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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"

21468 results found.

  1. GRB 080604: Swift detection of a burst with an optical afterglow
  2. GRB 080516: TAROT La Silla observatory optical observations
  3. GRB 080603B: TAROT Calern observatory detection of a plateau in the light curve
  4. GRB 080603B: Swift detection of a burst with optical afterglow
  5. GRB 080603B: ROTSE-III Detection of Optical Counterpart
  6. SGR 1627-41: Chandra/RXTE/Swift Observations Scheduled
  7. GRB 080602, Swift-BAT refined analysis
  8. GRB 080602: Swift-XRT refined analysis
  9. Konus-Wind observation of GRB 080602
  10. GRB 080602: NOT R-band upper limit
  11. GRB 080602: Enhanced Swift-XRT position
  12. GRB 080602: Swift detection of a burst
  13. Swift analysis of BAT Slew Survey event (Trigger=009)
  14. Konus-Wind observation of reactivation of SGR 1627-41
  15. Reactivation of SGR 1627-41
  16. GRB 080524: Swift XRT and UVOT analysis
  17. GRB 080524: Swift-BAT detection of a burst in ground analysis
  18. GRB 080523: Swift-XRT refined analysis
  19. GRB 080523, Swift-BAT refined analysis
  20. GRB 080523: VLT optical observations
  21. Swift/UVOT observations of GRB 080523
  22. GRB 080523: Enhanced Swift-XRT position
  23. GRB 080523: Swift detection of a burst
  24. GRB 080515: KPNO 4m NIR afterglow detection
  25. GRB080521(?): detection of possible burst from BAT slew data and XRT ToO
  26. GRB 80516: Swift/UVOT Observations
  27. GRB 080515: Swift-XRT position and analysis
  28. GRB 080520, Swift-BAT refined analysis
  29. GRB 080514B: pseudo-z= 1.8 from prompt emission spectrum
  30. GRB 080514B: UVOT Observations
  31. GRB080520: Swift/UVOT observations
  32. GRB 080520, GROND observations
  33. GRB 080520: Enhanced Swift-XRT position
  34. GRB 080520: Swift XRT Refined Analysis
  35. GRB 080520: Swift detection of a burst with optical afterglow
  36. GRB 080514B: second epoch Swift XRT data confirms the X-ray afterglow
  37. GRB 080517, Swift-BAT refined analysis
  38. GRB 080517: Swift-XRT refined analysis
  39. GRB 080517: Enhanced Swift-XRT position
  40. GRB080517: Liverpool Telescope Optical Observations
  41. GRB 080517: Swift detection of a burst
  42. GRB 080516, GROND observations
  43. GRB 080516, SMARTS optical/IR observations
  44. GRB 080516: Swift-XRT Team refined analysis
  45. GRB 080516, Swift-BAT refined analysis
  46. GRB 080516: Enhanced Swift-XRT position
  47. GRB 080516: Swift detection of a burst
  48. Errartum: VLA upper limit on GRB 080507
  49. VLA upper limit on GRB 080705
  50. GRB 080514B : redshift estimation
  51. IPN triangulation of bright GRB 080513
  52. Swift-BAT refined analysis for Trigger 311603: Galactic source
  53. GRB 080515, Swift-BAT refined analysis
  54. GRB 080514B: Swift-XRT analysis
  55. GRB 080515: Swift detection of a burst
  56. GRB 080514B: possible AGILE detection at E>50 MeV
  57. Swift detection of a possible galactic transient
  58. GRB080514: REM NIR & Optical Observations
  59. GRB 080507: Suzaku WAM observation of the prompt emission
  60. GRB 080507: Swift XRT analysis confirms the X-ray afterglow
  61. GRB 080507: Keck photometry
  62. GRB 080503: Chandra Observation of X-ray Rebrightening or Flattening
  63. GRB080507: Swift/UVOT followup observations
  64. GRB 080507: Swift-XRT position of a possible afterglow
  65. GRB 080506: VLA radio upper limit
  66. GRB 080506: TLS 2nd Epoch - possible light curve break
  67. GRB 080506: Swift XRT refined analysis
  68. GRB080506: Swift/UVOT observations
  69. GRB 080506, Swift-BAT refined analysis
  70. GRB080503, RIMOTS optical upper limit
  71. GRB 080506: TLS afterglow detection in VRIZ
  72. GRB 080506: Enhanced Swift-XRT position
  73. GRB 080506: Swift detection of a burst with optical afterglow
  74. GRB 080503: Late-time Optical rebrightening (possible mini-SN)
  75. GRB 080503, Swift-BAT lag and time-resolved spectral analysis
  76. GRB080503: Swift/UVOT Upper Limits
  77. GRB080503 XRT refined analysis
  78. GRB 080503, Swift-BAT refined analysis
  79. GRB 080430
  80. GRB 080503: Enhanced Swift-XRT position
  81. GRB 080503: MITSuME Akeno optical upper limits
  82. GRB 080503: New candidate afterglow/host in Gemini imaging
  83. GRB 080503: Optical afterglow candidate and LRIS spectroscopy of the short burst
  84. GRB 080503: Swift detection of a short burst
  85. GRB 080411: Continued Swift Monitoring
  86. GRB 080430: Optical observations
  87. GRB080430: Swift/UVOT observations
  88. GRB 080430 optical observations
  89. GRB 080430, Swift-BAT refined analysis
  90. GRB 080430: Swift-XRT refined analysis
  91. GRB 080430: Enhanced Swift-XRT position
  92. GRB 080430 - SDSS Pre-Burst Observations
  93. GRB 080430: Swift detection of a burst with optical afterglow
  94. GRB 080430: TAROT Calern observatory optical observations
  95. GRB080426: Observations from CAHA
  96. GRB 080426: Swift-XRT refined analysis
  97. GRB080426: Swift/UVOT upper limits
  98. GRB 080426: Enhanced Swift-XRT position
  99. GRB 080426, Swift-BAT refined analysis
  100. GRB 080426: Swift detection of a possibly short burst

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