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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.

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subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

36183 results found.

  1. GRB 060418, SMARTS continuing afterglow observations
  2. GRB 060418: PROMPT Detections
  3. GRB 060418, SMARTS optical/IR afterglow observations
  4. GRB060418: Magellan/MIKE Spectroscopic Redshift
  5. GRB060418 : LT optical afterglow observation
  6. GRB 060418: REM candidate afterglow
  7. GRB 060418: Swift detection of a burst with bright x-ray and optical afterglow
  8. GRB 060413: REM NIR Observations
  9. GRB 060413: Refined analysis of the Swift-BAT burst
  10. GRB 060413: Watcher UBVR observations
  11. GRB 060413: XRT refined analysis
  12. GRB 060413: No Optical Afterglow in Swift/UVOT TDRSS Data
  13. GRB 060413: Swift detection of a burst
  14. GRB060403: optical observations
  15. GRB 060403 Optical observations
  16. GRB 060403: MITSuME optical observation
  17. GRB060403: XRT refined analysis
  18. GRB 060403: Swift/UVOT upper limits
  19. GRB 060403: Refined analysis of the Swift-BAT burst
  20. GRB 060403: Swift detection of a burst
  21. GRB 060322: LNA optical limit
  22. GRB 060218SN 2006aj: optical observations at Rozhen Observatory
  23. GRB 060323 : WIDGET simultaneous optical observations
  24. GRB 060323: Early optical observation at Xinglong
  25. GRB060218, optical observations
  26. GRB 060322: Confirmation of Swift XRT afterglow
  27. GRB 060211A: optical observation
  28. GRB060323: optical limit
  29. GRB060211B: optical observation
  30. GRB060323: NOT optical observations
  31. GRB 060322: IAC80 optical observations
  32. GRB 060322: Swift XRT afterglow candidate
  33. GRB 060323: Swift/UVOT Observations
  34. GRB 060323: optical afterglow confirmed
  35. GRB060323: NOT observations
  36. GRB 060323: Optical Observations
  37. GRB 060323: Tautenburg OT candidate retraction
  38. GRB 060323: Refined analysis of the Swift-BAT burst
  39. GRB 060323: optical observations at TNG
  40. GRB 060323: Swift XRT refined analysis
  41. GRB 060323: BVRI observations at Tautenburg, aftreglow candidate
  42. GRB 060323: Swift/XRT position
  43. GRB 060322: Refined analysis of the Swift-BAT burst
  44. GRB060323 - SDSS Pre-Burst Observations
  45. GRB 060323: Swift detection of a burst with a possible optical afterglow
  46. GRB 060322: Swift-BAT detection of a 200-sec burst
  47. GRB060219: optical observation
  48. GRB060206: optical observation
  49. GRB060218/SN2006aj: optical observations
  50. GRB 060218/SN 2006aj, LNA optical observation
  51. GRB060218: Refined photometric calibration of comparison stars
  52. GRB 060319: WHT K-band candidate afterglow
  53. GRB 060319: IAC-80 optical observations
  54. GRB060319: Swift XRT refined analysis
  55. GRB 060319: Re-analysis of TNG data
  56. GRB060319: MASTER limit
  57. GRB 060319: Swift-BAT refined analysis
  58. GRB 060319 optical observations at TNG
  59. GRB060319 : Liverpool Telescope optical limit
  60. GRB060319: MASTER optical observation
  61. GRB060319 - SDSS Pre-burst Observations
  62. GRB 060319: Swift detection of a burst
  63. GRB060313: Radio Observations
  64. GRB 060313: early afterglow NIR upper limits with REM
  65. IBAS Alert n. 3221: not a GRB
  66. Konus-Wind observation of GRB 060313
  67. GRB060313: SSO 40inch Observations
  68. GRB 060313: Further analysis of the Swift-BAT bright short hard burst
  69. GRB 060313: PROMPT Observations
  70. GRB 060313: Swift/UVOT Observations
  71. GRB060313:Gemini South Observations
  72. GRB 060313: Swift-XRT team refined analysis
  73. GRB060313: optical observations of the afterglow candidate
  74. GRB 060313: Refined analysis of the Swift-BAT bright short hard burst
  75. GRB 060313, SMARTS optical counterpart?
  76. GRB 060313: Possible optical counterpart
  77. GRB 060313: Swift XRT position
  78. GRB 060313, SMARTS optical/IR observations
  79. GRB060313: optical and near infrared observations with REM
  80. GRB 060313: Swift-BAT detection of a bright short hard burst
  81. GRB060218: SARA Observations of SN2006aj
  82. GRB 060312: Refined analysis of the Swift-BAT burst
  83. GRB 060218/SN 2006aj, high resolution spectra
  84. GRB 060312: Swift XRT team refined analysis
  85. GRB060306: APO Ks-band Imaging Observations
  86. GRB 060312: ROTSE-III Optical Limits
  87. GRB 060312: Swift detection of a burst
  88. IBAS Alert n. 3218 : not a real GRB
  89. GRB 060306: SOAR Ks Observations
  90. Bright short hard GRB 060303: IPN localization and Konus spectrum
  91. GRB 060306: MAGNUM observations
  92. GRB060218: analysis of the XMM-Newton observation
  93. Swift/UVOT observations of GRB060306
  94. GRB 060306: Swift-BAT refined analysis
  95. GRB 060306: Swift-XRT team refined analysis
  96. GRB 060306: PROMPT Observations
  97. GRB 060306: Swift detection of a bright burst
  98. GRB 060218: RTT150 optical observations
  99. GRB060223b: optical limit
  100. GRB060218/SN 2006aj: optical observation in V

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