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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"

32702 results found.

  1. GRB 050709: Spectroscopy
  2. GRB 050713A: RAPTOR detection of early optical emission
  3. GRB050713B :Swift/UVOT observations
  4. GRB050713b: XRT refined analysis
  5. GRB050712: TNG R-band observations
  6. GRB 050713B: Swift-BAT Refined Analysis
  7. Swift-BAT Trigger 145729 is not a GRB
  8. GRB 050713A: Swift/UVOT observation
  9. GRB 050713A : Swift-BAT Refined Analysis
  10. GRB050712: Swift UVOT Observation of Afterglow Emission
  11. GRB 050713A XMM-Newton observation
  12. GRB 050713b : Lulin R-band observations
  13. GRB050713B: Faulkes North Telescope observation
  14. RBO RI observations of GRB 050713A
  15. GRB050709 : Chandra source optical counterpart
  16. GRB050713: Liverpool Telescope prompt observations
  17. GRB 050712, optical observations
  18. GRB050709: Candidate X-ray Afterglow from Chandra
  19. GRB 050713: ARC NIR Detections and Identification of Fading
  20. GRB050713: possible I-band afterglow
  21. GRB 050713A: ROTSE-III Optical Limits
  22. GRB050712: XRT refined analysis
  23. GRB050709: Radio Observations
  24. GRB 050709: Swift UVOT and XRT observations
  25. GRB 050712: Swift-BAT Refined Analysis
  26. GRB050712: UVOT candidate optical counterpart
  27. GRB 050712: Swift XRT afterglow position
  28. GRB 050709: LCO40 Observations
  29. GRB050709, optical observations
  30. GRB050709: A Possible Short-Hard GRB Localized by HETE
  31. GRB 050525a: PROMPT VRcIc Detections
  32. GRB 050525a: ARC 3.5-meter Optical and NIR Observations
  33. GRB 050626 optical observations
  34. GRB 050701
  35. GRB 050701, optical observations
  36. GRB 050408: ARC 3.5-meter NIR Observations
  37. GRB 050701: Refined XRT analysis
  38. Swift UVOT observations of GRB 050701
  39. GRB050701: Swift-BAT Refined analysis
  40. GRB 050701: Swift XRT afterglow position
  41. GRB 050607, radio observations
  42. H11603: An X-ray flare from V4641 Sgr, or a possible XRF
  43. GRB 050626 - Correction to GCN 3552
  44. GRB 050626 - a long GRB detected with INTEGRAL
  45. GRB 050525A: Swift Late-Time Decay Rate
  46. GRB050525a: HST Observations
  47. CORRECTION: GRB050603 Swift UVOT Afterglow Observations
  48. H3800 and H3801 on 2005 June 11: two bursts from SGR1806-20 localized by HETE
  49. XRF 050509c: Optical monitoring
  50. XRF050509c: Radio Detection
  51. GRB 050416(a): Host Galaxy Redshift Determination
  52. GRB 050607: MDM Observation
  53. GRB 050607: RTT150 optical observations
  54. GRB050607: refined analysis of prompt REM observations
  55. Swift/UVOT observations of GRB050607
  56. GRB 050607 : Lulin R-band observation
  57. GRB 050607: PROMPT VRcIc Observations
  58. GRB 050607: RAPTOR-S Early Optical Limits
  59. GRB050607: KAIT optical limits
  60. GRB 050525a, Mid-Infrared Observations
  61. GRB 050607: MDM Observations
  62. GRB050607,optical observation
  63. GRB 050607 - XRT refined data analysis
  64. GRB 050603: prediction of t_break
  65. Limits on a SN in the field of GRB 050509b
  66. GRB 050603: Redshift
  67. GRB 050603 - XRT data analysis of the first day
  68. Konus-Wind observation of GRB 050603
  69. GRB 050603: Analysis of UVOT data
  70. GRB050603: Fading Afterglow observed by Swift UVOT
  71. GRB050603, submillimetre observations
  72. GRB 050603: Swift XRT Position
  73. GRB050603: Radio Detection
  74. GRB 050603: Swift-BAT refined analysis of a long three-spiked burst
  75. GRB 050603: Afterglow Identification from LCO
  76. GRB 050603: INTEGRAL shows it is not a short GRB
  77. GRB 050408: jet break in the XRT light curve
  78. GRB 050525a, infrared observations
  79. GRB 050525a, SMARTS optical/IR afterglow observations
  80. Correction to GCN Circ 3502 on GRB 050528
  81. Swift-BAT GRB 050528: a soft burst
  82. Update on Swift-BAT GRB 050528 (Trigger 130679)
  83. GRB050528: BOOTES optical candidate (retraction)
  84. GRB050504: Ashra-P2/3 monitor and Ashra-AFT response
  85. GRB050525a: Radio Observations
  86. GRB 050509b: refined XRT/Chandra afterglow position analysis
  87. GRB050525a: optical upper limits
  88. GRB 050525a: SARA Observations
  89. GRB 050525B: Swift-BAT observations
  90. GRB 050525: MITSuME Optical Observation in VRI
  91. GRB 050525a: MDM Observations
  92. GRB050525A,optical observation
  93. GRB 050525 : Lulin optical afterglow observations
  94. GRB050525: Super-LOTIS observations
  95. GRB 050525, spectral lag pseudo-redshift
  96. GRB 050525a: Gemini/GMOS Spectra
  97. GRB050306: optical afterglow not confirmed
  98. GRB 050525: BART optical observation
  99. GRB 050525A: BOOTES simultaneous optical observations
  100. GRB 050525A: Swift-BAT refined analysis

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