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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"

19662 results found.

  1. GRB 060418: prediction of t_break
  2. Konus-Wind observation of GRB 060418
  3. GRB(?)060421:MASTER optical limit
  4. GRB(?)060421 : XRT position
  5. Possible GRB060421: BART limits
  6. GRB(?) 060421: Swift detection of a burst
  7. GRB060418: Swift/UVOT Observations
  8. GRB 060418: FRAM early afterglow observation
  9. GRB 060418: Refined Analysis of the Swift-BAT burst
  10. VLT/UVES observations of GRB060418
  11. GRB060418: Swift XRT Team Refined Analysis
  12. GRB060418: Magellan/MIKE Spectroscopic Redshift
  13. GRB 060418: Swift detection of a burst with bright x-ray and optical afterglow
  14. SGR 1900+14: Refined analysis of the Swift-BAT outburst
  15. GRB060413: Swift/UVOT upper limits
  16. SGR 1900+14: Swift detection of an outburst
  17. GRB 060413: Refined analysis of the Swift-BAT burst
  18. GRB 060413: XRT refined analysis
  19. GRB 060413: No Optical Afterglow in Swift/UVOT TDRSS Data
  20. GRB 060413: Swift detection of a burst
  21. GRB060403: XRT refined analysis
  22. GRB 060403: Swift/UVOT upper limits
  23. SGR 1900+14: BAT observations
  24. GRB 060403: Refined analysis of the Swift-BAT burst
  25. GRB060403: Swift XRT refined position
  26. Konus-Wind observation of the recent SGR 1900+14 activity. Will
  27. GRB 060403: Swift detection of a burst
  28. GRB060331: Swift/UVOT upper limits
  29. Swift XRT observations of the HETE transient H4043
  30. SGR 1900+14: bright burst detected by Konus-Wind on March 28
  31. SGR 1900+14: Swift-BAT detection of a cluster of outbursts
  32. SGR 1900+14: Swift-BAT detection of a bright outburst
  33. GRB 060323 : WIDGET simultaneous optical observations
  34. GRB 060322: Confirmation of Swift XRT afterglow
  35. GRB060323: optical limit
  36. SGR 1900+14: CORRECTION to GCN 4923
  37. SGR 1900+14: Refined Swift-BAT analysis of the renewed activity
  38. SGR 1900+14: Swift detection of renewed activity
  39. GRB060323: NOT optical observations
  40. GRB 060322: IAC80 optical observations
  41. GRB 060322: Swift XRT afterglow candidate
  42. GRB 060323: Swift/UVOT Observations
  43. GRB060323: NOT observations
  44. GRB 060323: Refined analysis of the Swift-BAT burst
  45. GRB 060323: Swift XRT refined analysis
  46. GRB 060323: Swift/XRT position
  47. GRB 060322: Refined analysis of the Swift-BAT burst
  48. GRB060323 - SDSS Pre-Burst Observations
  49. GRB 060323: Swift detection of a burst with a possible optical afterglow
  50. GRB 060322: Swift-BAT detection of a 200-sec burst
  51. GRB 060319: IAC-80 optical observations
  52. GRB060319: Swift XRT refined analysis
  53. GRB060319: Swift/UVOT upper limits
  54. GRB 060319: Swift-BAT refined analysis
  55. GRB060319: Swift/XRT position
  56. GRB 060319: Swift detection of a burst
  57. Konus-Wind observation of GRB 060313
  58. GRB 060313: Further analysis of the Swift-BAT bright short hard burst
  59. GRB 060313: Swift/UVOT Observations
  60. GRB 060313: Swift-XRT team refined analysis
  61. GRB 060313: Refined analysis of the Swift-BAT bright short hard burst
  62. GRB 060313: Swift XRT position
  63. GRB060313: optical and near infrared observations with REM
  64. GRB 060313: Swift-BAT detection of a bright short hard burst
  65. GRB060312: Swift UVOT observation
  66. GRB 060312: Refined analysis of the Swift-BAT burst
  67. GRB 060312: Swift XRT team refined analysis
  68. GRB060306: APO Ks-band Imaging Observations
  69. GRB 060312: ROTSE-III Optical Limits
  70. GRB 060312: Swift detection of a burst
  71. Bright short hard GRB 060303: IPN localization and Konus spectrum
  72. GRB060218: analysis of the XMM-Newton observation
  73. Swift/UVOT observations of GRB060306
  74. GRB 060306: Swift-BAT refined analysis
  75. GRB 060306: Swift-XRT team refined analysis
  76. GRB 060306: Swift detection of a bright burst
  77. GRB060218: Ep,i - Eiso correlation
  78. GRB 060223b: Swift/UVOT Upper Limits
  79. GRB 060223B: Swift XRT possible afterglow
  80. GRB 060223B: Swift-BAT refined analysis
  81. GRB 060223a: Swift/UVOT refined analysis
  82. GRB 060223: Swift XRT Team preliminary analysis
  83. GRB 060218/SN 2006aj: Swift-BAT fluence and peak flux
  84. GRB 060223B: Swift detection of a bright burst
  85. GRB 060223: Swift-BAT refined analysis
  86. GRB 060223: Swift/UVOT Confirmation of Optical Afterglow
  87. GRB 060223: Swift detection of a burst
  88. GRB 060219: Swift-BAT refined analysis
  89. GRB 060218: Further refined analysis of the Swift-BAT burst
  90. GRB 060218: Likely an underluminous GRB
  91. GRB 060219: SDSS galaxy inside XRT error circle
  92. GRB060218: UV Detection and Light Curves
  93. GRB 060219: Swift/UVOT Upper Limits
  94. GRB 060219: Swift-XRT Team refined analysis
  95. GRB 051221B: Swift-XRT Team Refined Analysis
  96. GRB 060219: Partial refined analysis of the Swift-BAT burst
  97. GRB 060219: Swift-XRT position typo correction
  98. GRB 060219: Swift-XRT position
  99. GRB 060218: optical/nIR observations at La Palma
  100. GRB 060219: Swift-BAT detection of a weak burst

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