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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"

32551 results found.

  1. GRB 050219a: Refined XRT position
  2. GRB050219a: No Swift UVOT Detection of Afterglow Emission
  3. GRB 050219: Swift-BAT detection of a burst
  4. GRB050215b: Swift UVOT Detection of Afterglow Emission
  5. GRB 050215B: Radio Observations
  6. GRB 050215b: XRT confirmation of IR afterglow candidate
  7. GRB050215b: P60 Optical Observations
  8. GRB 050215b: Swift XRT Source Variability
  9. GRB 050215B: candidate afterglow
  10. GRB 050215b : Lulin follow-up observation
  11. GRB 050215b, BOOTES-2 simultaneous optical observations
  12. GRB 050215B: UKIRT K-band imaging
  13. GRB050215b: No Swift UVOT Detection of Afterglow Emission
  14. GRB050215a: No Swift UVOT Detection of Afterglow Emission
  15. GRB 050215b, BOOTES-1B optical limit
  16. GRB050215A: ROTSE-III Optical Observations
  17. GRB050209: TAROT optical observations
  18. short/hard GRB 050202, optical observations
  19. GRB050209: REM optical observations
  20. GRB 050209 I-band observation
  21. GRB050209: P60 Optical Observations
  22. GRB050209 (=U11568): A Long GRB Detected by HETE
  23. GRB 050128: Radio observations
  24. Further analysis of the short Swift-BAT GRB 050202
  25. GRB 050202: Second epoch radio observations
  26. GRB 050129: Optical observations
  27. GRB050202: Radio Observations
  28. GRB 050202: Optical observations with LCO40
  29. GRB 050128 Optical observation with REM
  30. GRB050128: Faulkes Telescope South observations
  31. GRB 050124: Radio Observations
  32. GRB 050128: near-infrared observations with REM
  33. GRB050128,optical observations
  34. GRB 050126: A NIR afterglow candidate in the revised XRT error circle
  35. GRB 050126: Radio Observations
  36. GRB050128 Swift-BAT observations
  37. GRB 050128: Swift XRT prompt afterglow position
  38. GRB 050124: K-band afterglow observations
  39. GRB050126: MASTER optical limit for KECK OT
  40. GRB050126: Burst Parameters Measured by BAT
  41. GRB050126: MASTER optical observations
  42. GRB 050126: Detection of NIR afterglow with Keck/NIRC
  43. GRB 050124: NIR afterglow confirmed with Keck/NIRC
  44. GRB050124: No Swift UVOT Detection of Afterglow Emission
  45. GRB 050124, SMARTS optical/IR observations
  46. GRB 050117a: Radio Observations
  47. GRB 050124 I-band observation
  48. GRB 050124: NIR Candidates from Keck/NIRC
  49. GRB050124,optical observation
  50. GRB 050124 : Lulin R-band follow-up observation
  51. GRB 050124: Swift XRT Detection of X-ray Afterglow Emission
  52. GRB050124: Refined BAT position, spectral and fluence information
  53. GRB 050123 : I-band follow-up observation
  54. GRB050123: optical limit 1.8h before GRB
  55. GRB 050123: KAIT observations
  56. GRB050123: P60 Observations
  57. CFHTLS optical transient unlikely to be a GRB
  58. GRB050117a: Radio Observations
  59. GRB050117a: Refined analysis
  60. GRB 041224 and GRB 041226: BOOTES-2 simultaneous observations
  61. GRB050117: Palomar WIRC Ks-band observations
  62. GRB050117: optical observation
  63. GRB 050117, I-band observations
  64. GRB 050117: Optical observation
  65. GRB050117: Refined XRT position
  66. GRB050117: MASTER optical observations
  67. MASTER:GRB050117 SWIFT
  68. GRB050117: Swift-BAT detection of a long multi-peaked burst
  69. SGR 1806-20: RXTE/PCA pulse frequency during flare
  70. SGR 1806-20: Further low frequency GMRT results
  71. SGR1806-20: Swift-BAT observations of two additional bursts
  72. SGR1806: Optical Transient Candidates in SOHO/LASCO Images
  73. Further VLA observations of SGR 1806-20
  74. SGR 1806-20 and extragalactic short-duration GRBs
  75. Fourth Epoch VLA observations of SGR 1806-20
  76. SGR 1806-20: Low frequency GMRT results; submission to GCN circulars
  77. SGR 1806-20: Temporal and Spectral behavior of radio transient
  78. ATCA observations of SGR 1806-20
  79. SGR 1806-20, RHESSI observations of the 041227 giant flare
  80. Third epoch observations of SGR 1806-20 with VLA
  81. Second Epoch VLA observations of SGR 1806-20
  82. Second-epoch VLA observations of SGR 1806-20
  83. SGR1806: Detection of a Sudden Ionospheric Disturbance
  84. DETECTION OF POLARIZATION OF THE RADIO EMISSION FROM SGR 1806-20
  85. VLA observations of SGR 1806-20
  86. SGR1806 VLA Observations
  87. VLA observations of SGR 1806-20
  88. SGR1806-20: RXTE-PCA observation of the 041227 super-flare
  89. GRB 041217: Optical observations
  90. GRB041219, early time observations
  91. The giant outburst from SGR 1806-20
  92. IPN localization of giant flare from SGR1806-20
  93. GRB041228: ROTSE-III Optical Observations
  94. GRB041219; RXTE ASM Observations
  95. NIR Observations of GRB 041219
  96. GRB041226: ROTSE-III Optical Observations
  97. GRB041223: decay of the afterglow
  98. GRB041224: ROTSE-III Optical Observations
  99. GRB 041224: near-infrared observations with REM
  100. GRB 041223: XRT afterglow spectrum and light curve

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