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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.

Advanced Search Examples (click to copy):

subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

28096 results found.

  1. GRB050712: XRT refined analysis
  2. GRB050709: Radio Observations
  3. GRB 050709: Swift UVOT and XRT observations
  4. GRB 050712: Swift-BAT Refined Analysis
  5. GRB050712: UVOT candidate optical counterpart
  6. GRB 050709: LCO40 Observations
  7. GRB050709, optical observations
  8. PROMPT Rc Observations of GRB 050709
  9. GRB 050525a: PROMPT VRcIc Detections
  10. GRB 050525a: ARC 3.5-meter Optical and NIR Observations
  11. GRB 050525a: ARC 3.5-Meter SPIcam Field Calibration
  12. GRB 050626: Swift XRT observations
  13. GRB 050408: ARC 3.5-meter NIR Observations
  14. GRB 050701: Refined XRT analysis
  15. Swift UVOT observations of GRB 050701
  16. GRB050701: Swift-BAT Refined analysis
  17. Swift trigger 143708 is really GRB 050701
  18. GRB 050607, radio observations
  19. H11603: An X-ray flare from V4641 Sgr, or a possible XRF
  20. GRB050525a: HST Observations
  21. H3800 and H3801 on 2005 June 11: two bursts from SGR1806-20 localized by HETE
  22. XRF 050509c: Optical monitoring
  23. Konus-Wind observation of an intermediate burst from SGR 1806-20
  24. XRF050509c: Radio Detection
  25. GRB 050607 optical decay
  26. GRB050607: refined analysis of prompt REM observations
  27. GRB 050607: PROMPT VRcIc Observations
  28. GRB 050607: Optical decay and spectral slope
  29. GRB050607,optical observation
  30. Optical Afterglow of GRB 050607
  31. GRB050607: Swift Detection of a long GRB
  32. GRB050607: prompt REM observations
  33. Limits on a SN in the field of GRB 050509b
  34. GRB 050603 - XRT data analysis of the first day
  35. GRB050603, submillimetre observations
  36. GRB050603: Radio Detection
  37. GRB 050603: Swift-BAT refined analysis of a long three-spiked burst
  38. GRB 050603: INTEGRAL shows it is not a short GRB
  39. GRB 050525a, infrared observations
  40. GRB050528, XRT observations
  41. GRB050528: updated Liverpool Telescope limits
  42. Swift-BAT GRB 050528: a soft burst
  43. GRB050504: Ashra-P2/3 monitor and Ashra-AFT response
  44. Possible GRB050528: no candidate from Liverpool Telescope
  45. GRB050525a: Radio Observations
  46. GRB 050509b: refined XRT/Chandra afterglow position analysis
  47. GRB 050525: RTT150, Optical observations
  48. GRB 050525a: SARA Observations
  49. GRB 050525B: Swift-BAT observations
  50. GRB 050525: MITSuME Optical Observation in VRI
  51. GRB050525A,optical observation
  52. GRB050525: Super-LOTIS observations
  53. GRB 050525, spectral lag pseudo-redshift
  54. GRB050306: optical afterglow not confirmed
  55. GRB 050525: BART optical observation
  56. GRB 050525A: BOOTES simultaneous optical observations
  57. GRB 050525A: Swift-BAT refined analysis
  58. GRB050525: Optical observations
  59. GRB 050525B: INTEGRAL shows it is unrelated to GRB050525A
  60. Konus-Wind observation of GRB 050525
  61. GRB 050525: TAROT observations of the early afterglow
  62. INTEGRAL detection of GRB 050525
  63. GRB 050525, infrared observations
  64. GRB 050525: observatons of the optical afterglow
  65. GRB050525: ROTSE-III Refined Analysis
  66. GRB 050525: Swift Detection of a Bright, Possibly Short Burst
  67. XRF050522: Radio Observations
  68. Swift/UVOT observation of XRF 050522
  69. GRB 050509A: Further I-band imaging
  70. GRB050522,optical observation
  71. GRB050520,optical observation
  72. XRF 050522: Continued NIR P200 Monitoring
  73. RBO Observations of GRB050522
  74. Recent GRB BVRcIc field photometry
  75. GRB050520: Radio Observations
  76. XRF 050522: Swift XRT observation
  77. XRF050522, BVRcIc field photometry
  78. XRF050522: Optical Observations
  79. XRF050522: Near-infrared Observations
  80. GRB 050520: VLT/ULTRACAM observations
  81. GRB 050520: Swift XRT refined analysis
  82. XRF050509C: Chandra Afterglow Detection
  83. XRF050509c: Radio Observations
  84. GRB 050520: P200 Observations
  85. GRB 050520: TAROT optical limit
  86. GRB 050520: VLT/ULTRACAM observations
  87. XRF 050509c optical afterglow
  88. GRB 050509B and short GRB-SN association? (corrected)
  89. GRB 050509B and short GRB-SN association?
  90. GRB050502b: Early Observation
  91. GRB050509b, Bok telescope B-band imaging
  92. Refined Chandra analysis of GRB 050509b
  93. GRB050509b, SDSS pre-burst observations
  94. GRB 050509b: Keck/Chandra Cross-Correlation
  95. GRB 050509b: Keck/Chandra Cross-Correlation
  96. Chandra observation of GRB 050509b
  97. GRB 050509b: RAPTOR deep, early limits.
  98. GRB050509B: Optical observations at the Very Large Telescope
  99. GRB 050509b: No Optical Variability in XRT Error Circle
  100. GRB 050509a: Swift-BAT refined analysis

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