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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.

Advanced Search Examples (click to copy):

subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

45802 results found.

  1. GRB 240123A: Swift-BAT refined analysis
  2. IceCube Alert 240123.48: Global MASTER-Net observations report
  3. GRB 240123A: Mondy continued optical observations and the PL decay index
  4. GRB 240123A: SAO RAS optical observations
  5. GRB 240123A : MITSuME Akeno optical afterglow candidate detection
  6. GRB 240123A: Enhanced Swift-XRT position
  7. GRB 240124A?: BALROG localization (Fermi Trigger 727752941 / GRB 240124066)
  8. Fermi GRB 240123B: Global MASTER-Net observations report
  9. GRB 240122A: Swift/UVOT Upper Limits
  10. GRB 240123A: Swift-XRT refined Analysis
  11. GRB 240122A: BOOTES-2/TELMA optical upper limit and 1.5m OSN detection
  12. Fermi GBM Sub-Threshold Detection of GRB 240123A
  13. GRB 240123A: Mondy continued optical observations + correction of the GRB name in GCN 35605
  14. GRB 240123B: Fermi GBM Final Real-time Localization
  15. GRB 240118A: Swift/UVOT Upper Limits
  16. GRB 240122B: Glowbug gamma-ray detection
  17. GRB 240123A: Mondy optical afterglow observations
  18. IceCube-240123A - IceCube observation of a high-energy neutrino candidate track-like event
  19. Konus-Wind detection of GRB 240112A
  20. GRB 240123A: Swift detection of a burst with a possible optical counterpart
  21. Swift GRB240123.46: Global MASTER-Net observations report
  22. GRB 240122A: Swift-XRT afterglow detection
  23. GRB 240122A: VLT/X-shooter redshift confirmation
  24. GRB 240122A: Redshift from OSIRIS+/GTC
  25. GRB 240122A: LT non-detection of GOTO candidate counterpart confirms fading
  26. GRB 240122A: GOTO optical counterpart candidate
  27. GRB 240122A: Tiled Swift observations
  28. Konus-Wind detection of GRB 240119A (short/hard)
  29. GRB 240122A: MAXI/GSC detection
  30. IPN triangulation of GRB 240119A (short)
  31. GRB 240119A: GECAM detection of a short burst
  32. GRB 240118C: GECAM-B detection of a long burst
  33. GRB 240119A: AstroSat CZTI detection of a short burst
  34. GRB 240118A: Mondy optical observations
  35. GRB 240118A: Swift-XRT afterglow detection
  36. GRB 240118C: Fermi GBM Observation
  37. Fermi GRB 240119A: Global MASTER-Net observations report
  38. IceCube-240105A: Detection of NIR flare of PKS 0446+11 with WINTER
  39. GRB 240119A: Fermi GBM Final Localization
  40. GRB 240117A: CALET Gamma-Ray Burst Monitor detection
  41. GRB 240118C: Swift/BAT-GUANO detection of a burst
  42. GRB 240118A: GRBAlpha detection
  43. AMON Coincidence Alert from the sub-threshold IceCube-HAWC search NuEm-240118A: correction on the localization
  44. GRB 240115A: Fermi GBM Observation
  45. Swift triggers 1209631, 1209632, 1209635 and 1209644 are not interesting astrophysical events
  46. GRB 240118C: Fermi GBM Final Localization
  47. GRB 240118D: AstroSat CZTI detection
  48. GRB 240117A: AstroSat CZTI detection
  49. GRB 240118A: Swift ToO observations
  50. GRB 240118A: AbAO optical upper limit
  51. Fermi GRB 240118B: Global MASTER-Net observations report
  52. GRB 240118A: NuSTAR Offline Analysis of the GRB
  53. GRB 240117A: Glowbug gamma-ray detection
  54. GRB 240118A: Swift/BAT-GUANO detection of a burst outside the coded FOV
  55. Konus-Wind detection of GRB 240118A
  56. AMON Coincidence Alert from the sub-threshold IceCube-HAWC search NuEm-240118A
  57. GRB 240118C: BALROG localization (Fermi Trigger 727291408 / GRB 240118725)
  58. GRB 240118A: NuSTAR Detection of a Long GRB
  59. GRB 240118A: Fermi GBM Observation
  60. GRB 240118B: Fermi GBM Final Real-time Localization
  61. LAT GRB240118.08: Global MASTER-Net observations report
  62. GRB 240118A: Fermi-LAT detection
  63. GRID detection of GRB 231230A
  64. GRB 240118A: Fermi GBM Final Real-time Localization
  65. GRB 240115A: Swift/BAT-GUANO detection of a short burst
  66. Swift Trigger 1209406 is not an astrophysical event
  67. Swift Triggers 1209401 and 1209403 are not astrophysical events
  68. IPN triangulation of GRB 240112A (long)
  69. Swift Triggers 1209371 through 1209374 are not astrophysical events
  70. Swift Triggers 1209369 and 1209370 are not astrophysical events
  71. GRB 240115B: AstroSat CZTI detection
  72. LIGO/Virgo/KAGRA S240109a: Upper limits from Swift/BAT-GUANO
  73. GRB 240115B: Fermi GBM Detection
  74. IceCube-240105A: ZTF optical observation of blazar PKS 0446+11
  75. GRB 240112D: Glowbug gamma-ray detection
  76. GRB 240112C: Glowbug gamma-ray detection
  77. GRB 240112C: VZLUSAT-2 detection
  78. GRB 240107A: VZLUSAT-2 detection
  79. Integral GRB240115.70: Global MASTER-Net observations report
  80. Fermi GRB 240115B: Global MASTER-Net observations report
  81. GRB 240115B: A long GRB detected by INTEGRAL
  82. GRB 240115B: Fermi GBM Final Real-time Localization
  83. Konus-Wind detection of GRB 240112C
  84. Fermi GRB 240115A: Global MASTER-Net observations report
  85. GRB 240115A: Fermi GBM Final Real-time Localization
  86. GRB 240112C: GRBAlpha detection
  87. GRB 240114A: MAXI/GSC detection
  88. GRB 240112C: Swift/UVOT Detection
  89. GRB 240112C: Fermi GBM Detection
  90. Fermi trigger No 726773850: Global MASTER-Net observations report
  91. GRB 240112C: Swift-XRT refined Analysis
  92. GRB 240112C: SAO RAS optical observations
  93. GRB 240112E: Fermi GBM Final Localization
  94. Fermi GRB 240112D: Global MASTER-Net observations report
  95. GRB 240112D: Fermi GBM Final Real-time Localization
  96. Fermi trigger No 726774492: Global MASTER-Net observations report
  97. Swift GRB 240112C: Global MASTER-Net observations report
  98. Fermi GRB 240112B: Global MASTER-Net observations report
  99. GRB 240109A: Swift-BAT refined analysis
  100. GRB 240112C: Swift detection of a burst with an optical counterpart

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