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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"

45606 results found.

  1. GRB 060526: Tautenburg OT observation and light curve fitting
  2. GRB060526: optical observations
  3. GRB 060526: SMARTS optical/IR afterglow observations
  4. GRB060526: possible break in the optical light curve
  5. GRB 060526: REM observations
  6. GRB 060526: RTT150 optical observations, afterglow flattening
  7. GRB 060526: Optical Flare
  8. GRB 060526: Refined analysis of the Swift-BAT burst
  9. GRB 060526: RTT150 optical observations
  10. GRB060526: Further Swift-UVOT Observations
  11. GRB060526, optical observations
  12. GRB 060526: Magellan Redshift
  13. GRB 060526 Lulin optical observation
  14. GRB 060526: Swift/XRT Team refined analysis
  15. GRB 060526: TNG optical observations
  16. GRB 060526: ROTSE-III Observations of Optical Counterpart
  17. GRB 060526: Watcher Observations
  18. GRB060526 - SDSS Pre-burst Observations
  19. GRB 060526: Continued emission for the Swift burst
  20. GRB 060526: Swift detection of a burst with x-ray and optical afterglow
  21. GRB060505: VLT observations of the optical afterglow
  22. GRB 060413 : WIDGET simultaneous optical observations
  23. GRB 060522: Swift/UVOT Observations: Correction
  24. GRB 060522: Swift/UVOT Observations of the Optical Afterglow
  25. XMM-Newton observation of GRB060510b
  26. GRB060512: Late-Time P200 Observations
  27. GRB060522: z = 5.11 Keck-LRIS Redshift
  28. GRB 060522: Swift/XRT Team refined analysis
  29. GRB 060522: Swift-BAT Refined Analysis
  30. GRB 060522: REM NIR observations
  31. GRB 060522: TNG optical observations
  32. GRB 060522: Swift detection of a burst with possible optical afterglow
  33. GRB 060512: reanalysis of optical spectra
  34. GRB 060515: NIR observation
  35. GRB 060210: Jet Break in the XRT light curve
  36. GRB 060516: Refined analysis of the Swift-BAT burst
  37. GRB 060512: TNG optical spectroscopy
  38. GRB 060516: Swift detection of a burst
  39. GRB060515: P200 NIR Observations
  40. GRB 060505 BAT refined analysis
  41. GRB 060515 BAT refined analysis
  42. GRB 060512: TAROT optical observation
  43. GRB 060515: Swift/XRT Team refined analysis
  44. GRB 060515: Swift/UVOT Upper Limits
  45. GRB 060515: Swift/XRT position
  46. GRB 060515: Super-LOTIS Observations
  47. GRB060515: Swift/UVOT initial observation
  48. GRB 060515: TAROT optical observation
  49. GRB 060515: ROTSE-III Optical Limits
  50. GRB 060515: Swift detection of a burst
  51. VLT optical spectroscopy of GRB 060512
  52. Swift/UVOT observations of GRB060512.
  53. GRB 060512: Subaru NIR observation
  54. GRB060512: Swift XRT Team refined analysis
  55. GRB 060512: 1.54m Kuiper Observations
  56. GRB 060512: Detection of NIR afterglow
  57. GRB 060512: P60 Observations
  58. GRB 060512: Swift-BAT Refined Analysis
  59. GRB 060505 - OT candidate + galaxy spectrum
  60. GRB 060512: optical decay
  61. GRB 060512: REM NIR observations
  62. GRB060512 - SDSS Pre-Burst Observations
  63. GRB060512 Name Correction: LT Afterglow detection
  64. GRB060512: Liverpool Telescope Afterglow detection
  65. GRB 060512: Swift detection of a burst with an optical afterglow
  66. GRB 060510A: Swift/UVOT Detection of an Optical Afterglow
  67. GRB 060505: X-ray afterglow - Correction -
  68. GRB 060505: X-ray afterglow
  69. Konus-Wind observation of GRB 060510A
  70. GRB060418: optical observations
  71. GRB 060428a, SMARTS optical/IR afterglow detection
  72. GRB060510B: Swift XRT refined analysis
  73. GRB 060510B: Swift/UVOT Upper Limits
  74. GRB 060510A: Refined analysis of the Swift-BAT burst
  75. GRB 060510B: Swift-BAT Refined Analysis
  76. GRB060510A: XRT refined analysis
  77. GRB060510 - SDSS Pre-Burst Observations
  78. GRB 060510b: Redshift
  79. GRB060510B : Faulkes North Telescope detection
  80. GRB 060510B : Planned XMM-Newton observation
  81. GRB 060510b: Gemini NIR observations
  82. GRB 060510B: Super-LOTIS Observations
  83. GRB 060510b: NIR observations
  84. GRB 060510B: Coordinate correction
  85. GRB 060510B: MDM Observations and candidate OT
  86. GRB 060510B: Swift detection of a burst
  87. GRB 060510: Swift detection of a burst with optical transient
  88. GRB060507: optical afterglow detection
  89. GRB060502B: improvement in the XRT afterglow position
  90. GRB 060507: Final Refined analysis of the Swift-BAT burst
  91. GRB 060507: Swift-BAT Refined Analysis
  92. GRB 060505: PROMPT Observations
  93. GRB 060507: Swift/UVOT Upper Limits
  94. GRB 060507: Swift XRT Team Refined Analysis
  95. GRB 060507: MDM Optical Upper Limit
  96. GRB060507: Swift XRT position
  97. GRB 060507: Swift detection of a burst
  98. GRB 060429: Suzaku WAM observation
  99. GRB060505: Swift/UVOT Observations
  100. GRB 060505: Swift XRT Team Refined Analysis

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