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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"

27466 results found.

  1. GRB 100413B: Swift Confirmation of Burst
  2. GRB 100414A: Swift-XRT detection of a possible X-ray afterglow
  3. GRB 100413A: Swift-BAT final refined analysis
  4. GRB 100414A: Fermi GBM detection
  5. GRB100414A: Fermi LAT detection
  6. GRB 100413B : Swift detection of a burst
  7. GRB 100413A: GROND Upper limits
  8. GRB 100413A: Swift/UVOT Upper Limits
  9. Konus-Wind observation of GRB 100413A
  10. GRB 100413A: Faulkes Telescope South observations
  11. GRB 100413A: SARA upper limit
  12. GRB 100413A: Swift-XRT Refined Analysis
  13. GRB 100413A: Swift-BAT initial refined analysis
  14. GRB 100413A: MASTER-Net optical observations
  15. GRB 100413A: Swift detection of a burst
  16. Swift-BAT trigger 419015 is not astrophysical
  17. Trigger 419015 is probably not a GRB
  18. INTEGRAL Alert n. 5995: MASTER-Net optical observations
  19. MASTER observations on the Swift second trigger on LS V +44 17
  20. IBAS Alert n. 5996: not a GRB
  21. IBAS Alert n. 5995: not a GRB
  22. GRB 100331B: GROND Upper limits
  23. Master-Net observations on the Swift trigger on LS V +44 17
  24. GRB 100401A: Swift/UVOT Upper Limit
  25. Swift/BAT trigger 417974 (GRB100401A): Swift/XRT observations
  26. GRB 100401A: Fermi GBM detection
  27. GRB 100401A Burst, possibly short, detected in ground analysis of BAT data
  28. GRB 100316A: R-band limit
  29. GRB 100331B: Swift/XRT possible afterglow candidate
  30. Swift detection of LS V +44 17
  31. INTEGRAL trigger 5994 (GRB100331A): Swift/XRT observations
  32. INTEGRAL trigger 5994 / GRB 100331A: GROND detection of a variable source
  33. Konus-Wind observation of GRB 100322A
  34. Fermi GBM detection of four Solar Flares
  35. GRB 100322A: Suzaku WAM observation of the prompt emission
  36. Fermi/GBM and Swift/BAT detection of a burst from SGR 1806-20
  37. GRB 100325A: Fermi LAT detection
  38. GROND observations of GRB100316D/SN2010bh
  39. GRB 100325A: Fermi GBM detection
  40. GRB 100324A: GROND observations
  41. GRB 100324A found in ground analysis of BAT data
  42. GRB 100322B or possible Galactic transient detected in ground analysis of BAT data
  43. GRB 100316D: Spectroscopic Discovery of a Supernova from Magellan
  44. SGR 1833-0832: Swift/UVOT Upper Limits
  45. GRB 100322A: Fermi GBM detection
  46. Probable SGR 1833-0832: Swift-XRT refined analysis
  47. Swift-XRT refined position of the probable new SGR 1833-0832
  48. Swift-BAT refined analysis of the probable new SGR 1833-0832
  49. GRB 100219A: MASTER-Net optical alert observations
  50. GRB 100319A: Swift detection of a burst; possible SGR
  51. GRB 100316D: Pre-burst emission measured by BAT
  52. GRB 100316D: Swift/UVOT Observations
  53. GRB 100316D: Swift XRT enhanced position and further refined analysis
  54. GRB 100316B: Swift-XRT refined analysis
  55. GRB 100316C: GROND Detection of a Optical/NIR Afterglow Candidate
  56. Trigger 416226 is probably not a GRB
  57. GRB 100316D: GROND Detection of the Optical/NIR Afterglow Candidate
  58. GRB 100316D: Swift-BAT refined analysis
  59. GRB100316C: Swift/UVOT Upper Limits
  60. GRB 100316C: Swift-BAT refined analysis
  61. GRB 100316B: Swift/UVOT observations
  62. GRB 100316C: Swift-XRT team refined analysis
  63. GRB 100316D: Swift XRT refined analysis
  64. GRB 100316A: TAROT Calern observatory optical observations
  65. GRB 100316A: Swift-XRT refined analysis
  66. GRB 100316A: Swift-BAT refined analysis
  67. GRB 100316B: Swift-BAT refined analysis
  68. GRB100316A: Swift/UVOT Upper Limits
  69. Trigger 416140 is almost certainly not a GRB
  70. GRB 100316D: Swift detection of a burst
  71. GRB 100316B: Skynet/PROMPT Observations of Fading
  72. GRB 100316B: GROND Detection of the Optical/NIR Afterglow Candidate
  73. GRB 100316C: Swift detection of a burst
  74. GRB 100316B: Swift detection of a burst with optical counterpart
  75. GRB 100316 optical candidate from 1.23m CAHA telescope
  76. GRB 100316 optical candidate from 1.23m CAHA telescope
  77. GRB 100316A: Swift/UVOT Observations
  78. GRB 100316A: Swift-XRT detection
  79. GRB 100316A: Swift detection of a burst
  80. IBAS Alert 5992 is not a GRB, but XTE J1855-026
  81. GRB 100305A: Super-LOTIS early observations
  82. GRB 100305A, Swift-BAT refined analysis
  83. GRB 100305A: Swift/UVOT Upper Limits
  84. GRB 100305A: Swift-XRT refined analysis
  85. GRB 100305A Optical Observations
  86. GRB 100305A: PAIRITEL NIR Upper Limits
  87. GRB 100305A: Swift detection of a burst
  88. GRB 100302A: Ondrejov 65cm limit
  89. GRB 100302A: Swift/UVOT Upper Limits
  90. GRB 100302A: Swift-XRT refined analysis
  91. GRB 100302A: Optical observations at Crni Vrh
  92. GRB 100302A: MASTER-Net optical alert observations
  93. GRB 100302A, Swift-BAT refined analysis
  94. GRB 100302A: Skynet/DAO Observations
  95. GRB 100302A: Swift detection of a burst
  96. GRB 100224B: Fermi GBM detection
  97. GRB 100219A: GAO 150cm telescope Optical Observation
  98. GRB 100224A SHB found in ground analysis of BAT data
  99. GRB 100225A: Fermi LAT detection
  100. GRB 100225A: Fermi GBM detection

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