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GCN Circulars

GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. 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').

18344 results found.

  1. GRB 080205, Swift-BAT refined analysis
  2. IPN localization of very hard GRB 080204
  3. GRB 080205: Swift XRT refined analysis
  4. GRB 080205: OA evolution from KAIT observations
  5. GRB 080205: Swift/UVOT observations
  6. GRB 080205: Enhanced Swift-XRT position
  7. GRB 080205: KAIT OA detection
  8. GRB 080205: Swift detection of a burst
  9. Swift-BAT Trigger #302454, correction of GCN notice, update on AX J1749.1-2639
  10. GRB 080130: Swift-BAT refined analysis
  11. GRB 080130: further Swift XRT observations confirm fading source
  12. GRB 080129: Swift/UVOT Refined Upper Limits
  13. Swift/UVOT observations of GRB080130
  14. GRB 080130(?): Swift XRT observation
  15. GRB 080129: Swift-XRT refined analysis
  16. GRB 080129: KAIT optical limits
  17. GRB 080129, Swift-BAT refined analysis
  18. GRB 080129: TAROT La Silla observatory optical observations
  19. GRB 080129: Gemini-South photometry
  20. GRB 080129: GROND detection in all bands, and fading
  21. GRB 080129: GROND detection of the optical/NIR afterglow, and fading
  22. GRB 080129: Enhanced Swift-XRT position
  23. GRB 080129: Swift XRT position
  24. GRB 080129 (?): UVOT Upper Limits
  25. GRB 080129 (?): Swift detection of a possible burst
  26. A new website of high-level data products for Swift GRBs
  27. GRB 080121: Upper limit on X-ray afterglow
  28. GRB 080123 : Suzaku WAM observation of the prompt emission
  29. Swift trigger(=301779) is not a GRB
  30. GRB 080121: Swift/UVOT upper limits
  31. SNe 2008D and 2007uy: Chandra Detections
  32. GRB 080121: Enhanced Swift-XRT position
  33. Two non-burst Swift SubThreshold triggers
  34. IPN triangulation of GRB080122
  35. GRB 080121: Nearby SDSS galaxies
  36. GRB 080121: Swift-BAT detection of a very weak, short burst
  37. GRB 080123: Swift-XRT refined analysis
  38. GRB 080123: Swift/UVOT refined analysis
  39. GRB 080123, Swift-BAT refined analysis
  40. GRB 080123: Enhanced Swift-XRT position
  41. GRB 080123: Swift detection of a short burst
  42. VLA radio upper limit on GRB 080120
  43. GRB 080120: Swift-XRT refined analysis
  44. UVOT detection of GRB080120
  45. GRB 080120: GROND detection
  46. GRB080120: Swift XRT position
  47. Swift UVOT Monitoring of the SN 2008D Brightening (Transient in NGC 2770)
  48. Swift observations of the X-ray transient in NGC 2770 (aka SN2008D)
  49. XRB 080109/SN 2008D: Early decline in brightness and change in colors
  50. XRB 080109/SN 2008D:PAIRITEL NIR observations and t_0 from Swift
  51. XRF 080109 in NGC2770: Detectable Superluminal Motion
  52. XRF in NGC 2770: Search for X-ray periodicity
  53. Refined Swift-XRT analysis of the transient in NGC 2770
  54. Refined Swift UVOT Analysis of SN 2008D (Transient in NGC 2770)
  55. Swift UVOT Observations of the X-ray transient in NGC 2770
  56. Early OT detection of XRF in NGC 2770 in Asiago frames
  57. Bright X-ray Transient in NGC 2770 - A low-luminosity XRF?
  58. GRB 071227: Suzaku WAM observation of the prompt emission
  59. Further Swift-BAT analysis of GRB 071227
  60. Konus-Wind observation of GRB 071227
  61. GRB 071227: Swift-XRT refined analysis
  62. GRB071227: Swift/UVOT refined analysis
  63. Swift-BAT refined analysis of short GRB 071227
  64. GRB 071227: Swift detection of a burst
  65. GRB 070429B: Possible UVOT Detection of an Optical Afterglow
  66. Swift-BAT trigger 298308 is not a GRB
  67. GRB 071208?: Swift detection of a possible burst
  68. GRB 071129, Swift-BAT refined analysis
  69. GRB 071129: Swift detection of a burst
  70. GRB 071126: Enhanced Swift-XRT position
  71. VLA radio detection of GRB 071122
  72. GRB071122: Swift/UVOT Observations
  73. GRB 071122, Swift-BAT refined analysis
  74. GRB 071122 Swift XRT position update sent in error.
  75. GRB 071122 Swift-XRT refined analysis
  76. GRB 071122: ROTSE-III Optical Limits
  77. GRB 071122: Swift detection of a burst
  78. Swift/UVOT observations of GRB071118
  79. GRB 071117: Swift-XRT revised position
  80. Konus-Wind and Konus-A observations of GRB 071117
  81. Swift XRT follow-up observations of GRB071008
  82. Swift/UVOT upper limits for GRB 071117
  83. GRB071118: Swift XRT refined analysis
  84. GRB 071118, Swift-BAT refined analysis
  85. GRB 071117: TAROT La Silla observatory optical observations
  86. GRB 071118: Swift detection of a burst
  87. GRB 071117: Swift-XRT refined analysis
  88. GRB 071117, Swift-BAT refined analysis
  89. GRB 071117: Swift/XRT position
  90. GRB 071117: Initial Swift/UVOT observations
  91. GRB 071117: Swift detection of a bright burst
  92. Swift detection of MXB 0656-072
  93. VLA radio upper limit on GRB 071112C
  94. ATCA radio observations of short hard burst GRB 071112B
  95. Correction to the Swift-BAT Transient Identification (trigger=296683)
  96. GRB 071112C: Swift-BAT refined analysis
  97. GRB 071112C: Swift/UVOT observations
  98. GRB 071112C: Swift XRT refined analysis
  99. Swift UVOT upper limits of GRB071112B
  100. GRB 071112B: Swift-XRT preliminary analysis

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