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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"

45906 results found.

  1. GRB100414A: SAO RAS optical observations
  2. GRB 100418A: GROND observations; missing author list added
  3. GRB 100418A: GROND observations
  4. GRB 100418A: Swift-BAT refined analysis
  5. GRB 100418A: Enhanced Swift-XRT position
  6. GRB 100418A: ROTSE-III Optical Limits
  7. GRB 100418A: Swift detection of a burst with a possible optical afterglow
  8. GRB 100413A: Radio Afterglow Detection with the EVLA
  9. GRB 100414A: Suzaku WAM observation of the prompt emission
  10. GRB 100414A: Swift/UVOT Observations
  11. GRB 100414A: Gemini-N observation (correction)
  12. GRB 100414A: GROND Detection of the Optical Afterglow
  13. GRB 100414A: Gemini-N candidate and redshift
  14. GRB 100414A: Enhanced Swift-XRT position of candidate afterglow
  15. GRB 100413A: Suzaku WAM observation of the prompt emission
  16. GRB 100414A: Palomar Transient Factory Observations
  17. GRB 100413B: Swift Confirmation of Burst
  18. GRB 100414A: Swift-XRT detection of a possible X-ray afterglow
  19. GRB 100413A: Swift-BAT final refined analysis
  20. GRB 100414A: IPN Localization
  21. Konus-Wind observation of GRB 100414A (correction to GCN 10597)
  22. Konus-Wind observation of GRB 100414B
  23. GRB 100415A: MAXI/GSC detection of a probable GRB
  24. GRB 100414A: Fermi GBM detection
  25. GRB100414A: Fermi LAT detection
  26. GRB 100413B : Swift detection of a burst
  27. GRB 100413A: GROND Upper limits
  28. GRB 100413A: Swift/UVOT Upper Limits
  29. Konus-Wind observation of GRB 100413A
  30. GRB 100413A: Faulkes Telescope South observations
  31. Tentative redshift of GRB100413A from X-ray data
  32. GRB 100413A: SARA upper limit
  33. GRB 100413A: Swift-XRT Refined Analysis
  34. GRB 100413A: Swift-BAT initial refined analysis
  35. GRB 100413A: Enhanced Swift-XRT position
  36. GRB 100413: xinglong TNT optical upper limit
  37. GRB 100413A: MASTER-Net optical observations
  38. GRB 100413A: Swift detection of a burst
  39. Spin down rate and inferred dipole magnetic field of the new soft gamma-ray repeater SGR 1833-0832
  40. Swift-BAT trigger 419015 is not astrophysical
  41. Trigger 419015 is probably not a GRB
  42. GRB100401A: GROND Upper Limits
  43. INTEGRAL Alert n. 5995: MASTER-Net optical observations
  44. MASTER observations on the Swift second trigger on LS V +44 17
  45. IBAS Alert n. 5996: not a GRB
  46. IBAS Alert n. 5995: not a GRB
  47. GRB 100331B: GROND Upper limits
  48. Master-Net observations on the Swift trigger on LS V +44 17
  49. GRB 100401A: Swift/UVOT Upper Limit
  50. Swift/BAT trigger 417974 (GRB100401A): Swift/XRT observations
  51. GRB 100401A: Fermi GBM detection
  52. GRB 100401A Burst, possibly short, detected in ground analysis of BAT data
  53. GRB 100331B: BOOTES-3 observations
  54. GRB 100316A: R-band limit
  55. GRB 100324B: Suzaku WAM observation of the prompt emission
  56. GRB 100331B: Swift/UVOT Upper Limits
  57. GRB 100331B: Swift/XRT possible afterglow candidate
  58. Swift detection of LS V +44 17
  59. GRB 100331B: SuperAGILE Localization of a Long GRB
  60. INTEGRAL trigger 5994 (GRB100331A): Swift/XRT observations
  61. INTEGRAL trigger 5994 / GRB 100331A: GROND detection of a variable source
  62. GRB 100331A: BOOTES-3 observations
  63. Konus-Wind observation of GRB 100324B
  64. GRB 100331A: A long GRB detected by INTEGRAL
  65. IPN triangulation of GRB100324B
  66. Konus-Wind observation of GRB 100322A
  67. Short X-ray Transient detected by MAXI/GSC
  68. Fermi GBM detection of four Solar Flares
  69. GRB 100322A: Suzaku WAM observation of the prompt emission
  70. Fermi/GBM and Swift/BAT detection of a burst from SGR 1806-20
  71. GRB 100325A: Fermi LAT detection
  72. GROND observations of GRB100316D/SN2010bh
  73. GRB 100325A: Fermi GBM detection
  74. GRB 100324A: GROND observations
  75. GRB 100324A found in ground analysis of BAT data
  76. Emerging Supernova in the Afterglow of GRB 100316D
  77. GRB 100322B or possible Galactic transient detected in ground analysis of BAT data
  78. GRB 100316D: Spectroscopic Discovery of a Supernova from Magellan
  79. SGR 1833-0832: Swift/UVOT Upper Limits
  80. GRB 100322A: Fermi GBM detection
  81. SGR 1833-0832: Archival Chandra Observations
  82. SGR 1833-0832 is pulsed at 7.56 seconds
  83. SGR 1833-0832 is pulsed at 7.56 seconds
  84. Possible pulsation period in SGR 1833-0832
  85. Discovery of the Spin Period of SGR 1833-0832
  86. GRB 100316D: ATCA radio observations
  87. GRB 100319A: correction to GCN 10527
  88. Probable SGR 1833-0832: Swift-XRT refined analysis
  89. Probable SGR 1833-0832: Enhanced Swift-XRT position
  90. Swift-XRT refined position of the probable new SGR 1833-0832
  91. Swift-BAT refined analysis of the probable new SGR 1833-0832
  92. GRB 100219A: MASTER-Net optical alert observations
  93. GRB 100319A: Swift detection of a burst; possible SGR
  94. GRB 100316D: Possible Supernova
  95. GRB 100316D: Pre-burst emission measured by BAT
  96. GRB 100316D: Further Gemini observations
  97. GRB 100219A: optical upper limit
  98. GRB 100316A: optical observations in CrAO
  99. GRB 100316D: Swift/UVOT Observations
  100. GRB 100316D: Swift XRT enhanced position and further refined analysis

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