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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"

45545 results found.

  1. GRB060323: NOT observations
  2. GRB 060323: Optical Observations
  3. GRB 060323: Tautenburg OT candidate retraction
  4. GRB 060323: Refined analysis of the Swift-BAT burst
  5. GRB 060323: optical observations at TNG
  6. GRB 060323: Swift XRT refined analysis
  7. GRB 060323: BVRI observations at Tautenburg, aftreglow candidate
  8. GRB 060323: Swift/XRT position
  9. GRB 060322: Refined analysis of the Swift-BAT burst
  10. GRB060323, optical observation
  11. GRB060323 - SDSS Pre-Burst Observations
  12. GRB 060323: Swift detection of a burst with a possible optical afterglow
  13. GRB 060322: Swift-BAT detection of a 200-sec burst
  14. GRB060219: optical observation
  15. GRB060206: optical observation
  16. GRB060218/SN2006aj: optical observations
  17. GRB 060218/SN 2006aj, LNA optical observation
  18. GRB060218: Refined photometric calibration of comparison stars
  19. GRB 060319: WHT K-band candidate afterglow
  20. GRB 060319: IAC-80 optical observations
  21. GRB060319: Swift XRT refined analysis
  22. GRB060319: Swift/UVOT upper limits
  23. GRB 060319: Re-analysis of TNG data
  24. GRB060319: MASTER limit
  25. GRB 060319: Swift-BAT refined analysis
  26. GRB 060319 optical observations at TNG
  27. GRB060319 : Liverpool Telescope optical limit
  28. GRB060319 - SDSS Pre-burst Observations
  29. GRB060319: Swift/XRT position
  30. GRB 060319: Swift detection of a burst
  31. GRB060313: Radio Observations
  32. GRB 060313: early afterglow NIR upper limits with REM
  33. IBAS Alert n. 3221: not a GRB
  34. Konus-Wind observation of GRB 060313
  35. GRB060313: SSO 40inch Observations
  36. GRB 060313: Further analysis of the Swift-BAT bright short hard burst
  37. GRB 060313: PROMPT Observations
  38. GRB 060313: Swift/UVOT Observations
  39. GRB060313:Gemini South Observations
  40. GRB 060313: Swift-XRT team refined analysis
  41. GRB060313: optical observations of the afterglow candidate
  42. GRB 060313: Refined analysis of the Swift-BAT bright short hard burst
  43. GRB 060313, SMARTS optical counterpart?
  44. GRB 060313: Possible optical counterpart
  45. GRB 060313: Swift XRT position
  46. GRB 060313, SMARTS optical/IR observations
  47. GRB060313: optical and near infrared observations with REM
  48. GRB 060313: Swift-BAT detection of a bright short hard burst
  49. GRB060218: SARA Observations of SN2006aj
  50. GRB060312: Swift UVOT observation
  51. GRB 060312: Refined analysis of the Swift-BAT burst
  52. GRB 060218/SN 2006aj, high resolution spectra
  53. GRB 060312: Swift XRT team refined analysis
  54. GRB060306: APO Ks-band Imaging Observations
  55. GRB 060312: ROTSE-III Optical Limits
  56. GRB 060312: Swift detection of a burst
  57. IBAS Alert n. 3218 : not a real GRB
  58. GRB 060306: SOAR Ks Observations
  59. Bright short hard GRB 060303: IPN localization and Konus spectrum
  60. GRB060219: Liverpool Telescope observations
  61. GRB 060306: MAGNUM observations
  62. GRB060218: analysis of the XMM-Newton observation
  63. Swift/UVOT observations of GRB060306
  64. GRB 060306: Swift-BAT refined analysis
  65. GRB 060306: Swift-XRT team refined analysis
  66. GRB 060306: PROMPT Observations
  67. GRB 060306: Swift detection of a bright burst
  68. GRB 060218: RTT150 optical observations
  69. GRB060218: Ep,i - Eiso correlation
  70. GRB060218: R-band CCD photmetry
  71. GRB060223b: optical limit
  72. GRB060218/SN 2006aj: optical observation in V
  73. GRB060218/SN 2006aj: optical observation
  74. GRB 060121: HST observations
  75. GRB 060218 : GMRT observation [Correction and Improvement]
  76. GRB 060223b: Swift/UVOT Upper Limits
  77. GRB 060218/SN 2006aj: K-380 optical observations
  78. GRB 060218/SN 2006aj, SMARTS optical/IR observations
  79. GRB200618: optical polarimetry and photometry
  80. GRB 060223B: Swift XRT possible afterglow
  81. GRB 060218/SN 2006aj: ABT observations
  82. GRB 060218/SN 2006aj: REM optical and near-infrared observations
  83. GRB 060218 : Radio upper limits from GMRT
  84. GRB 060218/SN 2006aj: WIRO optical observations
  85. GRB 060218/SN 2006aj: RBO optical observations
  86. GRB 060204B: GETS early limit
  87. GRB 060218: Refined analysis of the radio afterglow
  88. GRB 060223A:Xinglong optical limits
  89. GRB 060223B: ART optical limits
  90. GRB 060223B: Swift-BAT refined analysis
  91. GRB 060223a: Swift/UVOT refined analysis
  92. GRB 060223: Swift XRT Team preliminary analysis
  93. GRB 060218/SN 2006aj: Swift-BAT fluence and peak flux
  94. GRB 060223B: Swift detection of a bright burst
  95. GRB 060223: Swift-BAT refined analysis
  96. GRB 060218: rebrightening
  97. Correction to GCN 4816 on GRB060218
  98. GRB 060218/SN 2006aj: optical observations
  99. GRB060218: Optical brightening in V and R
  100. GRB 060223: Keck redshift

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