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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').
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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"

32762 results found.

  1. Fermi GRB 220211B: Global MASTER-Net observations report
  2. GRB 220209A: Fermi-LAT detection
  3. GRB 220210A: Fermi-LAT detection
  4. GRB 220210A: AGILE detection
  5. GRB 220210A: Swift/BAT-GUANO localization
  6. Fermi GRB 220211A: Global MASTER-Net observations report
  7. Fermi GRB 220210A: Global MASTER-Net observations report
  8. GRB 210919A: Maidanak optical observations
  9. GRB 210919A: SPI-ACS/INTEGRAL observation and evaluation of Ep
  10. GRB 220209A: Fermi GBM Detection
  11. GRB 220209A: GECAM detection
  12. GRB 220209A: AGILE/MCAL detection
  13. Fermi GRB 220209A: Global MASTER-Net observations report
  14. Fermi-LAT Gamma-ray Observations of IceCube-220205B
  15. Fermi-LAT Gamma-ray Observations of IceCube-220205A
  16. IceCube-220205B: No neutrino counterpart candidates in ANTARES search
  17. Konus-Wind detection of GRB 220130A
  18. IceCube-220205B - IceCube observation of a high-energy neutrino candidate track-like event
  19. Konus-Wind detection of GRB 220203A
  20. GRB 220203A: GECAM detection
  21. IceCube-220205A - IceCube observation of a high-energy neutrino candidate track-like event
  22. GRB 220203A: Swift/BAT-GUANO detection outside the coded FOV
  23. IPN triangulation of GRB 220203A (short)
  24. IPN triangulation of GRB 220130A
  25. Fermi-LAT Gamma-ray Observations of IceCube-220202A
  26. GRB 211227A: Konus-Wind detection and joint Konus-Wind+Swift-BAT spectral analysis
  27. GRB 220131B: Swift/BAT-GUANO detection outside the coded FOV
  28. GRB 220128A: AstroSat CZTI detection
  29. GRB 220130A: Fermi GBM Observation
  30. Konus-Wind detection of GRB 220128A
  31. IPN triangulation of GRB 220128A (long)
  32. Fermi GRB 220131A: Global MASTER-Net observations report
  33. Fermi GRB 220129A: Global MASTER-Net observations report
  34. IceCube-211208A: the optical observation of the candidate PKS0735+178
  35. Konus-Wind detection of GRB 220124A
  36. IPN triangulation of GRB 220124A
  37. GRB 220124A: GECAM detection
  38. GRB 220117A, GROND observations
  39. GRB 220117A: Terskol and AbAO optical upper limits
  40. GRB 220118A: TARGET optical upper limit
  41. GRB 220117B: TARGET optical upper limit
  42. AGILE observations of a bright burst from SGR 1935+2154
  43. Fermi-LAT-ANTARES 220121a Coincidence
  44. Konus-Wind detection of an intermediate flare from SGR 1935+2154 on January 20
  45. IPN triangulation of a bright burst from SGR 1935+2154
  46. GRB 220117A: Konus-Wind detection and joint Konus-Wind + Swift-BAT spectral analysis
  47. IPN triangulation of GRB 211226A
  48. GRB 220117C: Fermi GBM Observation
  49. GRB 220118A: 2.2m CAHA/CAFOS detections
  50. GRB 220118A: Fermi GBM detection
  51. GRB 220118A: COATLI Optical Observations
  52. GRB 220101A: KAO optical-R observation
  53. GRB 211221A: No V & R detection, KAO telescope
  54. GRB 220118A: NUTTelA-TAO / BSTI Early Optical Limits (Preliminary)
  55. GRB 220117C: Swift/BAT-GUANO arcminute localization
  56. Swift currently in safe hold with science slews disabled
  57. GRB 220118A: Swift-BAT refined analysis
  58. GRB 220118A: Swift/UVOT Detection
  59. Konus-Wind observation of the recent SGR 1935+2154 activity
  60. GRB 220118A: GIT optical observations
  61. GRB 220118A: MITSuME Akeno optical observation
  62. GRB 220117B: z-band limit
  63. Swift GRB 220118A: Global MASTER-Net observations report
  64. GRB 220117A: MITSuME Akeno optical upper limits
  65. Fermi GBM Sub-Threshold Detection of GRB 220117A
  66. GRB 220117B: Swift-BAT refined analysis
  67. GRB 220117A: Swift-BAT refined analysis
  68. GRB 220117B: Swift/UVOT Upper Limits
  69. GRB 220117A: Swift/UVOT Upper Limits
  70. GRB 220117A: LCO Optical Observations
  71. GRB 220117A: VLT/X-shooter optical afterglow and redshift
  72. Fermi-LAT Gamma-ray Observations of IceCube-220115A and detection of a new gamma-ray source, Fermi J2350.2+2620
  73. GRB 220117B: Swift-XRT refined Analysis
  74. GRB 220117A: Swift-XRT refined Analysis
  75. GRB 220117B: Nanshan/NEXT optical upper limit
  76. GRB 220117B: MITSuME Akeno optical upper limits
  77. GRB 220101A: TSHAO optical observation, Terskol, AbAO upper limits
  78. Swift GRB 220117A: Global MASTER-Net observations report
  79. Swift GRB 220117B: Global MASTER-Net observations report
  80. GRB 220117A: Nanshan/NEXT optical observations and a nearby PanSTARRS source
  81. GRB 220101A: The most powerful GRB and BDHN I in 26 years
  82. GRB 210919A: LBT spectroscopic redshift of the host galaxy candidates
  83. AGILE observations of a burst from SGR 1935+2154
  84. GRB 220101A: continued 1.3m DFOT optical observations of a high-redshift afterglow
  85. GRB 220111A: AstroSat CZTI detection
  86. Fermi GRB 220111A: Global MASTER-Net observations report
  87. Konus-Wind detection of GRB 220101A (correction to GCN 31433)
  88. Konus-Wind detection of GRB 220101A
  89. GRB 220107A: SAO RAS optical observations
  90. Konus-Wind detection of GRB 220107B
  91. Konus-Wind detection of GRB 220107A
  92. Confirmation of the X-ray afterglow of GRB 220107B
  93. GRB 220107A: further SAO RAS optical observations
  94. GRB 220101A: Additional Liverpool telescope photometry
  95. GRB 220107A: SAO RAS optical observations
  96. GRB 220101A: SAO RAS optical observations
  97. GRB 220107A: AbAO and Terskol optical observations
  98. GRB 220107B: MITSuME Akeno optical upper limits
  99. GRB 220107B: Nanshan/NEXT optical upper limits and host galaxy candidate
  100. GRB 220107A: Nanshan/NEXT optical observations

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