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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"

11846 results found.

  1. GRB100414A: SAO RAS optical observations
  2. GRB 100418A: ROTSE-III Optical Limits
  3. GRB 100418A: Swift detection of a burst with a possible optical afterglow
  4. GRB 100414A: Suzaku WAM observation of the prompt emission
  5. Konus-Wind observation of GRB 100414B
  6. GRB 100415A: MAXI/GSC detection of a probable GRB
  7. GRB 100414A: Fermi GBM detection
  8. GRB100414A: Fermi LAT detection
  9. Konus-Wind observation of GRB 100413A
  10. Tentative redshift of GRB100413A from X-ray data
  11. GRB 100413A: Swift-XRT Refined Analysis
  12. GRB 100413: xinglong TNT optical upper limit
  13. GRB 100413A: MASTER-Net optical observations
  14. GRB 100413A: Swift detection of a burst
  15. GRB100401A: GROND Upper Limits
  16. MASTER observations on the Swift second trigger on LS V +44 17
  17. GRB 100331B: Swift/XRT possible afterglow candidate
  18. GRB 100331B: SuperAGILE Localization of a Long GRB
  19. INTEGRAL trigger 5994 / GRB 100331A: GROND detection of a variable source
  20. Konus-Wind observation of GRB 100324B
  21. GRB 100331A: A long GRB detected by INTEGRAL
  22. Konus-Wind observation of GRB 100322A
  23. Short X-ray Transient detected by MAXI/GSC
  24. Fermi/GBM and Swift/BAT detection of a burst from SGR 1806-20
  25. GRB 100325A: Fermi LAT detection
  26. GRB 100324A: GROND observations
  27. SGR 1833-0832: Archival Chandra Observations
  28. Discovery of the Spin Period of SGR 1833-0832
  29. GRB 100319A: correction to GCN 10527
  30. GRB 100219A: MASTER-Net optical alert observations
  31. GRB 100316D: Further Gemini observations
  32. GRB 100316B: Swift-XRT refined analysis
  33. Tentative redshift of GRB100316D from X-ray data
  34. GRB 100316C: Swift-XRT team refined analysis
  35. GRB 100316D: Swift XRT refined analysis
  36. GRB 100316A: Swift-XRT refined analysis
  37. GRB 100316A: Swift-BAT refined analysis
  38. GRB 100316B: Swift-BAT refined analysis
  39. GRB 100316C: BOOTES-3 observations
  40. XRF 100315A: MAXI/GSC detection of a short X-ray transient
  41. GRB 100316C: Swift detection of a burst
  42. GRB 100316B: Swift detection of a burst with optical counterpart
  43. GRB 100305A: Super-LOTIS early observations
  44. GRB 100305A: Swift-XRT refined analysis
  45. GRB 100305A Optical Observations
  46. GRB 100305A: Swift detection of a burst
  47. GRB 100302A: Swift-XRT refined analysis
  48. GRB 100302A: Optical observations at Crni Vrh
  49. GRB 100302A: Swift detection of a burst
  50. GRB 100224A SHB found in ground analysis of BAT data
  51. GRB 100225A: Fermi LAT detection
  52. GRB 100225A: Fermi GBM detection
  53. GRB
  54. GRB 100219A: XRT refined analysis
  55. GRB 100219A - Gemini South Spectroscopy
  56. GRB100219A Akeno and Okayama MITSuME Optical Observation
  57. GRB 100219A: GROND observations
  58. GRB 100219A: Swift detection of a burst
  59. GRB 100213B: Swift XRT refined analysis
  60. GRB 100213A: SARA observations
  61. GRB 100205A: Keck limits on an underlying host galaxy
  62. GRB 100206A: YNAO-GMG observations
  63. GRB 100206A: WHT candidate afterglow
  64. GRB 100205A: Swift XRT refined analysis
  65. GRB 100205A: Swift detection of a burst
  66. Short X-ray Transient detected by MAXI/GSC
  67. Konus-Wind observation of GRB 100119A
  68. GRB 100115A: Swift-XRT refined analysis
  69. Konus-Wind observation of GRB 100116A
  70. GRB 100117A: Swift-XRT refined analysis
  71. GRB 100117A: Swift detection of a short hard burst
  72. GRB 100116A: Fermi LAT detection
  73. GRB 100115A: SARA Afterglow Candidate
  74. GRB 100115A: Swift-XRT candidate afterglow
  75. GRB 100111A: PAIRITEL NIR Upper Limits
  76. GRB100111A: Swift-XRT refined analysis
  77. GRB 100111A: Swift detection of a burst with an optical afterglow
  78. GRB 100103A: GROND Upper Limits
  79. Konus-Wind observation of GRB 100103A
  80. GRB 100103A: a long GRB detected with INTEGRAL
  81. Swift Trigger 381591 is probably not a burst
  82. GRB 091221: Fermi GBM Observation
  83. GRB 091221 Swift-BAT refined analysis
  84. GRB 091221: ROTSE-III Detection of Optical Counterpart
  85. GRB 091221: Swift detection of a burst
  86. Konus-Wind observation of GRB 091208A
  87. GRB 091208B: GAO 150cm telescope Optical Observation
  88. GRB 091208B: optical observations
  89. GRB091208B: NOT optical observations
  90. GRB 091208B: Swift-XRT refined analysis
  91. GRB 091208B: Swift detection of a burst with an optical afterglow
  92. GRB 091208: ROTSE-III Optical Limits
  93. Short X-ray Transient, RIMOTS optical upper limits
  94. GRB 091109A: GROND confirmation of redshift z = 3.5
  95. GRB091202: Swift-XRT refined analysis
  96. GRB 091126A: Suzaku WAM observation of the prompt emission
  97. Short X-ray Transient Detection by MAXI/GSC
  98. Konus-Wind observation of very long GRB 091123
  99. Konus-Wind observation of GRB 091127
  100. GRB 091127: MASTER early optical transient polarimetry

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