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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"

36317 results found.

  1. Fermi GRB 240119A: Global MASTER-Net observations report
  2. GRB 240119A: Fermi GBM Final Localization
  3. GRB 240117A: CALET Gamma-Ray Burst Monitor detection
  4. GRB 240118C: Swift/BAT-GUANO detection of a burst
  5. GRB 240118A: GRBAlpha detection
  6. GRB 240115A: Fermi GBM Observation
  7. GRB 240118C: Fermi GBM Final Localization
  8. GRB 240118D: AstroSat CZTI detection
  9. GRB 240117A: AstroSat CZTI detection
  10. GRB 240118A: Swift ToO observations
  11. GRB 240118A: AbAO optical upper limit
  12. Fermi GRB 240118B: Global MASTER-Net observations report
  13. GRB 240118A: NuSTAR Offline Analysis of the GRB
  14. GRB 240117A: Glowbug gamma-ray detection
  15. GRB 240118A: Swift/BAT-GUANO detection of a burst outside the coded FOV
  16. Konus-Wind detection of GRB 240118A
  17. GRB 240118C: BALROG localization (Fermi Trigger 727291408 / GRB 240118725)
  18. GRB 240118A: NuSTAR Detection of a Long GRB
  19. GRB 240118A: Fermi GBM Observation
  20. GRB 240118B: Fermi GBM Final Real-time Localization
  21. GRB 240118A: Fermi-LAT detection
  22. GRID detection of GRB 231230A
  23. GRB 240118A: Fermi GBM Final Real-time Localization
  24. GRB 240115A: Swift/BAT-GUANO detection of a short burst
  25. IPN triangulation of GRB 240112A (long)
  26. GRB 240115B: AstroSat CZTI detection
  27. LIGO/Virgo/KAGRA S240109a: Upper limits from Swift/BAT-GUANO
  28. GRB 240115B: Fermi GBM Detection
  29. GRB 240112D: Glowbug gamma-ray detection
  30. GRB 240112C: Glowbug gamma-ray detection
  31. GRB 240112C: VZLUSAT-2 detection
  32. GRB 240107A: VZLUSAT-2 detection
  33. Fermi GRB 240115B: Global MASTER-Net observations report
  34. GRB 240115B: A long GRB detected by INTEGRAL
  35. GRB 240115B: Fermi GBM Final Real-time Localization
  36. Konus-Wind detection of GRB 240112C
  37. Fermi GRB 240115A: Global MASTER-Net observations report
  38. GRB 240115A: Fermi GBM Final Real-time Localization
  39. GRB 240112C: GRBAlpha detection
  40. GRB 240114A: MAXI/GSC detection
  41. GRB 240112C: Swift/UVOT Detection
  42. GRB 240112C: Fermi GBM Detection
  43. GRB 240112C: Swift-XRT refined Analysis
  44. GRB 240112C: SAO RAS optical observations
  45. GRB 240112E: Fermi GBM Final Localization
  46. Fermi GRB 240112D: Global MASTER-Net observations report
  47. GRB 240112D: Fermi GBM Final Real-time Localization
  48. Swift GRB 240112C: Global MASTER-Net observations report
  49. Fermi GRB 240112B: Global MASTER-Net observations report
  50. GRB 240109A: Swift-BAT refined analysis
  51. GRB 240112C: Swift detection of a burst with an optical counterpart
  52. GRB 240112B: Fermi GBM Final Real-time Localization
  53. GRB 240112A: GECAM detection of a burst
  54. GRB 240109A: Fermi GBM Observation
  55. GRB 240110A: AstroSat CZTI detection
  56. GRB 240108A: Glowbug gamma-ray detection
  57. GRB 231214A: ATCA Radio Upper Limits
  58. GRB 240106B: Glowbug gamma-ray detection
  59. GRB 240106A: Glowbug gamma-ray detection
  60. IceCube-240105A: Upper limits from a search for additional neutrino events in IceCube
  61. GRB 240109B: Fermi GBM Final Real-time Localization
  62. Konus-Wind detection of GRB 240101C
  63. GRB 231215A: radio detection with the VLA
  64. GRB 230818A: further radio observations with the VLA
  65. GRB 230812B: further radio observations with the VLA
  66. GRB 240107A: AstroSat CZTI detection
  67. GRB 240109A: Swift detection of a short burst
  68. LIGO/Virgo/KAGRA S240104bl: Upper limits from Swift/BAT-GUANO
  69. GRB 240106A: GRBAlpha detection
  70. GRB 240107A: MAXI/GSC detection
  71. GRB 240106B: Fermi GBM Final Real-time Localization
  72. GRB 240106A: Fermi GBM Final Real-time Localization
  73. IPN triangulation of GRB 240101C (short)
  74. GRB GRB240101C: Fermi GBM observation
  75. GRB 240101A: 1.3m DFOT optical observations
  76. GRB 240102A: 1.3m DFOT optical upper limit
  77. GRB 240101B: 1.3m DFOT optical upper limit
  78. GRB 240101C: Swift/BAT-GUANO detection of a short burst
  79. GRB 240102C: AstroSat CZTI detection
  80. GRB 240101C: AstroSat CZTI detection
  81. GRB 231220A: Swift-UVOT upper limit
  82. GRB 240102A: Swift-BAT refined analysis
  83. GRB 240102A: Swift/UVOT Upper Limits
  84. GRB 231230A: Swift-BAT refined analysis
  85. GRB 240101A: Swift-BAT refined analysis
  86. GRB 240101B: Swift-BAT refined analysis
  87. GRB 240102A: Enhanced Swift-XRT position
  88. GRB 240101B: Swift-XRT refined Analysis
  89. GRB 240102A: Swift-XRT refined Analysis
  90. GRB 240102B (Fermi GBM trigger 725926335/240102925) is not a GRB
  91. GRB 240102A: LCOGT Optical Upper Limits
  92. GRB240102A: BOOTES-6/DPRT optical upper limit
  93. GRB 240102B: Fermi GBM Final Real-time Localization
  94. GRB 240101B: MarSEC Observatory, Vicenza, Italy, UPPER LIMIT
  95. GRB 240102A: Swift detection of a burst
  96. GRB 240101A: Terskol Zeiss-2000 optical observations
  97. GRB 240101C: GRBAlpha detection
  98. GRB 240101B: Swift/UVOT Upper Limits
  99. GRB 240101A: Swift/UVOT Upper Limits
  100. GRB 240101A: Swift-XRT refined Analysis

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