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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"

23613 results found.

  1. GRB 100418A: Swift detection of a burst with a possible optical afterglow
  2. GRB 100414A: Suzaku WAM observation of the prompt emission
  3. GRB 100414A: GROND Detection of the Optical Afterglow
  4. GRB 100414A: Gemini-N candidate and redshift
  5. GRB 100413A: Suzaku WAM observation of the prompt emission
  6. GRB 100413B: Swift Confirmation of Burst
  7. GRB 100413A: Swift-BAT final refined analysis
  8. GRB 100414A: IPN Localization
  9. Konus-Wind observation of GRB 100414B
  10. GRB 100415A: MAXI/GSC detection of a probable GRB
  11. GRB 100414A: Fermi GBM detection
  12. GRB 100413B : Swift detection of a burst
  13. GRB 100413A: GROND Upper limits
  14. Konus-Wind observation of GRB 100413A
  15. GRB 100413A: Faulkes Telescope South observations
  16. GRB 100413A: Swift-BAT initial refined analysis
  17. GRB 100413A: MASTER-Net optical observations
  18. GRB 100413A: Swift detection of a burst
  19. Spin down rate and inferred dipole magnetic field of the new soft gamma-ray repeater SGR 1833-0832
  20. Trigger 419015 is probably not a GRB
  21. GRB100401A: GROND Upper Limits
  22. INTEGRAL Alert n. 5995: MASTER-Net optical observations
  23. MASTER observations on the Swift second trigger on LS V +44 17
  24. GRB 100331B: GROND Upper limits
  25. Master-Net observations on the Swift trigger on LS V +44 17
  26. GRB 100331B: BOOTES-3 observations
  27. GRB 100316A: R-band limit
  28. GRB 100324B: Suzaku WAM observation of the prompt emission
  29. GRB 100331B: Swift/UVOT Upper Limits
  30. Swift detection of LS V +44 17
  31. GRB 100331B: SuperAGILE Localization of a Long GRB
  32. INTEGRAL trigger 5994 (GRB100331A): Swift/XRT observations
  33. INTEGRAL trigger 5994 / GRB 100331A: GROND detection of a variable source
  34. GRB 100331A: BOOTES-3 observations
  35. Konus-Wind observation of GRB 100324B
  36. GRB 100331A: A long GRB detected by INTEGRAL
  37. IPN triangulation of GRB100324B
  38. Konus-Wind observation of GRB 100322A
  39. Short X-ray Transient detected by MAXI/GSC
  40. GRB 100322A: Suzaku WAM observation of the prompt emission
  41. GROND observations of GRB100316D/SN2010bh
  42. GRB 100324A: GROND observations
  43. GRB 100324A found in ground analysis of BAT data
  44. Emerging Supernova in the Afterglow of GRB 100316D
  45. GRB 100322B or possible Galactic transient detected in ground analysis of BAT data
  46. GRB 100316D: Spectroscopic Discovery of a Supernova from Magellan
  47. SGR 1833-0832 is pulsed at 7.56 seconds
  48. SGR 1833-0832 is pulsed at 7.56 seconds
  49. Swift-BAT refined analysis of the probable new SGR 1833-0832
  50. GRB 100219A: MASTER-Net optical alert observations
  51. GRB 100319A: Swift detection of a burst; possible SGR
  52. GRB 100316D: Pre-burst emission measured by BAT
  53. GRB 100316D: Swift/UVOT Observations
  54. GRB 100316D: Swift XRT enhanced position and further refined analysis
  55. GRB 100316B: Swift-XRT refined analysis
  56. GRB 100316C: GROND Detection of a Optical/NIR Afterglow Candidate
  57. Trigger 416226 is probably not a GRB
  58. GRB 100316D: GROND Detection of the Optical/NIR Afterglow Candidate
  59. GRB 100316D: Swift-BAT refined analysis
  60. GRB100316C: Swift/UVOT Upper Limits
  61. GRB 100316C: Swift-BAT refined analysis
  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-BAT refined analysis
  66. GRB 100316B: Swift-BAT refined analysis
  67. Trigger 416140 is almost certainly not a GRB
  68. GRB 100316C: BOOTES-3 observations
  69. GRB 100316D: Swift detection of a burst
  70. GRB 100316B: Skynet/PROMPT Observations of Fading
  71. GRB 100316B: GROND Detection of the Optical/NIR Afterglow Candidate
  72. XRF 100315A: MAXI/GSC detection of a short X-ray transient
  73. GRB 100316C: Swift detection of a burst
  74. GRB 100316B: Swift detection of a burst with optical counterpart
  75. GRB 100316A: Swift/UVOT Observations
  76. GRB 100316A: Swift detection of a burst
  77. IBAS Alert 5992 is not a GRB, but XTE J1855-026
  78. GRB100305A: Optical upper limits at IAO
  79. GRB100302A : LOAO observations and Lulin afterglow analysis
  80. GRB 100305A, Swift-BAT refined analysis
  81. GRB 100305A: Swift/UVOT Upper Limits
  82. GRB 100305A: Enhanced Swift-XRT position
  83. GRB 100305A: Swift detection of a burst
  84. GRB 100302A: Swift/UVOT Upper Limits
  85. GRB 100302A: Swift-XRT refined analysis
  86. GRB 100302A: MASTER-Net optical alert observations
  87. GRB 100302A, Swift-BAT refined analysis
  88. GRB 1000302A : A possible afterglow candidate
  89. GRB 100302A: Skynet/DAO Observations
  90. GRB 100302A: Swift detection of a burst
  91. GRB 100224B: Fermi GBM detection
  92. GRB 100206A: optical observations in CrAO
  93. GRB 100224A SHB found in ground analysis of BAT data
  94. GRB 100225A: Fermi GBM detection
  95. GRB 100223A: Fermi GBM detection
  96. GRB 100219A - Gemini South Spectroscopy
  97. GRB 100216A: Swift/UVOT Observations
  98. GRB100219A Akeno and Okayama MITSuME Optical Observation
  99. GRB 100219A: GROND observations
  100. GRB 100219A: Swift-BAT refined analysis

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