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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"

42981 results found.

  1. GRB 050124: NIR Candidates from Keck/NIRC
  2. GRB050124: Updated Swift XRT Position and Fluxes
  3. GRB 050124: Swift XRT Detection of X-ray Afterglow Emission
  4. GRB050124: Refined BAT position, spectral and fluence information
  5. GRB050124: Swift-BAT position of a double-peaked burst
  6. GRB050123: optical limit 1.8h before GRB
  7. GRB 050123: KAIT observations
  8. GRB050123: P60 Observations
  9. GRB 050123(=H3666): A GRB Localized in Real Time by HETE
  10. CFHTLS optical transient unlikely to be a GRB
  11. Unusual optical transient (GRB ???)
  12. GRB050117a: Radio Observations
  13. GRB050117a: Refined analysis
  14. GRB 041224 and GRB 041226: BOOTES-2 simultaneous observations
  15. GRB050117: Palomar WIRC Ks-band observations
  16. GRB050117b: Swift-BAT detection of a weak burst
  17. GRB050117: optical observation
  18. GRB 050117, I-band observations
  19. GRB 050117: Optical observation
  20. GRB050117: Refined XRT position
  21. GRB050117: MASTER optical observations
  22. MASTER:GRB050117 SWIFT
  23. GRB050117: Swift-BAT detection of a long multi-peaked burst
  24. GRB050117: Swift XRT Position
  25. SGR 1806-20: RXTE/PCA pulse frequency during flare
  26. Triangulation of Short Hard GRB050112 (large error box)
  27. SGR 1806-20: Further VLA Observations
  28. SGR 1806-20: Further low frequency GMRT results
  29. SGR 1806-20: Further VLA Observations
  30. SGR1806-20: Swift-BAT observations of two additional bursts
  31. SGR1806: Optical Transient Candidates in SOHO/LASCO Images
  32. SGR 1806-20 and extragalactic short-duration GRBs
  33. Further ATCA observations of SGR 1806-20
  34. Fourth Epoch VLA observations of SGR 1806-20
  35. SGR 1806-20: Low frequency GMRT results; submission to GCN circulars
  36. SGR 1806-20: Temporal and Spectral behavior of radio transient
  37. ATCA observations of SGR 1806-20
  38. SGR 1806-20, RHESSI observations of the 041227 giant flare
  39. Second Epoch VLA observations of SGR 1806-20
  40. Second-epoch VLA observations of SGR 1806-20
  41. SGR1806: Detection of a Sudden Ionospheric Disturbance
  42. DETECTION OF POLARIZATION OF THE RADIO EMISSION FROM SGR 1806-20
  43. VLA observations of SGR 1806-20
  44. SGR1806 VLA Observations
  45. VLA observations of SGR 1806-20
  46. SGR1806-20: RXTE-PCA observation of the 041227 super-flare
  47. GRB 041217: Optical observations
  48. SGR1806-20: Swift-BAT observation of the 041227 super-flare
  49. GRB041219, early time observations
  50. Detection of the SGR 1806-20 giant outburst back-scattered by the
  51. The giant outburst from SGR 1806-20
  52. IPN localization of giant flare from SGR1806-20
  53. Giant flare from SGR 1806-20 detected by INTEGRAL
  54. GRB041228: ROTSE-III Optical Observations
  55. GRB041228: Swift-BAT detection of a burst
  56. GRB041219; RXTE ASM Observations
  57. NIR Observations of GRB 041219
  58. GRB041226: ROTSE-III Optical Observations
  59. GRB041226: Swift-BAT detection of a burst
  60. GRB041223: decay of the afterglow
  61. GRB 041224: near-infrared observations with REM
  62. GRB 041223: XRT afterglow spectrum and light curve
  63. GRB 041223 Fluence measured by Swift-BAT
  64. GRB041224: Swift-BAT detection of a soft burst
  65. GRB041223: optical and NIR observations with REM
  66. Swift-BAT Time History of GRB041219
  67. GRB 041219: TAROT optical observations
  68. GRB 041218: TAROT optical observations
  69. GRB 041223: J-band observations of the afterglow
  70. GRB 041223: Detection of Optical Transient with LCO40
  71. GRB041223: Swift XRT Detection of X-ray Afterglow Emission
  72. GRB 041219c: PROMPT Observations
  73. GRB041223: ROTSE-III Optical Observations
  74. GRB041223: Swift-BAT detection of a bright long burst
  75. GRB 041218: optical observations
  76. Very high activity of SGR 1806-20
  77. GRB 041219: Second Epoch WSRT Radio Observations
  78. GRB 041219: WSRT Radio Afterglow Detection
  79. GRB 041219: Keck IR Observations and Astrometric Refinement of the
  80. GRB 041218: Optical observations
  81. GRB 041219 : optical follow-up observations
  82. GRB041220: Swift-BAT burst
  83. Deep RAPTOR observations during GRB 041219
  84. GRB 041218 Optical Observations
  85. GRB 041219 Optical Observations
  86. GRB041219c: Third Burst in One Day from Swift-BAT
  87. GRB041219: Optical Afterglow Detection
  88. GRB041219: Continued NIR Observations
  89. GRB041219b: A Swift-BAT burst
  90. GRB 041219: Radio Afterglow Detection
  91. GRB 041218 : Radio Observations
  92. GRB 041218: R-band optical observations
  93. GRB041218: Liverpool Telescope optical observations
  94. GRB041218: optical observations
  95. GRB041219: Confirmed NIR Afterglow
  96. GRB041218: Continued P60 Optical Observations
  97. Swift-BAT detection of the bright long burst GRB041219
  98. GRB 041218: Optical Observation
  99. GRB 041219: Infrared Afterglow Candidate
  100. GRB041219, BVRcIc field calibration

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