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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').

10641 results found.

  1. GRB 071227: Suzaku WAM observation of the prompt emission
  2. Konus-Wind observation of GRB 071227
  3. GRB 071227: Swift-XRT refined analysis
  4. GRB 071227: Swift detection of a burst
  5. GRB 071125: Suzaku WAM observation of the prompt emission
  6. Konus-Wind and Konus-A observations of GRB 071125
  7. IPN triangulation of very bright GRB 071125
  8. Disregard the "GRB 071126" position
  9. GRB071122: Swift/UVOT Observations
  10. GRB 071122: ROTSE-III Optical Limits
  11. GRB071118 MITSuME OAO optical observation
  12. GRB 071117: Swift-XRT revised position
  13. Konus-Wind and Konus-A observations of GRB 071117
  14. Swift/UVOT upper limits for GRB 071117
  15. GRB 071117: Gemini Optical Afterglow Discovery
  16. GRB 071118, Swift-BAT refined analysis
  17. GRB 071117: TAROT La Silla observatory optical observations
  18. GRB 071118: Swift detection of a burst
  19. GRB 071117: Gemini Observations
  20. GRB 071117: Swift-XRT refined analysis
  21. GRB 071117: Swift/XRT position
  22. GRB 071112C: Optical and NIR data observed with KANATA
  23. GRB071112C: Errata of MITSuME Ic band photometry
  24. GRB 071112C: optical observation
  25. GRB071112C MITSuME Okayama Optical Observation
  26. GRB 071112B: Magellan i-band imaging
  27. GRB071112C Xinglong_TNT_and_EST_afterglow observations
  28. GRB 071112B: ROTSE-III Rapid Optical Limits
  29. GRB 071112: Swift detection of a possible burst
  30. GRB 071109: IBIS refined analysis
  31. GRB 071109: BOOTES-2 prompt optical observations
  32. GRB 071109: A long GRB detected by INTEGRAL
  33. GRB 071104: Gamma Ray Burst Localization by SuperAGILE
  34. GRB 071101, Swift-BAT refined analysis
  35. GRB0711101: Two new source from Xinglong TNT observation
  36. GRB 071020: MITSuME Akeno optical observations
  37. GRB 071028: Swift detection of a burst
  38. GRB 071025: Kuiper Telescope Optical Observations
  39. GRB 071018: Revised BAT position
  40. GRB071020, optical upper limit
  41. GRB 071025: Swift-XRT Team refined analysis
  42. GRB 060602A: host redshift
  43. GRB 071025: Early Super-LOTIS Observations
  44. Optical observations of GRB 071020
  45. GRB071021: MITSuME Okayama Optical Upper Limits
  46. GRB 071010B: Fading quickly
  47. Konus-Wind observation of GRB 071020
  48. GRB 071020A: IR Imaging with PAIRITEL
  49. GRB071010b: optical observations
  50. GRB 071018, Swift-BAT refined analysis
  51. GRB 071010B: Suzaku WAM observation of the prompt emission
  52. GRB 071017: a SHORT GRB detected by INTEGRAL
  53. GRB 071013: Optical observations
  54. GRB071013: optical limit
  55. GRB 20071013: Xinglong TNT optical Upper Limit
  56. GRB 071010C Swift-BAT detection of a burst
  57. GRB 071011: MARGE Optical Limits
  58. GRB 071010B: Gemini Spectroscopic Observations
  59. Optical Observation: GRB 071010
  60. Optical observations: GRB 071010A
  61. Konus-Wind observation of GRB 071010B
  62. GRB071010B: Swift/XRT detection
  63. GRB 071010B, Swift-BAT refined analysis
  64. GRB071008: optical observations
  65. GRB 071010B: Swift detection of a burst
  66. GRB 071010, Swift-BAT refined analysis
  67. Konus-Wind observation of GRB 071006
  68. GRB071008: Swift-XRT observation
  69. GRB 071010: Keck Observations of the Afterglow
  70. GRB 071008: Swift detection of a burst
  71. GRB 070810B: further XRT analysis
  72. Konus-Wind observation of GRB 071003
  73. GRB 071003: Possible rebrightening
  74. GRB 071003: KAIT optical afterglow observations
  75. GRB 071001, Swift-BAT refined analysis
  76. Disregard the Swift-XRT Notices today
  77. GRB 070920B: ROTSE-III Early Optical Limits
  78. GRB 070925: a long GRB detected by INTEGRAL
  79. Recent SGR1806-20 Activity
  80. INTEGRAL ToO observations of SGR1806-20
  81. GRB 070920B, Swift-BAT refined analysis
  82. SGR1806-20: Swift-BAT detection of enhanced activity
  83. Konus-Wind observation of GRB 070917
  84. GRB 070917: KAIT optical limits
  85. GRB 070911: Suzaku WAM observation of the prompt emission
  86. GRB 070913: Swift detection of a burst
  87. IPN search for a GRB associated with TAROT transient on August 31
  88. Intense burst from SGR 1806-20 detected on September 7
  89. GRB 070809: Confirmation of optical transient
  90. Orphan GRB candidate in IC 4779 at TAROT La Silla observatory
  91. Konus-Wind observation of GRB 070824
  92. GRB 070824 - Combined SuperAGILE/IPN Localization
  93. Konus-Wind observation of very bright GRB 070821
  94. IPN Localization of GRB 070821 (long, very bright)
  95. GRB 070810B: Xinglong TNT optical Upper Limit
  96. GRB 070809: Swift/UVOT Upper Limits
  97. GRB 070810B: Swift detection of a short burst
  98. GRB 070810: Swift detection of a burst
  99. GRB 070809: ROTSE-III Optical Limits
  100. GRB 070808: Swift XRT refined analysis

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