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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"

32736 results found.

  1. GRB 050603 - XRT data analysis of the first day
  2. Konus-Wind observation of GRB 050603
  3. GRB 050603: Analysis of UVOT data
  4. GRB050603: Fading Afterglow observed by Swift UVOT
  5. GRB050603, submillimetre observations
  6. GRB 050603: Swift XRT Position
  7. GRB050603: Radio Detection
  8. GRB 050603: Swift-BAT refined analysis of a long three-spiked burst
  9. GRB 050603: Afterglow Identification from LCO
  10. GRB 050603: INTEGRAL shows it is not a short GRB
  11. GRB 050408: jet break in the XRT light curve
  12. GRB 050525a, infrared observations
  13. GRB 050525a, SMARTS optical/IR afterglow observations
  14. Correction to GCN Circ 3502 on GRB 050528
  15. Swift-BAT GRB 050528: a soft burst
  16. Update on Swift-BAT GRB 050528 (Trigger 130679)
  17. GRB050528: BOOTES optical candidate (retraction)
  18. GRB050504: Ashra-P2/3 monitor and Ashra-AFT response
  19. GRB050525a: Radio Observations
  20. GRB 050509b: refined XRT/Chandra afterglow position analysis
  21. GRB050525a: optical upper limits
  22. GRB 050525a: SARA Observations
  23. GRB 050525B: Swift-BAT observations
  24. GRB 050525: MITSuME Optical Observation in VRI
  25. GRB 050525a: MDM Observations
  26. GRB050525A,optical observation
  27. GRB 050525 : Lulin optical afterglow observations
  28. GRB050525: Super-LOTIS observations
  29. GRB 050525, spectral lag pseudo-redshift
  30. GRB 050525a: Gemini/GMOS Spectra
  31. GRB050306: optical afterglow not confirmed
  32. GRB 050525: BART optical observation
  33. GRB 050525A: BOOTES simultaneous optical observations
  34. GRB 050525A: Swift-BAT refined analysis
  35. GRB050525: Optical observations
  36. GRB 050525B: INTEGRAL shows it is unrelated to GRB050525A
  37. Swift/UVOT UV and optical detections of GRB 050525
  38. Konus-Wind observation of GRB 050525
  39. GRB 050525: TAROT observations of the early afterglow
  40. INTEGRAL detection of GRB 050525
  41. GRB 050525, infrared observations
  42. GRB 050525: Optical observation
  43. GRB 050525: observatons of the optical afterglow
  44. GRB050525: ROTSE-III Refined Analysis
  45. GRB 050525 - Very Bright, Not Short
  46. GRB 050525: Swift Detection of a Bright, Possibly Short Burst
  47. GRB 050525A: ROTSE-III Detection of Possible Counterpart
  48. XRF050522: NIR observations of XRT candidate
  49. XRF 050522: Swift XRT refined analysis
  50. XRF050522: Radio Observations
  51. Swift/UVOT observation of XRF 050522
  52. GRB 050509A: Further I-band imaging
  53. XRF 050522: Continued NIR P200 Monitoring
  54. RBO Observations of GRB050522
  55. GRB050520: Radio Observations
  56. XRF 050522: Swift XRT observation
  57. XRF050522, BVRcIc field photometry
  58. XRF 050522 : Lulin observations
  59. XRF050522: Optical Observations
  60. XRF050522: Near-infrared Observations
  61. XRF 050522: KAIT observations
  62. GRB 050520: VLT/ULTRACAM observations
  63. Swift UVOT Observations of GRB 050520
  64. GRB 050520: Swift XRT refined analysis
  65. XRF050509C: Chandra Afterglow Detection
  66. XRF 050509c: Swift XRT Upper Limit
  67. XRF050509c: Radio Observations
  68. RBO Observations of GRB050520
  69. GRB 050520: P200 Observations
  70. GRB050520: Liverpool Telescope follow-up
  71. GRB 050520: TAROT optical limit
  72. GRB 050520: Swift XRT position
  73. GRB 050520: VLT/ULTRACAM observations
  74. GRB 050520: OSN optical observations
  75. No Swift-BAT Lightcurves in real-time for next 3 weeks
  76. Swift-BAT trigger 122203 is not a real GRB
  77. XRF 050509C: REM NIR and Optical refined analysis
  78. GRB 050504: Swift XRT afterglow candidate has faded
  79. XRF 050509c optical afterglow
  80. GRB 050509B and short GRB-SN association? (corrected)
  81. GRB 050509B and short GRB-SN association?
  82. GRB 050509B: Subaru Optical Observations
  83. GRB050502b: Early Observation
  84. GRB050509b, Bok telescope B-band imaging
  85. Refined Chandra analysis of GRB 050509b
  86. GRB050509b, SDSS pre-burst observations
  87. GRB 050509b: Keck/Chandra Cross-Correlation
  88. Chandra observation of GRB 050509b
  89. GRB 050509b: RAPTOR deep, early limits.
  90. GRB050509B: Optical/Infared observations
  91. GRB 050509b: Swift/UVOT follow-up measurements
  92. GRB 050509b Milagro GeV/TeV Observations
  93. GRB050509B: Optical observations at the Very Large Telescope
  94. GRB 050509b: No Optical Variability in XRT Error Circle
  95. GRB050416: Afterglow detection at 188 nm with Swift UVOT
  96. GRB 050509a: Swift-BAT refined analysis
  97. GRB 050509c: ROTSE-III Optical Limits
  98. GRB 050509B: WSRT Radio Observations
  99. GRB050509c: REM NIR and Optical observations (errata corrige to GCN 3400)
  100. GRB 050505, early TAROT observation

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