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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').
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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.

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subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

43941 results found.

  1. GRB 170526A, Swift-BAT refined analysis
  2. GRB 170526A: Swift-XRT refined Analysis
  3. LIGO/Virgo G268556: VERITAS Very-High-Energy Gamma-Ray Observations
  4. GRB 170524A: RATIR Optical and NIR Observations
  5. GRB 170526A: Enhanced Swift-XRT position
  6. GRB 170524B: Swift-XRT observations
  7. GRB 170526A: Swift detection of a burst
  8. Konus-Wind observation of GRB 170524B
  9. GRB 170524B: MASTER-OAFA observations
  10. GRB 170511A CALET Gamma-Ray Burst Monitor detection
  11. GRB 170524A: TSHAO and CrAO optical observations
  12. GRB 170524B: Swift ToO observations
  13. GRB 170524A: Swift-BAT refined analysis
  14. GRB 170524B: Swift detection of a burst
  15. GRB 170524A: D50 optical observation and limit
  16. GRB 170524A: Swift-XRT refined Analysis
  17. IPN Triangulation of GRB 170522A
  18. GRB 170511A: MAXI/GSC detection
  19. GRB 170524A: Enhanced Swift-XRT position
  20. GRB 170524A: Swift detection of a burst (or possible new SGR)
  21. GRB 170522A: LCO McDonald observations
  22. GRB 170522A: Swift-XRT observations
  23. GRB 170522A: Global MASTER-Net job
  24. Konus-Wind observation of GRB 170522B
  25. IPN Triangulation of GRB 170522B (long/intense)
  26. Konus-Wind observation of GRB 170522A
  27. GRB 170522A: Tiled Swift observations
  28. GRB 170522A: Fermi-LAT detection
  29. GRB 170522A: Fermi GBM detection
  30. GRB 170514A CALET Gamma-Ray Burst Monitor detection
  31. GRB 170519A: Watcher optical observations
  32. GRB 170519A: Continued RATIR Optical and NIR Observations
  33. GRB 170519A: NOT optical observations
  34. GRB 170519A: Redshift from GTC/OSIRIS
  35. GRB170519A, Swift-UVOT Detection
  36. GRB 170519A: BOOTES-5/JGT early optical detection
  37. LIGO/Virgo G284239: DLT40 follow-up observation
  38. GRB 170519A: KAIT Optical Observations
  39. GRB 170519A: Swift-XRT refined Analysis
  40. GRB 170519A: iTelescope T11 optical observations
  41. GRB 170519A: Swift-BAT refined analysis
  42. GRB 170510A: LCO Siding Springs early observations
  43. GRB 170519A: RATIR Optical and NIR Observations
  44. GRB 170519A: optical observations
  45. GRB 170519A: Enhanced Swift-XRT position
  46. GRB 170519A: Swift detection of a burst with an optical counterpart
  47. GRB 170510A CALET Gamma-Ray Burst Monitor detection
  48. LIGO/Virgo G277583: UH88/SNIFS classification of ATLAS and PS1 transients
  49. GRB 170510A: Swift-XRT afterglow detection
  50. GRB 170516A: Swift-BAT refined analysis
  51. GRB 170516A: Swift-XRT refined Analysis
  52. AXP CXOU J164710.2-455216: Fermi GBM observation
  53. GRB 170516A: Swift/UVOT Upper Limits
  54. GRB 170516A: Enhanced Swift-XRT position
  55. GRB 170516A: Swift detection of a burst
  56. Swift Trigger AXP CXOU J164710.2-455216: MASTER-OAFA observations
  57. Swift Trigger on AXP CXOU J164710.2-455216
  58. GRB 170514A: Fermi GBM detection
  59. GRB 170510A: AstroSat CZTI(Veto) detection
  60. Fermi GBM trigger 516459580/170514541 is not a GRB
  61. GRB 170510A: Global MASTER Net possible OT observations
  62. Konus-Wind observation of GRB 170510A
  63. LIGO/Virgo G275404 and G275659: SkyMapper Follow-up Observations
  64. LIGO/Virgo G284239: Konus-Wind observations
  65. GRB 170510A: LCO possible counterpart
  66. GRB 170510A: Swift-XRT observations
  67. GRB 170510A: Fermi GBM observation
  68. LIGO/Virgo G284239: H.E.S.S. very-high energy gamma-ray follow-up
  69. LIGO/Virgo G284239: MAXI/GSC observations
  70. GRB 170510A: Tiled Swift observations
  71. GRB 170510A: Fermi-LAT detection
  72. Swift Trigger 752193 is not a GRB
  73. LIGO/Virgo G284239: AstroSat CZTI upper limits
  74. Trigger 751928: Swift misidentification of Cen X-3
  75. GRB 170423A: TAROT Reunion observatory optical observations
  76. IceCube-170506A - IceCube update on a high-energy neutrino candidate event
  77. Swift XRT observations of GRB 170424A
  78. LIGO/Virgo G284239:SVOM/Mini-GWAC observations of the initial skymap
  79. LIGO/VIRGO G284239: Fermi GBM Upper Limits
  80. LIGO/Virgo G284239: HAWC follow-up
  81. LIGO/Virgo G284239: MASTER automatic follow up and synchronous observations
  82. LIGO/Virgo G284239: Fermi-LAT search for a high-energy gamma-ray counterpart
  83. LIGO/Virgo G284239: TZAC TAROT network observations with TRE/TCA/TCH
  84. GRB 170428A CALET Gamma-Ray Burst Monitor detection
  85. LIGO/Virgo: G284239 ANTARES search
  86. LIGO/Virgo G284239: Swift/BAT data search
  87. LIGO/Virgo G284239: AGILE GRID observations
  88. LIGO/Virgo G284239: INTEGRAL search for a prompt gamma-ray counterpart
  89. LIGO/Virgo G284239: AGILE MCAL Observations
  90. LIGO/Virgo G284239: IceCube neutrino observations
  91. LIGO/Virgo G284239: Identification of a GW Burst Candidate
  92. GRB 170428A: GTC spectroscopic redshift of candidate host galaxy
  93. GRB 170428A: 15 GHz upper limits from AMI
  94. Swift Trigger 748858: 15 GHz upper limits from AMI
  95. LIGO/Virgo G268556: Refined localization from CBC parameter estimation
  96. GRB 170428A: TNG optical observations
  97. Short GRB 170428A: MASTER-OAFA final reduction of the optical observations
  98. GRB 170428A: DCT Imaging
  99. GRB 170428A: TAROT La Silla observatory optical observations
  100. GRB 170428A: RATIR Afterglow Confirmation

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