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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"

28258 results found.

  1. GRB 060428: Swift detection of a burst
  2. GRB 060427: Swift/UVOT upper limits.
  3. GRB 060427: Refined analysis of the Swift-BAT burst
  4. GRB060427: Swift XRT Team refined analysis
  5. GRB060418: Swift XRT Team Further Refined Analysis
  6. GRB060425:MASTER survey observations
  7. GRB 060427, optical observation
  8. GRB 060427: Swift detection of a burst
  9. GRB060418: Further Analysis of MIKE Spectroscopy
  10. GRB 060424: Refined analysis of the Swift-BAT burst
  11. GRB 060421: TTT Observations
  12. GRB060421: Swift/UVOT observations
  13. GRB 060421: Swift-BAT Refined Analysis
  14. GRB 060421: Swift-XRT refined analysis
  15. GRB 060418: prediction of t_break
  16. GRB(?) 060421: Swift detection of a burst
  17. Erratum of GCN 4983 for GRB 060418 IR follow-up
  18. GRB 060418 : IR afterglow observations
  19. GRB 060418: Radio Observations
  20. GRB060418, BVRcIc field calibration
  21. GRB060418: Swift/UVOT Observations
  22. GRB060418: Optical Observations
  23. GRB 060418: Refined Analysis of the Swift-BAT burst
  24. GRB 060418, SMARTS continuing afterglow observations
  25. GRB 060418, SMARTS optical/IR afterglow observations
  26. GRB060418 : LT optical afterglow observation
  27. GRB 060418: REM candidate afterglow
  28. GRB 060418: Swift detection of a burst with bright x-ray and optical afterglow
  29. GRB060413: Swift/UVOT upper limits
  30. GRB 060413: REM NIR Observations
  31. GRB 060413: Refined analysis of the Swift-BAT burst
  32. GRB 060403: MITSuME optical observation
  33. GRB060403: Optical Limit
  34. GRB060403: XRT refined analysis
  35. GRB 060403: Swift/UVOT upper limits
  36. SGR 1900+14: BAT observations
  37. GRB 060403: Refined analysis of the Swift-BAT burst
  38. Konus-Wind observation of the recent SGR 1900+14 activity. Will
  39. GRB 060403: Swift detection of a burst
  40. HETE trigger H4044: RTT150 optical observations
  41. GRB060331: Swift/UVOT upper limits
  42. Swift XRT observations of the HETE transient H4043
  43. H4043, an unusual high-energy transient observed by HETE
  44. GRB 060322: LNA optical limit
  45. SGR 1900+14: bright burst detected by Konus-Wind on March 28
  46. INTEGRAL and XMM ToO observations of SGR1900+14
  47. SGR 1900+14: Swift-BAT detection of a bright outburst
  48. GRB 060323 : WIDGET simultaneous optical observations
  49. GRB 060323: Early optical observation at Xinglong
  50. GRB 060322: Confirmation of Swift XRT afterglow
  51. GRB060323: NOT optical observations
  52. GRB 060322: IAC80 optical observations
  53. GRB 060322: Swift XRT afterglow candidate
  54. GRB060323: P60 Observations
  55. GRB 060323: Swift/UVOT Observations
  56. GRB 060323: optical afterglow confirmed
  57. GRB060323: NOT observations
  58. GRB 060323: Optical Observations
  59. GRB 060323: Refined analysis of the Swift-BAT burst
  60. GRB 060323: optical observations at TNG
  61. GRB 060323: BVRI observations at Tautenburg, aftreglow candidate
  62. GRB 060322: Refined analysis of the Swift-BAT burst
  63. GRB060323, optical observation
  64. GRB060323 - SDSS Pre-Burst Observations
  65. GRB 060323: Swift detection of a burst with a possible optical afterglow
  66. GRB 060322: Swift-BAT detection of a 200-sec burst
  67. GRB 060218/SN 2006aj, LNA optical observation
  68. GRB060218: Refined photometric calibration of comparison stars
  69. GRB 060319: WHT K-band candidate afterglow
  70. GRB060319: Swift/UVOT upper limits
  71. GRB 060319: Swift-BAT refined analysis
  72. GRB 060319 optical observations at TNG
  73. GRB060319 : Liverpool Telescope optical limit
  74. GRB060319 - SDSS Pre-burst Observations
  75. GRB060313: Radio Observations
  76. GRB 060313: early afterglow NIR upper limits with REM
  77. GRB 060313: Further analysis of the Swift-BAT bright short hard burst
  78. GRB 060313: Swift/UVOT Observations
  79. GRB 060313: Refined analysis of the Swift-BAT bright short hard burst
  80. GRB 060313, SMARTS optical counterpart?
  81. GRB 060313, SMARTS optical/IR observations
  82. GRB060313: optical and near infrared observations with REM
  83. GRB060218: SARA Observations of SN2006aj
  84. GRB 060312: Refined analysis of the Swift-BAT burst
  85. GRB 060218/SN 2006aj, high resolution spectra
  86. GRB 060312: Swift XRT team refined analysis
  87. GRB060306: APO Ks-band Imaging Observations
  88. GRB 060312: ROTSE-III Optical Limits
  89. Bright short hard GRB 060303: IPN localization and Konus spectrum
  90. GRB060219: Liverpool Telescope observations
  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: Swift detection of a bright burst
  97. GRB060218: Ep,i - Eiso correlation
  98. GRB060223b: optical limit
  99. GRB 060223b: Swift/UVOT Upper Limits
  100. GRB 060218/SN 2006aj: K-380 optical observations

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