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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"

41916 results found.

  1. GRB 050509B: Subaru Optical Observations
  2. GRB050502b: Early Observation
  3. GRB050509b, Bok telescope B-band imaging
  4. Refined Chandra analysis of GRB 050509b
  5. GRB050509b, SDSS pre-burst observations
  6. GRB 050509b: Keck/Chandra Cross-Correlation
  7. GRB 050509b: Keck/Chandra Cross-Correlation
  8. Chandra observation of GRB 050509b
  9. GRB 050509b: RAPTOR deep, early limits.
  10. GRB050509B: Optical/Infared observations
  11. GRB 050509b: Swift/UVOT follow-up measurements
  12. GRB 050509b Milagro GeV/TeV Observations
  13. GRB050509B: Optical observations at the Very Large Telescope
  14. GRB 050509b: No Optical Variability in XRT Error Circle
  15. GRB050416: Afterglow detection at 188 nm with Swift UVOT
  16. GRB 050509a: Swift-BAT refined analysis
  17. GRB 050509c: ROTSE-III Optical Limits
  18. GRB 050509B: WSRT Radio Observations
  19. GRB050509c: REM NIR and Optical observations (errata corrige to GCN 3400)
  20. GRB 050505, early TAROT observation
  21. GRB050509c (=H3751): An X-Ray Flash Localized By HETE
  22. GRB 050509b: Further Analysis of Keck LRIS Images
  23. GRB050509c: REM NIR and Optical observations
  24. GRB 050509b: Physical Properties of the Candidate Host galaxy
  25. GRB 050505: SARA Observations
  26. Swift UVOT Follow-up Observations of GRB 050509B
  27. GRB 050509B, Optical Observations
  28. GRB 050509B: Swift/XRT refined analysis
  29. GRB050509a: Swift UVOT observations
  30. GRB 050509b: Optical observations
  31. GRB 050509b: Precision Astrometry
  32. GRB 050509b: Possible Optical Counterpart
  33. GRB 050509A: Optical observations
  34. GRB 050509b: Optical Counterpart Candidate
  35. GRB050509b: Radio Observations
  36. GRB 050509b: PAIRITEL and WIYN Observations
  37. GRB 050509b: Swift-BAT refined analysis of the short hard burst
  38. GRB 050509b: optical observations
  39. GRB 050509b: Swift XRT Position
  40. GRB 050509B: ROTSE-III Optical Limits
  41. Swift Detection of GRB050509b: A short duration burst
  42. GRB 050509a: Swift XRT Position
  43. Swift Detection of the Burst GRB050509
  44. Swift-BAT detection of GRB 050507
  45. GRB 050505: Keck I-band Magnitude
  46. GRB 050505: early time observations
  47. GRB 050505 - Faulkes Telescope North observations
  48. GRB 050502a: Swift XRT Upper Limit
  49. GRB 050505, simultaneous optical observation
  50. GRB050505: Infrared observations
  51. GRB 050505: Further Swift UVOT observations.
  52. GRB050505: AAVSO observations
  53. GRB050416A : 1 GHz limit from GMRT
  54. GRB 050505: Keck absorption spectrum and redshift (z=4.27)
  55. GRB 050505 UVOT
  56. GRB050505: Optical Afterglow Candidate
  57. GRB 050505: Swift XRT Position
  58. GRB050505 Swift-BAT refined analysis
  59. GRB 050502a: Optical Observations
  60. GRB 050416b:Swift XRT afterglow upper limits
  61. GRB 050416b:Swift XRT afterglow upper limits
  62. Swift-BAT detection of GRB050505
  63. GRB 050504: Swift XRT position
  64. GRB050502b: Afterglow Confirmation: Correction to OT Coordinates
  65. GRB050502b: Afterglow Confirmation
  66. GRB050502: P200 Observations (Correction)
  67. GRB050502: P200 Observations
  68. GRB 050504 : R band observation at Lulin observatory
  69. Swift UVOT observation of GRB 050504
  70. GRB 050504, R band Observations
  71. GRB050504: Faulkes North optical robotic limit
  72. GRB 050502b, V band Observations
  73. GRB050504: P60 Observations
  74. GRB 050504: A long GRB detected with INTEGRAL
  75. GRB (?) 050504: IR Observations, Intriguing Source
  76. GRB 050502b, Optical observations
  77. GRB050502a: P60 Observations (Correction)
  78. GRB050502a: P60 Observations
  79. Renewal of SGR 1806-20 activity
  80. GRB 050502a: RBO Observations
  81. GRB 050502A: WSRT Radio Observations
  82. GRB050502A: Optical Observations
  83. GRB050502B Swift-BAT refined analysis
  84. GRB050502B: I band source in XRT error circle
  85. Swift UVOT refined analysis
  86. Retraction of Swift-BAT trigger 116145
  87. GRB 050502a : R band observation at Lulin observatory
  88. GRB 050502b : optical observation at Lulin observatory
  89. GRB 050502b: Swift XRT Position
  90. GRB050502B: Optical Limits from ANU 1m
  91. Swift Detection of the Bright Burst GRB050502b
  92. GRB 050502: INTEGRAL results
  93. GRB050502: ANU 1m optical Observations
  94. GRB 050502: Confirmed variability of the afterglow candidate +
  95. GRB 050502: PAIRITEL IR Observations
  96. GRB 050502 - A long GRB detected with INTEGRAL
  97. GRB 050502: ROTSE-III Detection of Possible Counterpart
  98. Swift-BAT Trigger 115881 is not a real GRB
  99. Swift/BAT possible detection of a weak burst GRB050430
  100. GRB 050401: Rc observation

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