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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"

12172 results found.

  1. GRB 210704A: classification as long GRB and redshift estimating
  2. Konus-Wind detection of a burst from SGR 1935+2154 on 2021 July 10
  3. GECAM detection of a short burst from SGR J1935+2154
  4. GRB 210712A: Swift detection of a burst
  5. GRB 210709A: AstroSat CZTI detection
  6. Fermi trigger No 647653174: Global MASTER-Net observations report
  7. GRB 210704A: Assy optical afterglow upper limit
  8. Fermi trigger No 647641569: Global MASTER-Net observations report
  9. Fermi trigger No 647624281: Global MASTER-Net observations report
  10. GECAM detection of a short burst from SGR J1935+2154
  11. GECAM detection of a short burst from SGR 1935+2154
  12. Konus-Wind detection of a burst from SGR 1935+2154 on 2021 July 7
  13. GECAM detection of a short burst from SGR 1935+2154
  14. GRB 210707A: A long GRB detected by INTEGRAL
  15. GRB 210704A: CAHA 2.2m telescope optical limit
  16. Fermi trigger No 647365516: Global MASTER-Net observations report
  17. Konus-Wind detection of a burst from SGR 1935+2154 on 2021 July 6
  18. Fermi GBM Observations of SGR J1935+2154
  19. Swift-BAT detection of a burst from SGR 1935+2154
  20. GRB 210706A: optical upper limit of Sintesz-Newton/CrAO and AS-32/AbAO
  21. Konus-Wind detection of GRB 210706A
  22. GECAM detection of a bright short burst from SGR 1935+2154
  23. Integral GRB210707.02: Global MASTER-Net observations report
  24. INTEGRAL detection of a burst from SGR 1935+2154
  25. Konus-Wind detection of GRB 210704A
  26. GRB 210704B: AstroSat CZTI detection
  27. GRB 210704A: Assy optical afterglow candidate
  28. GRB 210704A: AstroSat CZTI detection
  29. IceCube-210516A: No counterpart candidates in INTEGRAL SPI-ACS and IBIS prompt observation
  30. GRB 210704A: Fermi-LAT detection
  31. Fermi trigger No 647108723: Global MASTER-Net observations report
  32. Fermi trigger No 647120009: Global MASTER-Net observations report
  33. Konus-Wind detection of GRB 210702A
  34. GRB 210702A: AGILE detection
  35. GRB 210619B: JCMT SCUBA-2 sub-mm observations
  36. GRB 210702A: VLT/X-shooter redshift
  37. Swift GRB 210702A: Global MASTER-Net observations report
  38. Swift GRB210702.80: Global MASTER-Net OT detection
  39. IceCube-210629A: No counterpart candidates in INTEGRAL SPI-ACS and IBIS prompt observation
  40. Fermi-LAT Gamma-ray Observations of IceCube-210629A
  41. GRB 210627B: GECAM detection
  42. IceCube Alert 210629.76: Global MASTER-Net observations report
  43. GRB 210619B: Sayan observatory 1.6-m telescope observations
  44. GRB 210626A: CAHA 2.2m telescope optical limit
  45. GRB 210619B: Deep CAHA 2.2m detection and late-time light curve behavior
  46. Fermi GRB 210627B: Global MASTER-Net observations report
  47. GRB 210627B: BALROG localization (Fermi Trigger 646509445/ GRB 210627748)
  48. GRB 210627B: Fermi GBM Final Real-time Localization
  49. Fermi GRB 210627A: Global MASTER-Net observations report
  50. Fermi GRB 210626A: Global MASTER-Net observations report
  51. GRB 210626A: Swift/BAT-GUANO detection and arcminute localization
  52. Fermi trigger No 646189108: Global MASTER-Net observations report
  53. Fermi GBM observation of a bright burst in the direction of SGR 1935+2154
  54. GRB 210619B: Mini-MegaTORTORA early optical observations
  55. GRB 210619B: possibility of lensed visible afterglow?
  56. Swift Trigger 1057131: detection of a burst from SGR Swift J1555.2-5402
  57. Swift GRB210621.71: Global MASTER-Net observations report
  58. GRB 210619B: 1.5m OSN optical observation
  59. GRB 210619B: iTelescope optical afterglow observation
  60. GRB 210619B: SAO RAS optical observations
  61. GRB 210619B: REM optical/NIR afterglow detection
  62. GRB 210619B: Liverpool Telescope First Hour Observations
  63. GRB 210619B: Swift/UVOT Detection
  64. Konus-Wind detection of GRB 210619B
  65. GRB 210619B: CAHA 2.2m photometric monitoring
  66. GRB 210619B: Liverpool Telescope r'-band observations
  67. GRB 210619B: Liverpool telescope imaging of a red afterglow
  68. GRB 210619B: Fermi-LAT detection
  69. GRB 210619B: SARA-KP 0.9m Optical Afterglow Detection
  70. Fermi trigger No 645857659: Global MASTER-Net observations report
  71. GRB 210619B: iTelescope T18 detection
  72. Swift GRB210619.99: Global MASTER-Net OT detection
  73. Swift GRB210619.99: Global MASTER-Net observations report
  74. Swift GRB210619.99: Global MASTER-Net OT detection
  75. Swift GRB210618.07: Global MASTER-Net observations report
  76. GRB 210610B: CrAO/ZTSH continued optical observations and light curve
  77. Fermi trigger No 645485036: Global MASTER-Net observations report
  78. Fermi GRB 210615A: Global MASTER-Net observations report
  79. Swift ToO Observations of HAWC transient J0020+3108
  80. GRB 210610B: iTelescope optical afterglow observations
  81. GRB 210610B: Further SAO RAS optical observations
  82. GRB 210610A: SAO RAS optical observations
  83. GRB 210610B: optical observations from Burke-Gaffney Observatory and Abbey Ridge Observatory
  84. GRB 210610B: optical photometry of afterglow at INASAN/Simeiz
  85. GRB 210607C: AstroSat CZTI detection
  86. GRB210610B: SARA-KP 0.9m Optical Afterglow Detection
  87. GRB 210610B: MITSuME Akeno optical observation
  88. GRB 210610B: CrAO/ZTSH optical observations and light curve
  89. GRB 210610B: Swift-XRT refined Analysis
  90. GRB 210610B: optical afterglow observations
  91. GRB 210610B: University of Siena Observatory optical photometry of the afterglow
  92. Konus-Wind detection of GRB 210610A
  93. Konus-Wind detection of GRB 210610B
  94. GRB 210610B: AGILE detection
  95. GRB 210610B: Redshift confirmation from GTC
  96. GRB 210610A: Swift-XRT refined Analysis
  97. GRB 210610B: SAO RAS optical observations
  98. Fermi trigger No 645047470: Global MASTER-Net observations report
  99. GRB 210610B: CrAO/ZTSh optical afterglow photometry
  100. GRB 210610B: BOOTES-2/TELMA optical observation

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