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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"

37579 results found.

  1. GRB 060602: Swift detection of a burst
  2. GRB 060502A: Optical afterglow observations
  3. GRB 060526: Break in X-ray light curve
  4. GRB 060526: RTT150 optical observations
  5. GRB060526, optical observations
  6. GRB 051227 : WIDGET simultaneous optical observations
  7. GRB 051028 : WIDGET pre-trigger limit
  8. GRB 060526: RTT150 optical observations
  9. GRB 060526: Multiple Optical Flares
  10. GRB060526: afterglow fitting and probable jet break
  11. GRB 060526: RTT150 optical observations
  12. GRB060502b: optical observations
  13. GRB 060526: RTT150 optical observations
  14. GRB 060526: Tautenburg OT observation and light curve fitting
  15. GRB060526: optical observations
  16. GRB 060526: SMARTS optical/IR afterglow observations
  17. GRB 060526: REM observations
  18. GRB 060526: RTT150 optical observations, afterglow flattening
  19. GRB 060526: Optical Flare
  20. GRB 060526: MDM-2.4m Observations
  21. GRB 060526: Refined analysis of the Swift-BAT burst
  22. GRB 060526: RTT150 optical observations
  23. GRB060526, optical observations
  24. GRB 060526: Magellan Redshift
  25. GRB 060526 Lulin optical observation
  26. GRB 060526: Swift/XRT Team refined analysis
  27. GRB 060526: TNG optical observations
  28. GRB 060526: ROTSE-III Observations of Optical Counterpart
  29. GRB 060526: Watcher Observations
  30. GRB060526 - SDSS Pre-burst Observations
  31. GRB 060526: Continued emission for the Swift burst
  32. GRB 060526: Swift detection of a burst with x-ray and optical afterglow
  33. GRB 060413 : WIDGET simultaneous optical observations
  34. GRB 060522: Swift/UVOT Observations: Correction
  35. GRB 060522: Swift/UVOT Observations of the Optical Afterglow
  36. XMM-Newton observation of GRB060510b
  37. GRB 060522: Swift/XRT Team refined analysis
  38. GRB 060522: Swift-BAT Refined Analysis
  39. GRB 060522: REM NIR observations
  40. GRB 060522: TNG optical observations
  41. GRB 060522: Swift detection of a burst with possible optical afterglow
  42. GRB 060512: reanalysis of optical spectra
  43. GRB 060515: NIR observation
  44. GRB 060210: Jet Break in the XRT light curve
  45. GRB 060516: Refined analysis of the Swift-BAT burst
  46. GRB 060512: TNG optical spectroscopy
  47. GRB 060516: Swift detection of a burst
  48. GRB 060505 BAT refined analysis
  49. GRB 060515 BAT refined analysis
  50. GRB 060512: TAROT optical observation
  51. GRB 060515: Swift/XRT Team refined analysis
  52. GRB 060515: Swift/UVOT Upper Limits
  53. GRB 060515: Swift/XRT position
  54. GRB 060515: Super-LOTIS Observations
  55. GRB060515: Swift/UVOT initial observation
  56. GRB 060515: TAROT optical observation
  57. GRB 060515: ROTSE-III Optical Limits
  58. GRB 060515: Swift detection of a burst
  59. VLT optical spectroscopy of GRB 060512
  60. Swift/UVOT observations of GRB060512.
  61. GRB 060512: Subaru NIR observation
  62. GRB060512: Swift XRT Team refined analysis
  63. GRB 060512: 1.54m Kuiper Observations
  64. GRB 060512: Detection of NIR afterglow
  65. GRB 060512: P60 Observations
  66. GRB 060512: Swift-BAT Refined Analysis
  67. GRB 060505 - OT candidate + galaxy spectrum
  68. GRB 060512: optical decay
  69. GRB 060512: REM NIR observations
  70. GRB060512 - SDSS Pre-Burst Observations
  71. GRB060512 Name Correction: LT Afterglow detection
  72. GRB060512: Liverpool Telescope Afterglow detection
  73. GRB 060512: Swift detection of a burst with an optical afterglow
  74. GRB 060510A: Swift/UVOT Detection of an Optical Afterglow
  75. GRB 060505: X-ray afterglow - Correction -
  76. GRB 060505: X-ray afterglow
  77. Konus-Wind observation of GRB 060510A
  78. GRB060418: optical observations
  79. GRB 060428a, SMARTS optical/IR afterglow detection
  80. GRB060510B: Swift XRT refined analysis
  81. GRB 060510B: Swift/UVOT Upper Limits
  82. GRB 060510A: Refined analysis of the Swift-BAT burst
  83. GRB 060510B: Swift-BAT Refined Analysis
  84. GRB060510A: XRT refined analysis
  85. GRB060510 - SDSS Pre-Burst Observations
  86. GRB 060510b: Redshift
  87. GRB060510B : Faulkes North Telescope detection
  88. GRB 060510B : Planned XMM-Newton observation
  89. GRB 060510b: Gemini NIR observations
  90. GRB 060510B: Super-LOTIS Observations
  91. GRB 060510b: NIR observations
  92. GRB 060510B: Coordinate correction
  93. GRB 060510B: MDM Observations and candidate OT
  94. GRB 060510B: Swift detection of a burst
  95. GRB 060510: Swift detection of a burst with optical transient
  96. GRB060507: optical afterglow detection
  97. GRB060502B: improvement in the XRT afterglow position
  98. GRB 060507: BART limit
  99. GRB 060507: Final Refined analysis of the Swift-BAT burst
  100. GRB 060507: Swift-BAT Refined Analysis

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