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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"

11621 results found.

  1. GRB 181126B: KAIT Follow-Up Observations of a Fermi Short GRB (Trigger 564897175)
  2. MASTER OT J063515.49-624002.9 of Fermi trigger 565936249: optical observations in SAAO
  3. MASTER: OTs detection during Fermi alert trigger 565936249 early observations
  4. GRB 181126B: Zwicky Transient Facility Follow-Up of a Fermi Short GRB (Trigger 564897175)
  5. Fermi-GBM Observations During Four New GW-Detected BBH Mergers (Correction)
  6. Fermi-GBM Observations During Four New GW-Detected BBH Mergers
  7. GRB 181201A: Insight-HXMT/HE detection
  8. GRB 181201A: Fermi-LAT detection
  9. Short-duration GRB 181121.4: MASTER-Tavrida possible OT detection near the PGC galaxy during large Fermi error box inspection
  10. GRB 181126A: Fermi GBM observation
  11. GRB 181125A: Fermi GBM observation
  12. GRB 181020A: AstroSat CZTI detection
  13. GRB 181119A: Insight-HXMT/HE detection
  14. GRB 181120A: Fermi GBM observation
  15. GRB 181120A: Fermi-LAT detection
  16. Fermi GRB 181105.31: Global MASTER Net optical observations
  17. GRB 181028A: Insight-HXMT/HE detection
  18. GRB 181028A: CALET Gamma-Ray Burst Monitor detection
  19. GRB 181026A: AstroSat CZTI detection
  20. Konus-Wind observation of GRB 181028A
  21. IPN Triangulation of GRB 181028A (long)
  22. GRB 181028A: Fermi GBM observation
  23. GRB 181028A: Fermi-LAT detection
  24. GRB 181027A: Fermi GBM detection
  25. GRB 180728B: Zwicky Transient Facility Follow-Up of a Fermi Short GRB (Trigger 554505003)
  26. Fermi-LAT Gamma-ray Observations of IceCube-181023A
  27. IceCube-181023A - IceCube observation of a high-energy neutrino candidate event
  28. Konus-Wind observation of GRB 181020A
  29. GRB 181020A: Swift/UVOT Detection
  30. GRB 181020A: Global MASTER Net OT observations
  31. GRB 181020A: VLT/X-shooter spectroscopy and redshift
  32. GRB 181020A: Fermi GBM detection
  33. GRB 181020A: Fermi-LAT detection
  34. GRB 181014A: Insight-HXMT/HE detection
  35. Fermi GBM Observation of IceCube-181014A
  36. Fermi-LAT Gamma-ray Observations of IceCube-181014A
  37. GRB180913A: Zwicky Transient Facility Follow-Up of a Fermi Short GRB (Trigger 558557292)
  38. GRB 181010A: Fermi GBM observation
  39. IPN Triangulation of GRB 181008B (long)
  40. GRB 181008A: Insight-HXMT/HE detection
  41. INTEGRAL detections of the prompt gamma-ray emission of GRB 180914B
  42. Konus-Wind observation of GRB 180923A
  43. GRB 180923B - GBM Correction to GCN 23263
  44. GRB 180923B: Fermi GBM detection
  45. GRB 180914B: OSN Detection and light curve/SED analysis
  46. Konus-Wind observation of GRB 180914A
  47. GRB 180914B: DDOTI/OAN Detection and Confirmation of Fading
  48. GRB 180914B: AstroSat CZTI detection
  49. GRB 180914A: AstroSat CZTI detection
  50. IPN Triangulation of GRB 180914A (long)
  51. GRB 180914B: VLT/X-shooter spectroscopic redshift
  52. GRB 180914B: AGILE/MCAL refined analysis
  53. GRB180914B: Swift UVOT detection of an optical afterglow
  54. Konus-Wind of the very bright GRB 180914B
  55. GRB 180914B: RATIR Optical and NIR Observations
  56. GRB 180914B: Swift-XRT afterglow detection
  57. GRB 180914A: RATIR Optical and NIR Observations
  58. GRB 180914B: Tiled Swift observations
  59. GRB 180914B: Fermi-LAT detection
  60. GRB 180914A: MASTER automatic inspection
  61. GRB 180914A: Swift-XRT observations
  62. GRB 180914A: Tiled Swift observations
  63. GRB 180914A: Fermi GBM detection
  64. GRB 180914A: Fermi-LAT detection
  65. Fermi-LAT Gamma-ray Observations of IceCube-180908A
  66. Fermi GBM trigger 557852757/180905629 is not a GRB
  67. Konus-Wind observation of GRB 180828A
  68. GRB 180828A: AstroSat CZTI detection
  69. GRB 180828A: Fermi GBM observation
  70. Fermi GBM trigger 557014342/180826925 is not a GRB
  71. Fermi GBM trigger 557008382/180826856 is not a GRB
  72. GRB 180818B: 1.5m OSN optical afterglow candidate
  73. GRB180806A: confirmation of the X-ray afterglow
  74. GRB 180818B: Fermi GBM observations
  75. GRB 180812A: Fermi GBM detection
  76. Konus-Wind observation of GRB 180809B
  77. MASTER: OT detection during two Fermi GBM triggers (555263883 and 555263883) error boxes inspection in 22.5 mag SDSS galaxy direction
  78. GRB 180806A: AstroSat CZTI detection
  79. Konus-Wind observation of GRB 180806A
  80. GRB 180809A: Fermi GBM observation
  81. GRB 180809A: CALET Gamma-Ray Burst Monitor detection
  82. GRB 180728A: AstroSat CZTI detection
  83. GRB180806A: correction to Circular 23097
  84. GRB 180723A: AstroSat CZTI detection
  85. GRB 180806A: NOT optical observations
  86. GRB 180806A: Swift-XRT afterglow detection
  87. GRB 180806A/180806.98: RATIR Optical Observations of MASTER OT J004613.05+242014.1
  88. GRB 180806A: Fermi GBM detection
  89. GRB 180806A/180806.94: Refined COATLI Photometry of MASTER OT J004613.05+242014.1
  90. GRB 180806A: Swift ToO observations
  91. GRB 180806.94: COATLI Detection of MASTER OT J004613.05+242014.1 and Confirmation of Fading
  92. GRB 180806.94: MASTER possible OT detection in Fermi GMB trigger 555287944 error box
  93. GRB 180805B: Fermi GBM detection
  94. Fermi Trigger 554765006: MASTER optical inspection
  95. Fermi GBM trigger 554730582/180731493 is not a GRB
  96. Konus-Wind observation of the bright nearby GRB 180728A
  97. GRB 180703B: CALET CAL gamma-ray analysis
  98. GRB 180728B: Fermi GBM detection
  99. IPN Triangulation of GRB 180728B (short)
  100. GRB 180728A: Fermi GBM observation

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