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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"

43681 results found.

  1. GRB 050520: P200 Observations
  2. GRB050520: Liverpool Telescope follow-up
  3. RBO Observations of GRB050520
  4. GRB 050520: TAROT optical limit
  5. GRB 050520: Swift XRT position
  6. GRB 050520: VLT/ULTRACAM observations
  7. GRB 050520: OSN optical observations
  8. GRB 050520 - A long GRB detected with INTEGRAL
  9. No Swift-BAT Lightcurves in real-time for next 3 weeks
  10. Swift-BAT trigger 122203 is not a real GRB
  11. XRF 050509C: REM NIR and Optical refined analysis
  12. GRB 050504: Swift XRT afterglow candidate has faded
  13. XRF 050509c optical afterglow
  14. GRB 050509B and short GRB-SN association? (corrected)
  15. GRB 050509B and short GRB-SN association?
  16. GRB050502b: Early Observation
  17. GRB050509b, Bok telescope B-band imaging
  18. Refined Chandra analysis of GRB 050509b
  19. GRB050509b, SDSS pre-burst observations
  20. GRB 050509b: Keck/Chandra Cross-Correlation
  21. GRB 050509b: Keck/Chandra Cross-Correlation
  22. Chandra observation of GRB 050509b
  23. GRB 050509b: RAPTOR deep, early limits.
  24. GRB050509B: Optical/Infared observations
  25. GRB 050509b: Swift/UVOT follow-up measurements
  26. GRB 050509b Milagro GeV/TeV Observations
  27. GRB050509B: Optical observations at the Very Large Telescope
  28. GRB 050509b: No Optical Variability in XRT Error Circle
  29. GRB050416: Afterglow detection at 188 nm with Swift UVOT
  30. GRB 050509a: Swift-BAT refined analysis
  31. GRB 050509c: ROTSE-III Optical Limits
  32. GRB 050509B: WSRT Radio Observations
  33. GRB 050505, early TAROT observation
  34. GRB050509c (=H3751): An X-Ray Flash Localized By HETE
  35. GRB 050509b: Further Analysis of Keck LRIS Images
  36. GRB050509c: REM NIR and Optical observations
  37. GRB 050509b: Physical Properties of the Candidate Host galaxy
  38. GRB 050505: SARA Observations
  39. Swift UVOT Follow-up Observations of GRB 050509B
  40. GRB 050509B, Optical Observations
  41. GRB 050509B: Swift/XRT refined analysis
  42. GRB050509a: Swift UVOT observations
  43. GRB 050509b: Optical observations
  44. GRB 050509b: Precision Astrometry
  45. GRB 050509b: Possible Optical Counterpart
  46. Keck/DEIMOS Spectrum of Possible Host Galaxy for GRB050509b
  47. GRB 050509A: Optical observations
  48. GRB 050509b: Optical Counterpart Candidate
  49. GRB050509b: Radio Observations
  50. GRB 050509b: PAIRITEL and WIYN Observations
  51. GRB 050509b: Swift-BAT refined analysis of the short hard burst
  52. GRB 050509b: optical observations
  53. GRB 050509b: Swift XRT Position
  54. GRB 050509B: ROTSE-III Optical Limits
  55. Swift Detection of GRB050509b: A short duration burst
  56. GRB 050509a: Swift XRT Position
  57. Swift Detection of the Burst GRB050509
  58. Swift-BAT detection of GRB 050507
  59. GRB 050505: Keck I-band Magnitude
  60. GRB 050505: early time observations
  61. GRB 050505 - Faulkes Telescope North observations
  62. GRB 050502a: Swift XRT Upper Limit
  63. GRB 050505, simultaneous optical observation
  64. GRB050505: Infrared observations
  65. GRB 050505: Further Swift UVOT observations.
  66. GRB050505: AAVSO observations
  67. GRB050416A : 1 GHz limit from GMRT
  68. GRB 050505: Keck absorption spectrum and redshift (z=4.27)
  69. GRB 050505: Swift XRT Position
  70. GRB050505 Swift-BAT refined analysis
  71. GRB 050502a: Optical Observations
  72. GRB 050416b:Swift XRT afterglow upper limits
  73. GRB 050416b:Swift XRT afterglow upper limits
  74. Swift-BAT detection of GRB050505
  75. GRB 050504: Swift XRT position
  76. GRB050502b: Afterglow Confirmation: Correction to OT Coordinates
  77. GRB050502b: Afterglow Confirmation
  78. GRB050502: P200 Observations (Correction)
  79. GRB050502: P200 Observations
  80. GRB 050504 : R band observation at Lulin observatory
  81. Swift UVOT observation of GRB 050504
  82. GRB050504: Faulkes North optical robotic limit
  83. GRB 050502b, V band Observations
  84. GRB050504: P60 Observations
  85. GRB 050504: A long GRB detected with INTEGRAL
  86. GRB (?) 050504: IR Observations, Intriguing Source
  87. GRB050502a: P60 Observations (Correction)
  88. Renewal of SGR 1806-20 activity
  89. GRB 050502a: RBO Observations
  90. GRB 050502A: WSRT Radio Observations
  91. GRB050502A: Optical Observations
  92. GRB050502B Swift-BAT refined analysis
  93. GRB050502B: I band source in XRT error circle
  94. Swift UVOT refined analysis
  95. Retraction of Swift-BAT trigger 116145
  96. GRB 050502b : optical observation at Lulin observatory
  97. GRB 050502b: Swift XRT Position
  98. GRB 050502A: Redshift measurement based on Keck HIRES Observations
  99. GRB050502B: Optical Limits from ANU 1m
  100. Swift Detection of the Bright Burst GRB050502b

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