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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"

12190 results found.

  1. Fermi trigger No 612988790: Global MASTER-Net observations report
  2. Fermi GRB 200604A: Global MASTER-Net observations report
  3. GRB 200604A: Fermi GBM Final Real-time Localization
  4. Swift detection of an SGR-like burst from 1RXS J1708−4009
  5. Konus-Wind observation of GRB200528A
  6. Fermi-LAT Gamma-ray Observations of IceCube-200530A
  7. IceCube-200530A: No significant detection in HAWC
  8. Konus-Wind observation of GRB 200524A
  9. IceCube-200530A - IceCube observation of a high-energy neutrino candidate event
  10. GRB 200529A: BOOTES-2/TELMA early optical upper limit
  11. GRB 200528A: Swift-XRT refined Analysis
  12. GRB 200524A: Assy continued optical observations
  13. GRB 200528A: Assy optical upper limit
  14. Swift GRB200529.04: Global MASTER-Net observations report
  15. GRB 200524A: Assy optical observations
  16. GRB 200524A: CrAO optical observations
  17. Fermi-LAT Gamma-ray Observations of IceCube-190523A
  18. Fermi GRB 200524A: Global MASTER-Net observations report
  19. GRB 200524A: Fermi-LAT detection
  20. Konus-Wind detection of short/hard GRB 200521A
  21. IPN triangulation of GRB 200521A (short)
  22. GRB 200522A: LCO Optical Afterglow Detection
  23. IceCube-200523A - IceCube observation of a high-energy neutrino candidate event
  24. GRB 200522A: Swift-XRT refined Analysis
  25. GRB 200521A: AGILE/MCAL and ratemeters detection
  26. GRB 200519A: CALET Gamma-Ray Burst Monitor detection
  27. GRB 200519A: R-band follow-up from HCT
  28. GRB 200519A: Insight-HXMT/HE detection
  29. GRB 200519A: Swift/UVOT Detection
  30. Fermi trigger No 611676654: Global MASTER-Net observations report
  31. GRB 200519A: GROWTH-India optical follow-up
  32. GRB 200519A: AstroSat CZTI detection
  33. Swift GRB 200519A: Global MASTER-Net observations report
  34. Fermi trigger No 611605955: Global MASTER-Net observations report
  35. GRB 200519A: BOOTES-3/YA optical counterpart observations
  36. GRB 200519A: Swift detection of a burst with an optical afterglow
  37. Fermi trigger No 611434353: Global MASTER-Net observations report
  38. GRB 200517A: MAXI/GSC detection
  39. Swift J1818.0-1607: BOOTES-3/YA optical upper limit
  40. Swift GRB200516.63: Global MASTER-Net observations report
  41. Swift Detection of a burst from SGR Swift J1818.0-1607
  42. GRB 200514A: MITSuME Akeno optical upper limits
  43. GRB 200514B: GROWTH-India follow-up of ZTF20aazpphd (AT2020jww)
  44. GRB 200514A: MAXI/GSC detection
  45. Baksan Neutrino Observatory Alert 200512.: Global MASTER-Net observations report
  46. Fermi GBM Sub-Threshold Detection of GRB 200512A
  47. GRB 200512A: Swift-XRT refined Analysis
  48. AGILE detection of a burst from SGR 1935+2154 on May 10, 2020
  49. GRB 200512A: Swift detection of a burst
  50. Fermi-LAT Gamma-ray Observations of IceCube-200512A
  51. SGR 1935+2154: AstroSat CZTI detection
  52. IceCube-200512A: IceCube observation of a high-energy neutrino candidate event
  53. Insight-HXMT's continued observation plan for SGR J1935+2154
  54. Baksan Neutrino Observatory Alert 200511.76: Global MASTER-Net observations report
  55. Konus-Wind observation of SGR 1935+2154 activity on 2020 May 10
  56. IPN triangulation of a bright burst from SGR 1935+2154 on 2020-05-10 at 06:12 UT
  57. GRB 200509A: Swift detection of a burst with a possible optical counterpart
  58. FRB/X-ray bursts from SGR 1935+2154: No Neutrino Counterpart in ANTARES data
  59. GRB 200506A: AstroSat CZTI detection
  60. Swift Detection of a burst from SGR Swift J1818.0-1607
  61. Swift GRB200506.73: Global MASTER-Net observations report
  62. GRB 200505A: AGILE detection
  63. Insight-HXMT detection of a short bright burst from SGR 1935+2154
  64. AGILE detection of a short and hard X-ray burst possibly related to SGR 1935+2154
  65. GRB 200503A: AGILE observations
  66. GRB 200502A: AGILE observations
  67. Geocentric time correction for Insight-HXMT detection of the x-ray counterpart of the FRB by CHIME and STARE2 from SGR 1935+2154
  68. Insight-HXMT X-ray and hard X-ray upper limits to the radio burst detected by FAST from SGR 1935+2154
  69. No optical bursts detected from SGR J1935+2154 by 24 fps observations with Tomo-e Gozen
  70. Insight-HXMT X-ray and hard X-ray detection of the double peaks of the Fast Radio Burst from SGR 1935+2154
  71. Fermi GBM observation of a flare from the magnetar SGR 1806-20
  72. Trigger 968731: Swift detection of SGR1806-20
  73. Fermi GBM trigger 200429866/609886052 is not a GRB
  74. SGR 1935+2154: MASTER optical observations
  75. Konus-Wind observation of hard X-ray counterpart of the radio burst from SGR 1935+2154
  76. SGR 1935+2154: INTEGRAL hard X-ray counterpart of radio burst
  77. Konus-Wind observation of a very intense bursting activity of SGR 1935+2154
  78. A Forest of Bursts from SGR 1935+2154
  79. SGR 1935+2154: AstroSat CZTI detections
  80. high bursting activity of SGR 1935+2154: CGBM observations
  81. SGR 1935+2154 the Insight-HXMT observation plan
  82. SGR 1935+2154: MAXI/GSC detection
  83. Fermi GBM observation of a bright flare from magnetar SGR 1935+2154
  84. Swift detection of multiple bursts from SGR 1935+2154
  85. Fermi-LAT Gamma-ray Observations of IceCube-200425A
  86. IceCube Alert 200425.98: Global MASTER-Net observations report
  87. GRB 200424A: Swift-XRT observations
  88. Konus-Wind observation of GRB 200422A
  89. GRB 200424A: a long GRB detected by INTEGRAL
  90. Konus-Wind observation of a bright burst from SGR 1935+2154
  91. GRB 200415A (possible magnetar Giant Flare in Sculptor Galaxy): INTEGRAL observations
  92. IPN triangulation of GRB 200422A (long/very bright)
  93. IPN Triangulation of a bright burst from SGR 1935+2154
  94. IceCube-200421A: Upper limits from a search for additional neutrino events in IceCube
  95. bright SGR burst detected by CALET Gamma-Ray Burst Monitor
  96. Fermi-LAT Gamma-ray Observations of IceCube-200421A
  97. Fermi GRB 200421A: Global MASTER-Net observations report
  98. IceCube-200421A: No significant detection in HAWC
  99. GRB 200421A: Fermi GBM Final Real-time Localization
  100. GRB 200420: Fermi GBM Final Localization Correction

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