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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"

12124 results found.

  1. Fermi-LAT gamma-ray observations of IceCube-240327B
  2. Fermi-LAT gamma-ray observations of IceCube-240327A
  3. GRB 240331A: GRBAlpha detection
  4. Konus-Wind detection of LXT 240402A/GRB 240402B
  5. LXT 240402A: MASTER optical observations with AGN in error-box
  6. Fermi GRB 240402A: Global MASTER-Net observations report
  7. X-ray transient EP240331a: Kinder optical upper limits
  8. X-ray transient EP240331A: GRANDMA-Kilonova catcher optical upper limit
  9. EP240331A: MASTER optical observations
  10. X-ray transient EP20240331a: MeerLICHT optical upper limits
  11. IceCube-240327B: Upper limits from a search for additional neutrino events in IceCube
  12. GRB 240324A: AstroSat CZTI detection of a short burst
  13. GRB 240331A: AstroSat CZTI detection
  14. GRB 240329A: AstroSat CZTI detection
  15. X-ray transient EP240315a: continued ATCA monitoring
  16. X-ray transient EP240315a: e-MERLIN radio observations
  17. GRB 240320A: Glowbug gamma-ray detection
  18. Fermi GRB 240320A: Global MASTER-Net observations report
  19. Konus-Wind detection of GRB 240315C (possible counterpart of EP240315a)
  20. Fermi trigger No 732657380: Global MASTER-Net observations report
  21. GRB 240318A: Swift/BAT-GUANO detection of a burst outside the coded FOV
  22. X-ray transient EP240315a: ATCA detection of radio counterpart
  23. GRB 240320A: Fermi GBM Final Real-time Localization
  24. IPN triangulation of GRB 240315C (consistent with a fast X-ray transient EP240315a)
  25. X-ray transient EP 240315a: Chandra observations
  26. GRB 240317C: Glowbug gamma-ray detection
  27. X-ray transient EP240315a: PRIME near infrared detection
  28. Fermi GRB 240318A: Global MASTER-Net observations report
  29. GRB 240317A: AstroSat CZTI detection
  30. GRB 240315B: AstroSat CZTI detection
  31. X-ray transient EP240315a: Montarrenti Observatory optical upper limit
  32. Fermi GRB 240317B: Global MASTER-Net observations report
  33. Fermi trigger No 732299243: Global MASTER-Net observations report
  34. Fermi GRB 240314A: Global MASTER-Net observations report
  35. GRB 240312A: GECAM detection of a long burst
  36. GRB 240303C: VZLUSAT-2 detection
  37. Fermi trigger No 731839490: Global MASTER-Net observations report
  38. Fermi-LAT gamma-ray observations of IceCube-240307A
  39. Fermi GRB 240310A: Global MASTER-Net observations report
  40. GRB 240309A: MAXI/GSC detection
  41. Fermi trigger No 731571927: Global MASTER-Net observations report
  42. Konus-Wind detection of GRB 231118A
  43. GRB 240306A: AstroSat CZTI detection
  44. Fermi GRB 240306A: Global MASTER-Net observations report
  45. Fermi GRB 240305A: Global MASTER-Net observations report
  46. GRB 240306A: Swift/BAT-GUANO detection of a burst
  47. Fermi-LAT gamma-ray observations of IceCube-240229A
  48. GRB 240305C: AstroSat CZTI detection of a short burst
  49. Fermi GRB 240305C: Global MASTER-Net observations report
  50. Konus-Wind detection of GRB 240227A (short/hard)
  51. Swift Trigger 1218701: Yes, we triggered on Swift J151857.0-572147 again
  52. Swift Trigger 1218696: Another trigger on Swift J151857.0-572147
  53. Konus-Wind detection of GRB 240303B
  54. GRB 240303B: Fermi GBM Detection
  55. GRB 240225B: Swift-XRT afterglow detection
  56. Fermi trigger No 731161136: Global MASTER-Net observations report
  57. GRB 240303C: BALROG localization (Fermi Trigger 731189113 / GRB 240303837)
  58. GRB 240225B: Glowbug gamma-ray detection
  59. GRB 240225A (short): Glowbug gamma-ray detection
  60. Konus-Wind detection of GRB 240225B (long)
  61. GRB 240225B: SAO RAS optical observations
  62. IPN triangulation of GRB 240227A (short)
  63. GRB 240225B: Liverpool Telescope optical afterglow observations
  64. GRB 240225B: CALET Gamma-Ray Burst Monitor detection
  65. Transient EPW20240219aa: REM optical/NIR upper limits
  66. GRB 240225B: AstroSat CZTI detection
  67. GRB 240225B: MAXI/GSC detection
  68. GRB 240225A: Swift/BAT-GUANO detection of a short burst
  69. Transient EPW20240219aa: 7DT Optical Upper Limits
  70. VLA X-band observation of EPW20240219aa
  71. Transient EPW20240219aa: Mondy optical observations
  72. Transient EPW20240219aa: Liverpool Telescope non-detection and limiting magnitude
  73. GRB 240222A: Swift detection of a burst
  74. Swift GRB240221.92: Global MASTER-Net observations report
  75. GRB 240215B: Fermi GBM Observation
  76. GRB 240218A: LBT H-band detection
  77. Fermi GRB 240220A: Global MASTER-Net observations report
  78. GRB 240220A: Fermi GBM Final Real-time Localization
  79. Konus-Wind detection of GRB 240218A
  80. GRB 240218A: Swift-XRT refined Analysis
  81. GRB 240218A: Fermi GBM Detection
  82. IPN triangulation of GRB 240209A
  83. Fermi trigger No 729914426: Global MASTER-Net observations report
  84. Gamma-ray flaring activity from the blazar 1ES 1959+650 observed by the Fermi-LAT
  85. GRB 240213A: GRBAlpha detection
  86. GRB 240215B: Swift/BAT-GUANO detection of a burst outside the coded FOV
  87. GRB 240213A: Glowbug gamma-ray detection
  88. GRB240209A: OHP/T193 detection of the GOTO afterglow candidate AT2024cew / GOTO24pw
  89. GRB 240214A/1H 0451-560: MAXI/GSC detection
  90. GRB 240213A: BALROG localization (Fermi Trigger / GRB 240213841)
  91. Fermi GRB 240213A: Global MASTER-Net observations report
  92. GRB 240213A: Fermi GBM Final Real-time Localization
  93. Konus-Wind detection of GRB 240204A
  94. Konus-Wind detection of GRB 240205A (short)
  95. Fermi trigger No 729152364: Global MASTER-Net observations report
  96. IPN triangulation of GRB 240205A (short)
  97. Fermi-LAT gamma-ray observations of IceCube-240204A
  98. GRB 240205A (short): Glowbug gamma-ray detection
  99. GRB 240205B: AstroSat CZTI detection
  100. Fermi trigger No 729012023: Global MASTER-Net observations report

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