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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"

21931 results found.

  1. GRB 050607: RAPTOR-S Early Optical Limits
  2. GRB 050525a, Mid-Infrared Observations
  3. GRB 050607: Optical decay and spectral slope
  4. GRB 050607: MDM Observations
  5. GRB 050607 - XRT refined data analysis
  6. Optical Afterglow of GRB 050607
  7. GRB050607: P60 Observations
  8. GRB050607: prompt REM observations
  9. GRB 050603: prediction of t_break
  10. GRB 050603 - XRT data analysis of the first day
  11. GRB 050603: Analysis of UVOT data
  12. GRB050603: Fading Afterglow observed by Swift UVOT
  13. GRB050603, submillimetre observations
  14. GRB 050603: Swift XRT Position
  15. GRB 050603: Swift-BAT refined analysis of a long three-spiked burst
  16. Swift/BAT Detection of GRB050603
  17. GRB 050408: jet break in the XRT light curve
  18. GRB 050525a, infrared observations
  19. GRB 050525a, SMARTS optical/IR afterglow observations
  20. GRB050528, XRT observations
  21. GRB050528: updated Liverpool Telescope limits
  22. Possible GRB050528: no candidate from Liverpool Telescope
  23. GRB050525a: Radio Observations
  24. GRB 050509b: refined XRT/Chandra afterglow position analysis
  25. GRB 050525: RTT150, Optical observations
  26. GRB 050525a: SARA Observations
  27. GRB 050525B: Swift-BAT observations
  28. GRB 050525a: MDM Observations
  29. GRB 050525 : Lulin optical afterglow observations
  30. GRB050525: Super-LOTIS observations
  31. GRB 050525a: Gemini/GMOS Spectra
  32. GRB050306: optical afterglow not confirmed
  33. GRB 050525A: BOOTES simultaneous optical observations
  34. GRB050525: Optical observations
  35. GRB 050525: TAROT observations of the early afterglow
  36. GRB 050525, infrared observations
  37. GRB 050525: observatons of the optical afterglow
  38. GRB 050525: Swift Detection of a Bright, Possibly Short Burst
  39. GRB 050525A: ROTSE-III Detection of Possible Counterpart
  40. XRF050522: NIR observations of XRT candidate
  41. XRF 050522: Swift XRT refined analysis
  42. XRF050522: Radio Observations
  43. XRF 050522: Continued NIR P200 Monitoring
  44. RBO Observations of GRB050522
  45. GRB050509b: optical observations
  46. GRB050520: Radio Observations
  47. XRF 050522: Swift XRT observation
  48. XRF050522, BVRcIc field photometry
  49. XRF 050522 : Lulin observations
  50. XRF050522: Optical Observations
  51. XRF050522: Near-infrared Observations
  52. XRF 050522: KAIT observations
  53. GRB 050520: VLT/ULTRACAM observations
  54. Swift UVOT Observations of GRB 050520
  55. XRF 050509c: Swift XRT Upper Limit
  56. XRF050509c: Radio Observations
  57. RBO Observations of GRB050520
  58. GRB 050520: P200 Observations
  59. RBO Observations of GRB050520
  60. GRB 050520: TAROT optical limit
  61. GRB 050520: Swift XRT position
  62. GRB 050520: VLT/ULTRACAM observations
  63. GRB 050520: OSN optical observations
  64. GRB 050504: Swift XRT afterglow candidate has faded
  65. XRF 050509c optical afterglow
  66. GRB 050509B and short GRB-SN association? (corrected)
  67. GRB 050509B and short GRB-SN association?
  68. GRB 050509B: Subaru Optical Observations
  69. GRB050509b, Bok telescope B-band imaging
  70. GRB050509b, SDSS pre-burst observations
  71. GRB 050509b: Keck/Chandra Cross-Correlation
  72. Chandra observation of GRB 050509b
  73. GRB050509B: Optical/Infared observations
  74. GRB 050509b Milagro GeV/TeV Observations
  75. GRB050509B: Optical observations at the Very Large Telescope
  76. GRB 050509b: No Optical Variability in XRT Error Circle
  77. GRB050416: Afterglow detection at 188 nm with Swift UVOT
  78. GRB 050509B: WSRT Radio Observations
  79. GRB050509c: REM NIR and Optical observations (errata corrige to GCN 3400)
  80. GRB 050505, early TAROT observation
  81. GRB 050509b: Further Analysis of Keck LRIS Images
  82. GRB050509c: REM NIR and Optical observations
  83. GRB 050509b: Physical Properties of the Candidate Host galaxy
  84. GRB 050505: SARA Observations
  85. Swift UVOT Follow-up Observations of GRB 050509B
  86. GRB 050509B, Optical Observations
  87. GRB050509a: Swift UVOT observations
  88. GRB 050509b: Optical observations
  89. GRB 050509b: Precision Astrometry
  90. GRB 050509b: Possible Optical Counterpart
  91. Keck/DEIMOS Spectrum of Possible Host Galaxy for GRB050509b
  92. GRB 050509A: Optical observations
  93. GRB 050509b: Optical Counterpart Candidate
  94. GRB050509b: Radio Observations
  95. GRB 050509b: PAIRITEL and WIYN Observations
  96. GRB 050509b: Swift-BAT refined analysis of the short hard burst
  97. GRB 050509b: optical observations
  98. GRB 050509b: Swift XRT Position
  99. Swift Detection of GRB050509b: A short duration burst
  100. Swift Detection of the Burst GRB050509

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