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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"

36196 results found.

  1. GRB050525: Optical observations
  2. GRB 050525B: INTEGRAL shows it is unrelated to GRB050525A
  3. GRB 050525: pseudo-redshift
  4. Swift/UVOT UV and optical detections of GRB 050525
  5. Konus-Wind observation of GRB 050525
  6. GRB 050525: TAROT observations of the early afterglow
  7. INTEGRAL detection of GRB 050525
  8. GRB 050525, infrared observations
  9. GRB 050525: Optical observation
  10. GRB 050525: observatons of the optical afterglow
  11. GRB050525: ROTSE-III Refined Analysis
  12. GRB 050525 - Very Bright, Not Short
  13. GRB 050525: Swift Detection of a Bright, Possibly Short Burst
  14. GRB 050525A: ROTSE-III Detection of Possible Counterpart
  15. XRF050522: NIR observations of XRT candidate
  16. XRF050522: Radio Observations
  17. GRB 050509A: Further I-band imaging
  18. GRB050522,optical observation
  19. GRB050520,optical observation
  20. XRF 050522: Continued NIR P200 Monitoring
  21. RBO Observations of GRB050522
  22. GRB050509b: optical observations
  23. Recent GRB BVRcIc field photometry
  24. GRB050520: Radio Observations
  25. XRF050522, BVRcIc field photometry
  26. XRF050522: Optical Observations
  27. XRF 050522: KAIT observations
  28. XRF 050522 detected with INTEGRAL
  29. GRB 050520: VLT/ULTRACAM observations
  30. Swift UVOT Observations of GRB 050520
  31. GRB 050520: Swift XRT refined analysis
  32. RBO Observations of GRB050520
  33. GRB 050520: P200 Observations
  34. GRB050520: Liverpool Telescope follow-up
  35. GRB 050520: TAROT optical limit
  36. GRB 050520: Swift XRT position
  37. GRB 050520: VLT/ULTRACAM observations
  38. GRB 050520: OSN optical observations
  39. GRB 050520: BART optical limit
  40. GRB 050520 - A long GRB detected with INTEGRAL
  41. Swift-BAT trigger 122203 is not a real GRB
  42. GRB 050504: Swift XRT afterglow candidate has faded
  43. XRF 050509c optical afterglow
  44. GRB 050509B and short GRB-SN association? (corrected)
  45. GRB 050509B and short GRB-SN association?
  46. GRB 050509B: Subaru Optical Observations
  47. GRB050502b: Early Observation
  48. GRB050509b, Bok telescope B-band imaging
  49. Refined Chandra analysis of GRB 050509b
  50. GRB050509b, SDSS pre-burst observations
  51. GRB 050509b: Keck/Chandra Cross-Correlation
  52. GRB 050509b: Keck/Chandra Cross-Correlation
  53. Chandra observation of GRB 050509b
  54. GRB 050509b: RAPTOR deep, early limits.
  55. GRB050509B: Optical/Infared observations
  56. GRB 050509b: Swift/UVOT follow-up measurements
  57. GRB 050509b Milagro GeV/TeV Observations
  58. GRB050509B: Optical observations at the Very Large Telescope
  59. GRB 050509b: No Optical Variability in XRT Error Circle
  60. GRB 050509a: Swift-BAT refined analysis
  61. GRB 050509c: ROTSE-III Optical Limits
  62. GRB 050509B: WSRT Radio Observations
  63. GRB050509c: REM NIR and Optical observations (errata corrige to GCN 3400)
  64. GRB 050505, early TAROT observation
  65. GRB050509c (=H3751): An X-Ray Flash Localized By HETE
  66. GRB 050509b: Further Analysis of Keck LRIS Images
  67. GRB050509c: REM NIR and Optical observations
  68. GRB 050509b: Physical Properties of the Candidate Host galaxy
  69. GRB 050505: SARA Observations
  70. Swift UVOT Follow-up Observations of GRB 050509B
  71. GRB 050509B, Optical Observations
  72. GRB 050509B: Swift/XRT refined analysis
  73. GRB 050509b: Optical observations
  74. GRB 050509b: Precision Astrometry
  75. GRB 050509b: Possible Optical Counterpart
  76. Keck/DEIMOS Spectrum of Possible Host Galaxy for GRB050509b
  77. GRB 050509A: Optical observations
  78. GRB 050509b: Optical Counterpart Candidate
  79. GRB 050509b: PAIRITEL and WIYN Observations
  80. GRB 050509b: Swift-BAT refined analysis of the short hard burst
  81. GRB 050509b: optical observations
  82. GRB 050509b: Swift XRT Position
  83. GRB 050509B: ROTSE-III Optical Limits
  84. GRB 050509a: Swift XRT Position
  85. Swift-BAT detection of GRB 050507
  86. GRB 050505: Keck I-band Magnitude
  87. GRB 050505: early time observations
  88. GRB 050505 - Faulkes Telescope North observations
  89. GRB 050502a: Swift XRT Upper Limit
  90. GRB 050505, simultaneous optical observation
  91. GRB 050505: Further Swift UVOT observations.
  92. GRB050505: AAVSO observations
  93. GRB050416A : 1 GHz limit from GMRT
  94. GRB 050505: Keck absorption spectrum and redshift (z=4.27)
  95. GRB 050505 UVOT
  96. GRB050505: Optical Afterglow Candidate
  97. GRB 050505: Swift XRT Position
  98. GRB 050502a: Optical Observations
  99. GRB 050416b:Swift XRT afterglow upper limits
  100. GRB 050416b:Swift XRT afterglow upper limits

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