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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"

43940 results found.

  1. GRB 170428A: Swift/UVOT Upper Limits
  2. GRB 170428A: Xinglong 2.16-m upper limit and host galaxy candidate
  3. GRB 170428A: Swift-XRT refined Analysis
  4. GRB 170428A: Swift-BAT refined analysis
  5. Konus-Wind observation of GRB 170428A
  6. GRB 170428A: MASTER-OAFA early optical observations
  7. Swift Trigger 750337 is probably a noise fluctuation
  8. GRB 170428A: Swift detection of a short burst
  9. Swift trigger 750096 - OT candidate
  10. GRB170426.95 MASTER-Net OT detection
  11. Swift Trigger 750096 is probably a noise fluctuation
  12. Swift Trigger 750044 is probably a noise fluctuation
  13. GRB 170424A: LCO Observations
  14. Konus-Wind observation of GRB 170424A
  15. GRB 170424A: Tiled Swift observations
  16. GRB 170424A: Fermi GBM detection
  17. GRB 170424A: Fermi-LAT detection
  18. GRB 170419A: LCO Observations
  19. GRB 170423A: Fermi GBM detection
  20. Swift Trigger 748858: AbAO and TSHAO optical observations
  21. Fermi GBM trigger 514436208/170421123 is not a GRB
  22. Swift Trigger 748858: TAROT La Silla observatory optical observations
  23. Swift Trigger 748858: RATIR Optical and NIR Observations
  24. GRB 170419B, Swift-BAT refined analysis
  25. GRB 170419B: Zadko observatory - Gingin optical observations
  26. GRB 170419A: Zadko observatory - Gingin optical observations
  27. Fermi GBM trigger 514379207/170420463 is not a GRB
  28. GRB 170419A: Swift-XRT refined Analysis
  29. GRB 170412A CALET Gamma-Ray Burst Monitor detection
  30. GRB 170419B: Fermi GBM observation
  31. GRB 170419A: Swift-BAT refined analysis
  32. Swift trigger 748858: Swift BAT, XRT, and UVOT refined analysis
  33. GRB 170419B: Swift detection of a burst
  34. GRB 170419A: Enhanced Swift-XRT position
  35. Swift Trigger 748858: MASTER-OAFA early optical observations
  36. GRB 170419A: Swift detection of a burst
  37. Swift Trigger 748858: Zadko observatory - Gingin optical observations
  38. Swift Trigger 748858: a possible GRB
  39. LIGO/Virgo G275404: DLT40 follow-up observation
  40. LIGO/Virgo G277583: DLT40 follow-up observation
  41. GRB 170409A: TAROT Reunion observatory optical observations
  42. Konus-Wind observation of GRB 170409A
  43. GRB 170402A: AstroSat CZTI detection
  44. GRB 170409A: Fermi GBM Observation
  45. GRB 170409A: Fermi-LAT detection
  46. GRB 170405A: SMARTS optical/IR afterglow observations
  47. GRB 170403B CALET Gamma-Ray Burst Monitor detection
  48. GRB 170317A: SAO RAS optical observations
  49. GRB170405A, Swift-UVOT Detection
  50. GRB 170405A, Swift-BAT refined analysis
  51. GRB 170405A: Etelman observatory optical observations
  52. GRB 170405A: Swift-XRT refined Analysis
  53. GRB 170405A: RATIR Optical and NIR Observations
  54. Konus-Wind observation of GRB 170405A
  55. GRB 170405A: LCO FTN observations
  56. Trigger 745966: Swift detection of 4U1850-03
  57. GRB 170405A: ISON/Terskol optical observations
  58. GRB 170405A: Watcher optical detection
  59. GRB 170405A: Redshift from OSIRIS/GTC
  60. GRB 170405A: TAROT Reunion observatory optical observations
  61. GRB 170405A: NOT optical observations
  62. GRB 170405A: Fermi-LAT detection
  63. GRB 170405A: Fermi GBM observation
  64. GRB 170405A: Enhanced Swift-XRT position
  65. GRB 170405A: Swift detection of a burst with an optical counterpart
  66. LIGO/Virgo G275697: Update on significance from offline analyses
  67. LIGO/Virgo G275404: Update on significance from offline analyses
  68. LIGO/Virgo G275404: European VLBI Network (EVN) follow-up of the near-IR transient in the AGL J1914+1043 field
  69. GRB 170402A CALET Gamma-Ray Burst Monitor detection
  70. GRB 170330A CALET Gamma-Ray Burst Monitor detection
  71. GRB 170325A: optical observations, possible OT/host detection
  72. Konus-Wind observation of GRB 170403A (short/hard)
  73. IPN Triangulation of GRB 170403A (short)
  74. GRB 170403A: Fermi GBM observation
  75. Konus-Wind observation of GRB 170330A
  76. IceCube-170321A: Konus-Wind upper limits
  77. Swift Trigger 745090 is a noise trigger near NGC 5195
  78. Fermi-LAT Gamma-ray Observations of IceCube-170321
  79. Swift triggered on SAX J1806.5-221
  80. GRB 170330A: AstroSat CZTI detection
  81. GRB 170330A: Swift-BAT refined analysis
  82. GRB 170331A: Swift-BAT refined analysis
  83. DOAO 1m telescope V, R, I observation of GRB 170317A
  84. GRB 170331A: Swift/UVOT Upper Limits
  85. IceCube-170321A: Swift-XRT observations
  86. GRB 170330A: Swift-XRT refined Analysis
  87. GRB 170331A: Swift-XRT refined Analysis
  88. GRB 170330A: Enhanced Swift-XRT position
  89. GRB 170331A: Enhanced Swift-XRT position
  90. GRB 170330A: Swift/UVOT Detection of a Fading Afterglow
  91. GRB 170325A: 15 GHz upper limits from AMI
  92. GRB 170318B: 15 GHz upper limits from AMI
  93. GRB 170318A: 15 GHz upper limits from AMI
  94. GRB 170317A: 15 GHz upper limits from AMI
  95. GRB 170330A: LCO Cerro Tololo observations
  96. LIGO/Virgo G275697: LOFAR follow-up
  97. Konus-Wind observation of GRB 170329A
  98. GRB 170329A: AstroSat CZTI detection
  99. IBAS trigger 7789 is not a GRB
  100. GRB 170331A: LCO Sutherland observations

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