refined analysis of the Swift-BAT burst
  47. GRB 060510B: Swift-BAT Refined Analysis
  48. GRB060510A: XRT refined analysis
  49. GRB060510 - SDSS Pre-Burst Observations
  50. GRB 060510b: Redshift
  51. GRB060510B : Faulkes North Telescope detection
  52. GRB 060510B : Planned XMM-Newton observation
  53. GRB 060510b: Gemini NIR observations
  54. GRB 060510b: NIR observations
  55. GRB 060510B: MDM Observations and candidate OT
  56. GRB 060510B: Swift detection of a burst
  57. GRB 060510: Swift detection of a burst with optical transient
  58. GRB060507: optical afterglow detection
  59. GRB060502B: improvement in the XRT afterglow position
  60. GRB 060507: Swift-BAT Refined Analysis
  61. GRB 060505: PROMPT Observations
  62. GRB 060507: Swift/UVOT Upper Limits
  63. GRB 060507: Swift XRT Team Refined Analysis
  64. GRB 060507: MDM Optical Upper Limit
  65. GRB060507: Swift XRT position
  66. GRB 060507: Swift detection of a burst
  67. GRB 060429: Suzaku WAM observation
  68. GRB060505: Swift/UVOT Observations
  69. GRB 060505: Swift XRT Team Refined Analysis
  70. GRB060425: new MASTER survey method
  71. GRB 060306: Further Analysis of SOAR and APO NIR Observations
  72. GRB 060505: Swift XRT afterglow canditate position
  73. GRB 060502b: Second epoch Gemini observations
  74. GRB 060428B: spectroscopy
  75. GRB 060502B: optical observations
  76. GRB 060502B: AROMA refined photometric calibration
  77. GRB 060502b: Gemini imaging and spectroscopy
  78. GRB060502A, optical observation
  79. GRB 060502B: Swift/UVOT upper limits
  80. GRB 060502A: Swift/UVOT source detection
  81. GRB 060429: Refined IPN error box and Konus-Wind spectrum
  82. GRB 060502B: MDM Optical Observation
  83. GRB 060502B: AROMA optical observations
  84. GRB 060502B: Refined analysis of the Swift-BAT short burst
  85. GRB060502B: Swift XRT Team refined analysis
  86. Short GRB 060502B: Tautenburg Observation
  87. GRB 060427B Milagro GeV/TeV Observations
  88. GRB060502B: correction to XRT position
  89. GRB 060501: P60 Observations and Candidate Retraction
  90. GRB 060502B: Xinglong optical observation
  91. GRB 060502B: MASTER optical observations
  92. GRB 060502B: Swift detection of a short burst
  93. GRB060502: Swift-XRT refined analysis
  94. GRB060502: Gemini spectroscopy
  95. GRB 060502: APO Spectroscopic Observations
  96. GRB060501: Swift UVOT followup observations
  97. GRB 060502: P60 Afterglow Confirmation
  98. GRB 060502: Swift detection of a burst with an optical counterpart
  99. GRB060501: Super-LOTIS observations
  100. GRB060501: P60 imaging and afterglow candidate

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