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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.

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

43945 results found.

  1. GRB 170626A: Swift detection of a burst
  2. LIGO/Virgo G288732: Fermi GBM Upper Limits for the LIGO Trigger and LAT Candidate
  3. LIGO/Virgo G288732: Pan-STARRS coverage of the Fermi/LAT candidate position
  4. Swift trigger 758168 is probably not an astrophysical source
  5. Swift Trigger 758005 is Probably Not an Astrophysical Source
  6. GRB 170607A CALET Gamma-Ray Burst Monitor detection
  7. Konus-Wind observation of GRB 170616A
  8. IPN Triangulation of GRB 170616A (short/hard)
  9. GRB 170614A: AstroSat CZTI detection
  10. GRB 170614A CALET Gamma-Ray Burst Monitor detection
  11. GRB 170606A CALET Gamma-Ray Burst Monitor detection
  12. LIGO/Virgo G288732: VLA imaging of the possible Fermi/LAT counterpart
  13. Swift Trigger 756953 is probably not an astrophysical source
  14. GRB170612.87 MASTER-Net OT detection
  15. LIGO/Virgo G288732: Kiso/KWFC optical imaging of the possible Fermi/LAT counterpart
  16. LIGO/Virgo G288732: HAWC follow-up
  17. Konus-Wind observation of GRB 170604A
  18. Konus-Wind observation of GRB 170607B
  19. LIGO/Virgo G288732: UKIRT near-IR imaging of the Fermi/LAT candidate
  20. LIGO/Virgo G288732: LBT optical imaging of the Fermi/LAT candidate
  21. GRB 170610A: MAXI/GSC detection
  22. IPN Triangulation of GRB 170607B
  23. LIGO/Virgo G288732 : MAXI/GSC observations
  24. GRB 170607A: Redshift from GTC/OSIRIS
  25. LIGO/Virgo G288732: Updated sky map from gravitational-wave data
  26. GRB 170607B: Fermi GBM detection
  27. GRB 170607A: ISON/Terskol optical observations
  28. LIGO/Virgo G288732: GWFUNC/NOWT observations of the skymap and follow-up of the Fermi/LAT candidate
  29. LIGO/Virgo G288732: Swift/UVOT follow up of the possible LAT counterpart
  30. LIGO/Virgo G288732: Swift/BAT data search
  31. LIGO/Virgo G288732: Swift-XRT follow up of the putative LAT counterpart
  32. GRB 170607B: AstroSat CZTI detection
  33. LIGO/Virgo G288732: INTEGRAL search for a prompt gamma-ray counterpart
  34. GRB 170607A: Swift-BAT refined analysis
  35. LIGO/Virgo G288732:SVOM/Mini-GWAC observations of the initial skymap
  36. LIGO/Virgo G288732: AGILE GRID Observations
  37. LIGO/Virgo G288732: Fermi-LAT detection of a weak candidate
  38. LIGO/Virgo G288732: IceCube neutrino observations update
  39. GRB 170607A: Correction on the possible host galaxy identification
  40. LIGO/Virgo G288732: AGILE MCAL Observations
  41. LIGO/Virgo G288732 ANTARES search
  42. LIGO/VIRGO G288732: Fermi GBM Observations
  43. LIGO/Virgo G288732: Identification of a GW Binary Merger Candidate
  44. GRB 170607A: Swift/UVOT Detection
  45. GRB 170607A: MASTER-Tavrida early OT observations
  46. GRB 170607A: Fermi GBM observation
  47. GRB 170607A: NOT optical afterglow detection
  48. GRB 170607A: Swift-XRT refined Analysis
  49. GRB 170607A: Enhanced Swift-XRT position
  50. GRB 170607A: Swift detection of a burst with a bright optical counterpart
  51. GRB 170526A: 15 GHz upper limits from AMI
  52. GRB 170524A: 15 GHz upper limits from AMI
  53. GRB 170519A: 15 GHz upper limits from AMI
  54. GRB 170531B: Zeiss-1000/CrAO optical observations
  55. GRB 170531B: WHT spectroscopy
  56. GRB 170519A: TShAO and AbAO optical observations
  57. GRB 170604A: Swift/UVOT Observations
  58. GRB 170519A: Mondy optical observations
  59. GRB 170529A: AstroSat CZTI detection
  60. GRB 170604A: RATIR Optical and NIR Observations
  61. GRB 170604A: AbAO optical observations
  62. Swift trigger 755873: Swift BAT and XRT refined analysis
  63. GRB 170522A: confirmation of the X-ray afterglow
  64. GROND observations of GRB170604A
  65. Swift Trigger 755873: MASTER Net optical observations
  66. GRB 170604A: Swift-XRT refined Analysis
  67. GRB 170604A: GTC spectroscopic redshift
  68. GRB 170604A: Enhanced Swift-XRT position
  69. GRB 170604A: Swift-BAT refined analysis
  70. Swift Trigger 755873: a possible GRB
  71. GRB 170604A: optical observations
  72. GRB 170604A: Swift detection of a burst
  73. Trigger 755848: Swift spurious trigger on Cen X-3
  74. GRB 170531B: ISON/Terskol optical observations
  75. GRB 170531B: Swift/UVOT Detection
  76. GRB 170531B: Swift-BAT refined analysis
  77. GRB 170531A: Swift/UVOT Upper Limits
  78. GRB 170531B: LCO observations
  79. GRB 170531B: Swift-XRT refined Analysis
  80. GRB 170531A: MASTER Net job
  81. GRB 170531A: Swift-XRT refined Analysis
  82. GRB 170531B: MASTER Net optical counterpart refind position and magnitude
  83. GROND observations of GRB 170531B
  84. GRB 170531B: Redshift from GTC/OSIRIS
  85. GRB 170531A: ePESSTO NTT observations
  86. GRB 170531B: Enhanced Swift-XRT position
  87. GRB 170531B: CrAO confirmation of the afterglow
  88. GRB 170531B: MASTER Net OT detection
  89. GRB 170531A: Swift/UVOT Observations
  90. GRB 170531B: Swift detection of a burst
  91. GRB 170531A: Swift detection of a burst
  92. GRB 170519A: CrAO optical observations
  93. GRB 170524B: Swift-UVOT/XRT Confirmation of Afterglow
  94. Konus-Wind observation of GRB 170529A
  95. Konus-Wind observation of GRB 170527A
  96. IPN Triangulation of GRB 170529A (long)
  97. IPN Triangulation of GRB 170527A
  98. GRB 170511A: AstroSat CZTI detection
  99. GRB 170519A: ISON/Multa optical observations
  100. GRB 170511A: Fermi GBM observation

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