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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"

11854 results found.

  1. IceCube-200530A: No significant detection in HAWC
  2. Konus-Wind observation of GRB 200524A
  3. IceCube-200530A - IceCube observation of a high-energy neutrino candidate event
  4. GRB 200529A: BOOTES-2/TELMA early optical upper limit
  5. GRB 200528A: Swift-XRT refined Analysis
  6. GRB 200524A: Assy continued optical observations
  7. GRB 200528A: Assy optical upper limit
  8. Swift GRB200529.04: Global MASTER-Net observations report
  9. GRB 200524A: Assy optical observations
  10. GRB 200524A: CrAO optical observations
  11. Fermi-LAT Gamma-ray Observations of IceCube-190523A
  12. Fermi GRB 200524A: Global MASTER-Net observations report
  13. GRB 200524A: Fermi-LAT detection
  14. Konus-Wind detection of short/hard GRB 200521A
  15. IPN triangulation of GRB 200521A (short)
  16. GRB 200522A: LCO Optical Afterglow Detection
  17. IceCube-200523A - IceCube observation of a high-energy neutrino candidate event
  18. GRB 200522A: Swift-XRT refined Analysis
  19. GRB 200521A: AGILE/MCAL and ratemeters detection
  20. GRB 200519A: CALET Gamma-Ray Burst Monitor detection
  21. GRB 200519A: R-band follow-up from HCT
  22. GRB 200519A: Insight-HXMT/HE detection
  23. GRB 200519A: Swift/UVOT Detection
  24. Fermi trigger No 611676654: Global MASTER-Net observations report
  25. GRB 200519A: GROWTH-India optical follow-up
  26. GRB 200519A: AstroSat CZTI detection
  27. Swift GRB 200519A: Global MASTER-Net observations report
  28. Fermi trigger No 611605955: Global MASTER-Net observations report
  29. GRB 200519A: BOOTES-3/YA optical counterpart observations
  30. GRB 200519A: Swift detection of a burst with an optical afterglow
  31. Fermi trigger No 611434353: Global MASTER-Net observations report
  32. GRB 200517A: MAXI/GSC detection
  33. Swift GRB200516.63: Global MASTER-Net observations report
  34. GRB 200514A: MITSuME Akeno optical upper limits
  35. GRB 200514B: GROWTH-India follow-up of ZTF20aazpphd (AT2020jww)
  36. GRB 200514A: MAXI/GSC detection
  37. Baksan Neutrino Observatory Alert 200512.: Global MASTER-Net observations report
  38. Fermi GBM Sub-Threshold Detection of GRB 200512A
  39. GRB 200512A: Swift-XRT refined Analysis
  40. AGILE detection of a burst from SGR 1935+2154 on May 10, 2020
  41. GRB 200512A: Swift detection of a burst
  42. Fermi-LAT Gamma-ray Observations of IceCube-200512A
  43. IceCube-200512A: IceCube observation of a high-energy neutrino candidate event
  44. Insight-HXMT's continued observation plan for SGR J1935+2154
  45. Baksan Neutrino Observatory Alert 200511.76: Global MASTER-Net observations report
  46. Konus-Wind observation of SGR 1935+2154 activity on 2020 May 10
  47. IPN triangulation of a bright burst from SGR 1935+2154 on 2020-05-10 at 06:12 UT
  48. GRB 200509A: Swift detection of a burst with a possible optical counterpart
  49. GRB 200506A: AstroSat CZTI detection
  50. Swift GRB200506.73: Global MASTER-Net observations report
  51. GRB 200505A: AGILE detection
  52. Insight-HXMT detection of a short bright burst from SGR 1935+2154
  53. AGILE detection of a short and hard X-ray burst possibly related to SGR 1935+2154
  54. GRB 200503A: AGILE observations
  55. GRB 200502A: AGILE observations
  56. Insight-HXMT X-ray and hard X-ray upper limits to the radio burst detected by FAST from SGR 1935+2154
  57. Insight-HXMT X-ray and hard X-ray detection of the double peaks of the Fast Radio Burst from SGR 1935+2154
  58. Fermi GBM observation of a flare from the magnetar SGR 1806-20
  59. Trigger 968731: Swift detection of SGR1806-20
  60. Fermi GBM trigger 200429866/609886052 is not a GRB
  61. SGR 1935+2154: MASTER optical observations
  62. Konus-Wind observation of hard X-ray counterpart of the radio burst from SGR 1935+2154
  63. Konus-Wind observation of a very intense bursting activity of SGR 1935+2154
  64. A Forest of Bursts from SGR 1935+2154
  65. SGR 1935+2154: AstroSat CZTI detections
  66. high bursting activity of SGR 1935+2154: CGBM observations
  67. SGR 1935+2154 the Insight-HXMT observation plan
  68. SGR 1935+2154: MAXI/GSC detection
  69. Swift detection of multiple bursts from SGR 1935+2154
  70. Fermi-LAT Gamma-ray Observations of IceCube-200425A
  71. IceCube Alert 200425.98: Global MASTER-Net observations report
  72. GRB 200424A: Swift-XRT observations
  73. Konus-Wind observation of GRB 200422A
  74. GRB 200424A: a long GRB detected by INTEGRAL
  75. Konus-Wind observation of a bright burst from SGR 1935+2154
  76. GRB 200415A (possible magnetar Giant Flare in Sculptor Galaxy): INTEGRAL observations
  77. IPN triangulation of GRB 200422A (long/very bright)
  78. IceCube-200421A: Upper limits from a search for additional neutrino events in IceCube
  79. Fermi-LAT Gamma-ray Observations of IceCube-200421A
  80. Fermi GRB 200421A: Global MASTER-Net observations report
  81. IceCube-200421A: No significant detection in HAWC
  82. GRB 200421A: Fermi GBM Final Real-time Localization
  83. GRB 200420: Fermi GBM Final Localization Correction
  84. Fermi GRB 200420A: Global MASTER-Net observations report
  85. GRB 200420A: Fermi GBM Final Real-time Localization
  86. Fermi trigger No 608935505: Global MASTER-Net observations report
  87. GRB 200412B: continued AbAO, Mondy, TSHAO, Terskol optical observations
  88. GRB 200416A: Swift/UVOT Detection
  89. GRB 200412B: Swift XRT confirmation of afterglow and UVOT upper limits
  90. GRB 200415A: Fermi-LAT localization update
  91. Konus-Wind observation of GRB 200415A (a magnetar Giant Flare in Sculptor Galaxy?)
  92. GRB 200416A: Swift-XRT refined Analysis
  93. GRB 200416A: Swift detection of a burst with an optical afterglow
  94. Fermi GRB 200415A: Global MASTER-Net observations report
  95. GRB 200415A: Fermi-LAT detection
  96. Konus-Wind observation of GRB 200412B
  97. GRB 200410A: Swift-BAT refined analysis
  98. Konus-Wind observation of GRB 200412A
  99. GRB 200412B: SAO RAS observations of OT
  100. GRB 200412B: Optical afterglow detection with 1.3m DFOT

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