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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"

39254 results found.

  1. GRB 100418A: ROTSE-III Optical Limits
  2. GRB 100418A: Swift detection of a burst with a possible optical afterglow
  3. GRB 100413A: Radio Afterglow Detection with the EVLA
  4. GRB 100414A: Suzaku WAM observation of the prompt emission
  5. GRB 100414A: Swift/UVOT Observations
  6. GRB 100414A: Gemini-N observation (correction)
  7. GRB 100414A: GROND Detection of the Optical Afterglow
  8. GRB 100414A: Gemini-N candidate and redshift
  9. GRB 100414A: Enhanced Swift-XRT position of candidate afterglow
  10. GRB 100413A: Suzaku WAM observation of the prompt emission
  11. GRB 100414A: Palomar Transient Factory Observations
  12. GRB 100413B: Swift Confirmation of Burst
  13. GRB 100414A: Swift-XRT detection of a possible X-ray afterglow
  14. GRB 100413A: Swift-BAT final refined analysis
  15. GRB 100414A: IPN Localization
  16. Konus-Wind observation of GRB 100414A (correction to GCN 10597)
  17. Konus-Wind observation of GRB 100414B
  18. GRB 100415A: MAXI/GSC detection of a probable GRB
  19. GRB 100414A: Fermi GBM detection
  20. GRB100414A: Fermi LAT detection
  21. GRB 100413B : Swift detection of a burst
  22. GRB 100413A: GROND Upper limits
  23. GRB 100413A: Swift/UVOT Upper Limits
  24. Konus-Wind observation of GRB 100413A
  25. GRB 100413A: Faulkes Telescope South observations
  26. Tentative redshift of GRB100413A from X-ray data
  27. GRB 100413A: SARA upper limit
  28. GRB 100413A: Swift-XRT Refined Analysis
  29. GRB 100413A: Swift-BAT initial refined analysis
  30. GRB 100413A: Enhanced Swift-XRT position
  31. GRB 100413: xinglong TNT optical upper limit
  32. GRB 100413A: MASTER-Net optical observations
  33. GRB 100413A: Swift detection of a burst
  34. Swift-BAT trigger 419015 is not astrophysical
  35. Trigger 419015 is probably not a GRB
  36. GRB100401A: GROND Upper Limits
  37. INTEGRAL Alert n. 5995: MASTER-Net optical observations
  38. MASTER observations on the Swift second trigger on LS V +44 17
  39. IBAS Alert n. 5996: not a GRB
  40. IBAS Alert n. 5995: not a GRB
  41. GRB 100331B: GROND Upper limits
  42. Master-Net observations on the Swift trigger on LS V +44 17
  43. GRB 100401A: Swift/UVOT Upper Limit
  44. Swift/BAT trigger 417974 (GRB100401A): Swift/XRT observations
  45. GRB 100401A: Fermi GBM detection
  46. GRB 100401A Burst, possibly short, detected in ground analysis of BAT data
  47. GRB 100331B: BOOTES-3 observations
  48. GRB 100316A: R-band limit
  49. GRB 100324B: Suzaku WAM observation of the prompt emission
  50. GRB 100331B: Swift/UVOT Upper Limits
  51. GRB 100331B: Swift/XRT possible afterglow candidate
  52. Swift detection of LS V +44 17
  53. GRB 100331B: SuperAGILE Localization of a Long GRB
  54. INTEGRAL trigger 5994 (GRB100331A): Swift/XRT observations
  55. INTEGRAL trigger 5994 / GRB 100331A: GROND detection of a variable source
  56. GRB 100331A: BOOTES-3 observations
  57. Konus-Wind observation of GRB 100324B
  58. GRB 100331A: A long GRB detected by INTEGRAL
  59. IPN triangulation of GRB100324B
  60. Konus-Wind observation of GRB 100322A
  61. Fermi GBM detection of four Solar Flares
  62. GRB 100322A: Suzaku WAM observation of the prompt emission
  63. Fermi/GBM and Swift/BAT detection of a burst from SGR 1806-20
  64. GRB 100325A: Fermi LAT detection
  65. GROND observations of GRB100316D/SN2010bh
  66. GRB 100325A: Fermi GBM detection
  67. GRB 100324A: GROND observations
  68. GRB 100324A found in ground analysis of BAT data
  69. Emerging Supernova in the Afterglow of GRB 100316D
  70. GRB 100322B or possible Galactic transient detected in ground analysis of BAT data
  71. GRB 100316D: Spectroscopic Discovery of a Supernova from Magellan
  72. GRB 100322A: Fermi GBM detection
  73. SGR 1833-0832 is pulsed at 7.56 seconds
  74. SGR 1833-0832 is pulsed at 7.56 seconds
  75. GRB 100316D: ATCA radio observations
  76. GRB 100319A: correction to GCN 10527
  77. Probable SGR 1833-0832: Swift-XRT refined analysis
  78. Probable SGR 1833-0832: Enhanced Swift-XRT position
  79. Swift-XRT refined position of the probable new SGR 1833-0832
  80. Swift-BAT refined analysis of the probable new SGR 1833-0832
  81. GRB 100219A: MASTER-Net optical alert observations
  82. GRB 100319A: Swift detection of a burst; possible SGR
  83. GRB 100316D: Possible Supernova
  84. GRB 100316D: Pre-burst emission measured by BAT
  85. GRB 100316D: Further Gemini observations
  86. GRB 100219A: optical upper limit
  87. GRB 100316A: optical observations in CrAO
  88. GRB 100316D: Swift/UVOT Observations
  89. GRB 100316D: Swift XRT enhanced position and further refined analysis
  90. GRB 100316B: Swift-XRT refined analysis
  91. Tentative redshift of GRB100316D from X-ray data
  92. GRB 100316C: GROND Detection of a Optical/NIR Afterglow Candidate
  93. Trigger 416226 is probably not a GRB
  94. GRB 100316D: GROND Detection of the Optical/NIR Afterglow Candidate
  95. GRB 100316D: Gemini/GMOS and VLT/X-shooter observations
  96. GRB 100316D: VLT/X-shooter observations
  97. GRB 100316D: Swift-BAT refined analysis
  98. GRB100316C: Swift/UVOT Upper Limits
  99. GRB 100316C: Swift-BAT refined analysis
  100. GRB 100316B: Swift/UVOT observations

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