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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"

42810 results found.

  1. SGR 1806-20: low frequency GMRT results of 2005 Jan 16.
  2. GRB 050126: Radio Observations
  3. GRB050128 Swift-BAT observations
  4. GRB 050128: Swift XRT prompt afterglow position
  5. HETE #3667: P60 Observations
  6. GRB 050124: K-band afterglow observations
  7. GRB050126: Burst Parameters Measured by BAT
  8. GRB 050126: Detection of NIR afterglow with Keck/NIRC
  9. GRB 050126: Prompt XRT detection and localization
  10. GRB 050124: NIR afterglow confirmed with Keck/NIRC
  11. GRB050124: No Swift UVOT Detection of Afterglow Emission
  12. GRB 050117a: Radio Observations
  13. GRB 050124: NIR Candidates from Keck/NIRC
  14. GRB050124,optical observation
  15. GRB050124: Updated Swift XRT Position and Fluxes
  16. GRB 050124: Swift XRT Detection of X-ray Afterglow Emission
  17. GRB050124: Refined BAT position, spectral and fluence information
  18. GRB050124: Swift-BAT position of a double-peaked burst
  19. GRB050123,optical observation
  20. GRB 050123: KAIT observations
  21. GRB050123: P60 Observations
  22. GRB 050123(=H3666): A GRB Localized in Real Time by HETE
  23. CFHTLS optical transient unlikely to be a GRB
  24. Unusual optical transient (GRB ???)
  25. GRB050117a: Radio Observations
  26. GRB050117a: Refined analysis
  27. GRB 041224 and GRB 041226: BOOTES-2 simultaneous observations
  28. GRB050117: Palomar WIRC Ks-band observations
  29. GRB050117b: Swift-BAT detection of a weak burst
  30. GRB050117: optical observation
  31. GRB 050117, I-band observations
  32. GRB 050117: Optical observation
  33. GRB050117: Refined XRT position
  34. GRB050117: Swift-BAT detection of a long multi-peaked burst
  35. GRB050117: Swift XRT Position
  36. SGR 1806-20: RXTE/PCA pulse frequency during flare
  37. Triangulation of Short Hard GRB050112 (large error box)
  38. SGR 1806-20: Further VLA Observations
  39. SGR 1806-20: Further low frequency GMRT results
  40. SGR 1806-20: Further VLA Observations
  41. SGR1806-20: Swift-BAT observations of two additional bursts
  42. SGR1806: Optical Transient Candidates in SOHO/LASCO Images
  43. Further VLA observations of SGR 1806-20
  44. SGR 1806-20 and extragalactic short-duration GRBs
  45. Further ATCA observations of SGR 1806-20
  46. Fourth Epoch VLA observations of SGR 1806-20
  47. SGR 1806-20: Temporal and Spectral behavior of radio transient
  48. ATCA observations of SGR 1806-20
  49. SGR 1806-20, RHESSI observations of the 041227 giant flare
  50. Third epoch observations of SGR 1806-20 with VLA
  51. Second Epoch VLA observations of SGR 1806-20
  52. Second-epoch VLA observations of SGR 1806-20
  53. SGR1806: Detection of a Sudden Ionospheric Disturbance
  54. DETECTION OF POLARIZATION OF THE RADIO EMISSION FROM SGR 1806-20
  55. VLA observations of SGR 1806-20
  56. SGR1806 VLA Observations
  57. VLA observations of SGR 1806-20
  58. SGR1806-20: RXTE-PCA observation of the 041227 super-flare
  59. GRB 041217: Optical observations
  60. SGR1806-20: Swift-BAT observation of the 041227 super-flare
  61. GRB041219, early time observations
  62. Detection of the SGR 1806-20 giant outburst back-scattered by the
  63. The giant outburst from SGR 1806-20
  64. IPN localization of giant flare from SGR1806-20
  65. Giant flare from SGR 1806-20 detected by INTEGRAL
  66. GRB041228: ROTSE-III Optical Observations
  67. GRB041228: Swift-BAT detection of a burst
  68. GRB041219; RXTE ASM Observations
  69. NIR Observations of GRB 041219
  70. GRB041226: ROTSE-III Optical Observations
  71. GRB041226: Swift-BAT detection of a burst
  72. GRB041223: decay of the afterglow
  73. GRB041224: ROTSE-III Optical Observations
  74. GRB 041224: near-infrared observations with REM
  75. GRB 041223: XRT afterglow spectrum and light curve
  76. GRB 041223 Fluence measured by Swift-BAT
  77. GRB041224: Swift-BAT detection of a soft burst
  78. GRB041223: optical and NIR observations with REM
  79. Swift-BAT Time History of GRB041219
  80. GRB 041219: TAROT optical observations
  81. GRB 041218: TAROT optical observations
  82. GRB 041223: J-band observations of the afterglow
  83. GRB 041223: Detection of Optical Transient with LCO40
  84. GRB041223: Swift XRT Detection of X-ray Afterglow Emission
  85. GRB 041219c: PROMPT Observations
  86. GRB041223: ROTSE-III Optical Observations
  87. GRB041223: Swift-BAT detection of a bright long burst
  88. GRB 041218: optical observations
  89. GRB 041219: Second Epoch WSRT Radio Observations
  90. GRB 041219: WSRT Radio Afterglow Detection
  91. GRB 041219: Keck IR Observations and Astrometric Refinement of the
  92. GRB 041218: Optical observations
  93. GRB041220: Swift-BAT burst
  94. Deep RAPTOR observations during GRB 041219
  95. GRB 041218 Optical Observations
  96. GRB 041219 Optical Observations
  97. GRB041219c: Third Burst in One Day from Swift-BAT
  98. GRB041219: Optical Afterglow Detection
  99. GRB041219: Continued NIR Observations
  100. GRB041219b: A Swift-BAT burst

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