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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"

37214 results found.

  1. GRB 060526: TNG optical observations
  2. GRB 060526: ROTSE-III Observations of Optical Counterpart
  3. GRB 060526: Watcher Observations
  4. GRB060526 - SDSS Pre-burst Observations
  5. GRB 060526: Continued emission for the Swift burst
  6. GRB 060526: Swift detection of a burst with x-ray and optical afterglow
  7. GRB 060413 : WIDGET simultaneous optical observations
  8. GRB 060522: Swift/UVOT Observations: Correction
  9. GRB 060522: Swift/UVOT Observations of the Optical Afterglow
  10. XMM-Newton observation of GRB060510b
  11. GRB 060522: Swift/XRT Team refined analysis
  12. GRB 060522: Swift-BAT Refined Analysis
  13. GRB 060522: REM NIR observations
  14. GRB 060522: TNG optical observations
  15. GRB 060522: Swift detection of a burst with possible optical afterglow
  16. GRB 060512: reanalysis of optical spectra
  17. GRB 060515: NIR observation
  18. GRB 060210: Jet Break in the XRT light curve
  19. GRB 060516: Refined analysis of the Swift-BAT burst
  20. GRB 060512: TNG optical spectroscopy
  21. GRB 060516: Swift detection of a burst
  22. GRB 060505 BAT refined analysis
  23. GRB 060515 BAT refined analysis
  24. GRB 060512: TAROT optical observation
  25. GRB 060515: Swift/XRT Team refined analysis
  26. GRB 060515: Swift/UVOT Upper Limits
  27. GRB 060515: Swift/XRT position
  28. GRB 060515: Super-LOTIS Observations
  29. GRB060515: Swift/UVOT initial observation
  30. GRB 060515: TAROT optical observation
  31. GRB 060515: ROTSE-III Optical Limits
  32. GRB 060515: Swift detection of a burst
  33. VLT optical spectroscopy of GRB 060512
  34. Swift/UVOT observations of GRB060512.
  35. GRB 060512: Subaru NIR observation
  36. GRB060512: Swift XRT Team refined analysis
  37. GRB 060512: 1.54m Kuiper Observations
  38. GRB 060512: Detection of NIR afterglow
  39. GRB 060512: P60 Observations
  40. GRB 060512: Swift-BAT Refined Analysis
  41. GRB 060505 - OT candidate + galaxy spectrum
  42. GRB 060512: optical decay
  43. GRB 060512: REM NIR observations
  44. GRB060512 - SDSS Pre-Burst Observations
  45. GRB060512 Name Correction: LT Afterglow detection
  46. GRB060512: Liverpool Telescope Afterglow detection
  47. GRB 060512: Swift detection of a burst with an optical afterglow
  48. GRB 060510A: Swift/UVOT Detection of an Optical Afterglow
  49. GRB 060505: X-ray afterglow - Correction -
  50. GRB 060505: X-ray afterglow
  51. Konus-Wind observation of GRB 060510A
  52. GRB060418: optical observations
  53. GRB 060428a, SMARTS optical/IR afterglow detection
  54. GRB060510B: Swift XRT refined analysis
  55. GRB 060510B: Swift/UVOT Upper Limits
  56. GRB 060510A: Refined analysis of the Swift-BAT burst
  57. GRB 060510B: Swift-BAT Refined Analysis
  58. GRB060510A: XRT refined analysis
  59. GRB060510 - SDSS Pre-Burst Observations
  60. GRB 060510b: Redshift
  61. GRB060510B : Faulkes North Telescope detection
  62. GRB 060510B : Planned XMM-Newton observation
  63. GRB 060510b: Gemini NIR observations
  64. GRB 060510B: Super-LOTIS Observations
  65. GRB 060510b: NIR observations
  66. GRB 060510B: Coordinate correction
  67. GRB 060510B: MDM Observations and candidate OT
  68. GRB 060510B: Swift detection of a burst
  69. GRB 060510: Swift detection of a burst with optical transient
  70. GRB060507: optical afterglow detection
  71. GRB060502B: improvement in the XRT afterglow position
  72. GRB 060507: BART limit
  73. GRB 060507: Final Refined analysis of the Swift-BAT burst
  74. GRB 060507: Swift-BAT Refined Analysis
  75. GRB 060505: PROMPT Observations
  76. GRB 060507: Swift/UVOT Upper Limits
  77. GRB 060507: Swift XRT Team Refined Analysis
  78. GRB 060507: MDM Optical Upper Limit
  79. GRB060507: Swift XRT position
  80. GRB 060507: Swift detection of a burst
  81. GRB 060429: Suzaku WAM observation
  82. GRB060505: Swift/UVOT Observations
  83. GRB 060505: Swift XRT Team Refined Analysis
  84. GRB060425: new MASTER survey method
  85. GRB 060306: Further Analysis of SOAR and APO NIR Observations
  86. GRB 060505: Swift XRT afterglow canditate position
  87. GRB 060502b: Second epoch Gemini observations
  88. GRB 060505: Swift-BAT detection of a weak burst
  89. GRB 060428B: spectroscopy
  90. GRB 060502B: optical observations
  91. GRB 060502B: AROMA refined photometric calibration
  92. GRB 060502B MDM Follow-up Observation
  93. GRB 060502b: Gemini imaging and spectroscopy
  94. GRB060502A, optical observation
  95. GRB 060502B: Swift/UVOT upper limits
  96. GRB 060502A: Swift/UVOT source detection
  97. GRB 060429: Refined IPN error box and Konus-Wind spectrum
  98. GRB 060502B: MDM Optical Observation
  99. GRB 060502B: AROMA optical observations
  100. GRB 060502B: Refined analysis of the Swift-BAT short burst

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