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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"

27576 results found.

  1. Swift/BAT detection of GRB 050716
  2. GRB050715: Refined analysis of the Swift-BAT burst
  3. GRB 050715: Swift-BAT detection
  4. Swift UVOT Observations of GRB 050714B
  5. Konus-Wind observation of GRB 050713A
  6. GRB 050714B: refined XRT analysis
  7. GRB050714B: Refined analysis of the Swift-BAT burst
  8. Swift detection of a long transient (GRB 050714B?)
  9. GRB 050714A: ROTSE-III Optical Limits
  10. GRB 050713A: XRT refined analysis
  11. GRB 050713A: RAPTOR detection of early optical emission
  12. GRB050713B :Swift/UVOT observations
  13. GRB050713b: XRT refined analysis
  14. GRB 050713B: Swift-BAT Refined Analysis
  15. Swift-BAT Trigger 145729 is not a GRB
  16. GRB 050713A: Swift/UVOT observation
  17. GRB 050713A : Swift-BAT Refined Analysis
  18. GRB050713B: Faulkes North Telescope observation
  19. RBO RI observations of GRB 050713A
  20. GRB 050713B
  21. GRB 050713: Swift detection of Bright Burst
  22. GRB 050713A: ROTSE-III Optical Limits
  23. GRB050712: XRT refined analysis
  24. GRB 050712: Swift-BAT Refined Analysis
  25. GRB050712: UVOT candidate optical counterpart
  26. GRB 050712: Swift XRT afterglow position
  27. GRB 050712: Swift detection of a weak burst
  28. GRB050709: A Possible Short-Hard GRB Localized by HETE
  29. GRB 050525a: PROMPT VRcIc Detections
  30. GRB 050525a: ARC 3.5-meter Optical and NIR Observations
  31. GRB 050701
  32. GRB 050701, optical observations
  33. GRB 050701: Refined XRT analysis
  34. Swift UVOT observations of GRB 050701
  35. GRB050701: Swift-BAT Refined analysis
  36. GRB 050701: Swift XRT afterglow position
  37. Swift trigger 143708 is really GRB 050701
  38. GRB 050525A: Swift Late-Time Decay Rate
  39. CORRECTION: GRB050603 Swift UVOT Afterglow Observations
  40. XRF 050509c: Optical monitoring
  41. Konus-Wind observation of an intermediate burst from SGR 1806-20
  42. GRB 050607 optical decay
  43. Swift/UVOT observations of GRB050607
  44. GRB 050607: PROMPT VRcIc Observations
  45. GRB 050607: RAPTOR-S Early Optical Limits
  46. GRB 050607: MDM Observations
  47. GRB050607,optical observation
  48. GRB 050607 - XRT refined data analysis
  49. GRB050607 optical limit by "Pi of the Sky"
  50. GRB050607: Swift Detection of a long GRB
  51. GRB050607: P60 Observations
  52. GRB 050603: prediction of t_break
  53. Konus-Wind observation of GRB 050603
  54. GRB050603: Fading Afterglow observed by Swift UVOT
  55. GRB 050603: Swift XRT Position
  56. GRB 050603: Swift-BAT refined analysis of a long three-spiked burst
  57. GRB 050603: Afterglow Identification from LCO
  58. Swift/BAT Detection of GRB050603
  59. GRB 050408: jet break in the XRT light curve
  60. GRB050528, XRT observations
  61. Correction to GCN Circ 3502 on GRB 050528
  62. Swift-BAT GRB 050528: a soft burst
  63. Update on Swift-BAT GRB 050528 (Trigger 130679)
  64. GRB050528: BOOTES optical candidate (retraction)
  65. GRB050504: Ashra-P2/3 monitor and Ashra-AFT response
  66. GRB050528: BOOTES optical candidate
  67. Possible GRB050528: no candidate from Liverpool Telescope
  68. Swift-BAT detection of possible GRB 050528
  69. GRB 050525B: Swift-BAT observations
  70. GRB050525A,optical observation
  71. GRB050525: Super-LOTIS observations
  72. GRB 050525, spectral lag pseudo-redshift
  73. GRB 050525A: BOOTES simultaneous optical observations
  74. GRB 050525A: Swift-BAT refined analysis
  75. Swift/UVOT UV and optical detections of GRB 050525
  76. Konus-Wind observation of GRB 050525
  77. GRB 050525 - Very Bright, Not Short
  78. GRB 050525: Swift Detection of a Bright, Possibly Short Burst
  79. GRB 050525A: ROTSE-III Detection of Possible Counterpart
  80. GRB 050509A: Further I-band imaging
  81. GRB050522,optical observation
  82. GRB050520,optical observation
  83. GRB 050520: VLT/ULTRACAM observations
  84. GRB 050520: BART optical limit
  85. No Swift-BAT Lightcurves in real-time for next 3 weeks
  86. Swift-BAT trigger 122203 is not a real GRB
  87. XRF 050509C: REM NIR and Optical refined analysis
  88. XRF 050509c optical afterglow
  89. GRB050502b: Early Observation
  90. GRB050509b, SDSS pre-burst observations
  91. GRB 050509b: RAPTOR deep, early limits.
  92. GRB 050509b: Swift/UVOT follow-up measurements
  93. GRB050509B: Optical observations at the Very Large Telescope
  94. GRB050416: Afterglow detection at 188 nm with Swift UVOT
  95. GRB 050509a: Swift-BAT refined analysis
  96. GRB 050509c: ROTSE-III Optical Limits
  97. GRB050509c (=H3751): An X-Ray Flash Localized By HETE
  98. GRB050509c: REM NIR and Optical observations
  99. Swift UVOT Follow-up Observations of GRB 050509B
  100. GRB 050509B: Swift/XRT refined analysis

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