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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"

11837 results found.

  1. Tentative redshift of GRB100413A from X-ray data
  2. GRB 100413A: Swift-XRT Refined Analysis
  3. GRB 100413: xinglong TNT optical upper limit
  4. GRB 100413A: MASTER-Net optical observations
  5. GRB 100413A: Swift detection of a burst
  6. GRB100401A: GROND Upper Limits
  7. MASTER observations on the Swift second trigger on LS V +44 17
  8. GRB 100331B: Swift/XRT possible afterglow candidate
  9. GRB 100331B: SuperAGILE Localization of a Long GRB
  10. INTEGRAL trigger 5994 / GRB 100331A: GROND detection of a variable source
  11. Konus-Wind observation of GRB 100324B
  12. GRB 100331A: A long GRB detected by INTEGRAL
  13. Konus-Wind observation of GRB 100322A
  14. Short X-ray Transient detected by MAXI/GSC
  15. Fermi/GBM and Swift/BAT detection of a burst from SGR 1806-20
  16. GRB 100325A: Fermi LAT detection
  17. GRB 100324A: GROND observations
  18. SGR 1833-0832: Archival Chandra Observations
  19. Discovery of the Spin Period of SGR 1833-0832
  20. GRB 100319A: correction to GCN 10527
  21. GRB 100219A: MASTER-Net optical alert observations
  22. GRB 100316D: Further Gemini observations
  23. GRB 100316B: Swift-XRT refined analysis
  24. Tentative redshift of GRB100316D from X-ray data
  25. GRB 100316C: Swift-XRT team refined analysis
  26. GRB 100316D: Swift XRT refined analysis
  27. GRB 100316A: Swift-XRT refined analysis
  28. GRB 100316A: Swift-BAT refined analysis
  29. GRB 100316B: Swift-BAT refined analysis
  30. GRB 100316C: BOOTES-3 observations
  31. XRF 100315A: MAXI/GSC detection of a short X-ray transient
  32. GRB 100316C: Swift detection of a burst
  33. GRB 100316B: Swift detection of a burst with optical counterpart
  34. GRB 100305A: Super-LOTIS early observations
  35. GRB 100305A: Swift-XRT refined analysis
  36. GRB 100305A Optical Observations
  37. GRB 100305A: Swift detection of a burst
  38. GRB 100302A: Swift-XRT refined analysis
  39. GRB 100302A: Optical observations at Crni Vrh
  40. GRB 100302A: Swift detection of a burst
  41. GRB 100224A SHB found in ground analysis of BAT data
  42. GRB 100225A: Fermi LAT detection
  43. GRB 100225A: Fermi GBM detection
  44. GRB
  45. GRB 100219A: XRT refined analysis
  46. GRB 100219A - Gemini South Spectroscopy
  47. GRB100219A Akeno and Okayama MITSuME Optical Observation
  48. GRB 100219A: GROND observations
  49. GRB 100219A: Swift detection of a burst
  50. GRB 100213B: Swift XRT refined analysis
  51. GRB 100213A: SARA observations
  52. GRB 100205A: Keck limits on an underlying host galaxy
  53. GRB 100206A: YNAO-GMG observations
  54. GRB 100206A: WHT candidate afterglow
  55. GRB 100205A: Swift XRT refined analysis
  56. GRB 100205A: Swift detection of a burst
  57. Short X-ray Transient detected by MAXI/GSC
  58. Konus-Wind observation of GRB 100119A
  59. GRB 100115A: Swift-XRT refined analysis
  60. Konus-Wind observation of GRB 100116A
  61. GRB 100117A: Swift-XRT refined analysis
  62. GRB 100117A: Swift detection of a short hard burst
  63. GRB 100116A: Fermi LAT detection
  64. GRB 100115A: SARA Afterglow Candidate
  65. GRB 100115A: Swift-XRT candidate afterglow
  66. GRB 100111A: PAIRITEL NIR Upper Limits
  67. GRB100111A: Swift-XRT refined analysis
  68. GRB 100111A: Swift detection of a burst with an optical afterglow
  69. GRB 100103A: GROND Upper Limits
  70. Konus-Wind observation of GRB 100103A
  71. GRB 100103A: a long GRB detected with INTEGRAL
  72. Swift Trigger 381591 is probably not a burst
  73. GRB 091221: Fermi GBM Observation
  74. GRB 091221 Swift-BAT refined analysis
  75. GRB 091221: ROTSE-III Detection of Optical Counterpart
  76. GRB 091221: Swift detection of a burst
  77. Konus-Wind observation of GRB 091208A
  78. GRB 091208B: GAO 150cm telescope Optical Observation
  79. GRB 091208B: optical observations
  80. GRB091208B: NOT optical observations
  81. GRB 091208B: Swift-XRT refined analysis
  82. GRB 091208B: Swift detection of a burst with an optical afterglow
  83. GRB 091208: ROTSE-III Optical Limits
  84. Short X-ray Transient, RIMOTS optical upper limits
  85. GRB 091109A: GROND confirmation of redshift z = 3.5
  86. GRB091202: Swift-XRT refined analysis
  87. GRB 091126A: Suzaku WAM observation of the prompt emission
  88. Short X-ray Transient Detection by MAXI/GSC
  89. Konus-Wind observation of very long GRB 091123
  90. Konus-Wind observation of GRB 091127
  91. GRB 091127: MASTER early optical transient polarimetry
  92. GRB 091127: Swift-XRT afterglow detection and analysis
  93. GRB 091127: TAROT La Silla observatory optical decay
  94. Konus-Wind observation of GRB 091120
  95. GRB 091120: MAXI GSC detection
  96. GRB 091120: Fermi GBM observation
  97. Konus-Wind observations of GRB 091117A
  98. Konus-Wind and Konus-RF observations of GRB 091031
  99. GRB 091031: Fermi LAT detection of a faint burst
  100. GRB 091112: Swift detection of a possible burst

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