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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').
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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"
  1. Correction to GCN Circ 3502 on GRB 050528
  2. GRB050528: updated Liverpool Telescope limits
  3. Swift-BAT GRB 050528: a soft burst
  4. Update on Swift-BAT GRB 050528 (Trigger 130679)
  5. GRB050528: BOOTES optical candidate (retraction)
  6. GRB050504: Ashra-P2/3 monitor and Ashra-AFT response
  7. GRB050528: BOOTES optical candidate
  8. Possible GRB050528: no candidate from Liverpool Telescope
  9. Swift-BAT detection of possible GRB 050528
  10. GRB050525a: Radio Observations
  11. GRB 050509b: refined XRT/Chandra afterglow position analysis
  12. GRB 050525: RTT150, Optical observations
  13. GRB050525a: optical upper limits
  14. GRB 050525a: SARA Observations
  15. GRB 050525B: Swift-BAT observations
  16. GRB 050525: MITSuME Optical Observation in VRI
  17. GRB 050525a: MDM Observations
  18. GRB050525A,optical observation
  19. GRB 050525 : Lulin optical afterglow observations
  20. GRB050525: Super-LOTIS observations
  21. GRB 050525, spectral lag pseudo-redshift
  22. GRB 050525a: Gemini/GMOS Spectra
  23. GRB050306: optical afterglow not confirmed
  24. GRB 050525: BART optical observation
  25. GRB 050525A: BOOTES simultaneous optical observations
  26. GRB 050525A: Swift-BAT refined analysis
  27. GRB050525: Optical observations
  28. GRB 050525B: INTEGRAL shows it is unrelated to GRB050525A
  29. Subject : GRB 050525: pseudo-redshift
  30. Swift/UVOT UV and optical detections of GRB 050525
  31. Konus-Wind observation of GRB 050525
  32. GRB 050525: TAROT observations of the early afterglow
  33. INTEGRAL detection of GRB 050525
  34. GRB 050525, infrared observations
  35. GRB 050525: Optical observation
  36. GRB 050525: observatons of the optical afterglow
  37. GRB050525: ROTSE-III Refined Analysis
  38. GRB 050525 - Very Bright, Not Short
  39. GRB 050525: Swift Detection of a Bright, Possibly Short Burst
  40. GRB 050525A: ROTSE-III Detection of Possible Counterpart
  41. XRF050522: NIR observations of XRT candidate
  42. XRF 050522: Swift XRT refined analysis
  43. XRF050522: Radio Observations
  44. Swift/UVOT observation of XRF 050522
  45. GRB 050509A: Further I-band imaging
  46. GRB050522,optical observation
  47. GRB050520,optical observation
  48. XRF 050522: Continued NIR P200 Monitoring
  49. RBO Observations of GRB050522
  50. GRB050509b: optical observations
  51. Recent GRB BVRcIc field photometry
  52. GRB050520: Radio Observations
  53. XRF 050522: Swift XRT observation
  54. XRF050522, BVRcIc field photometry
  55. XRF 050522 : Lulin observations
  56. XRF050522: Optical Observations
  57. XRF050522: Near-infrared Observations
  58. XRF 050522: KAIT observations
  59. XRF 050522 detected with INTEGRAL
  60. GRB 050520: VLT/ULTRACAM observations
  61. Swift UVOT Observations of GRB 050520
  62. GRB 050520: Swift XRT refined analysis
  63. XRF050509C: Chandra Afterglow Detection
  64. XRF 050509c: Swift XRT Upper Limit
  65. XRF050509c: Radio Observations
  66. RBO Observations of GRB050520
  67. GRB 050520: P200 Observations
  68. GRB050520: Liverpool Telescope follow-up
  69. RBO Observations of GRB050520
  70. GRB 050520: TAROT optical limit
  71. GRB 050520: Swift XRT position
  72. GRB 050520: VLT/ULTRACAM observations
  73. GRB 050520: OSN optical observations
  74. GRB 050520: BART optical limit
  75. GRB 050520 - A long GRB detected with INTEGRAL
  76. No Swift-BAT Lightcurves in real-time for next 3 weeks
  77. Swift-BAT trigger 122203 is not a real GRB
  78. XRF 050509C: REM NIR and Optical refined analysis
  79. GRB 050504: Swift XRT afterglow candidate has faded
  80. XRF 050509c optical afterglow
  81. GRB 050509B and short GRB-SN association? (corrected)
  82. GRB 050509B and short GRB-SN association?
  83. GRB 050509B: Subaru Optical Observations
  84. GRB050502b: Early Observation
  85. GRB050509b, Bok telescope B-band imaging
  86. Refined Chandra analysis of GRB 050509b
  87. GRB050509b, SDSS pre-burst observations
  88. GRB 050509b: Keck/Chandra Cross-Correlation
  89. GRB 050509b: Keck/Chandra Cross-Correlation
  90. Chandra observation of GRB 050509b
  91. GRB 050509b: RAPTOR deep, early limits.
  92. GRB050509B: Optical/Infared observations
  93. GRB 050509b: Swift/UVOT follow-up measurements
  94. GRB 050509b Milagro GeV/TeV Observations
  95. GRB050509B: Optical observations at the Very Large Telescope
  96. GRB 050509b: No Optical Variability in XRT Error Circle
  97. GRB050416: Afterglow detection at 188 nm with Swift UVOT
  98. GRB 050509a: Swift-BAT refined analysis
  99. GRB 050509c: ROTSE-III Optical Limits
  100. GRB 050509B: WSRT Radio Observations

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