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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"

24588 results found.

  1. IPN triangulation of GRB 220601A (long)
  2. Fermi trigger No 675992935: Global MASTER-Net observations report
  3. GRB 220603A: Swift/BAT-GUANO detection outside the coded FOV
  4. Fermi-GBM will trial new SAA regions from Tuesday June 7th
  5. GRB 220527A: MITSuME Akeno continued optical observation
  6. Konus-Wind detection of GRB 220528A
  7. IPN triangulation of GRB 220528A (short)
  8. GRB 220528A: Fermi GBM Observation
  9. Fermi GRB 220530A: Global MASTER-Net observations report
  10. Konus-Wind observation of GRB 220527A
  11. GRB 220530A: Fermi GBM Final Real-time Localization
  12. GRB 220528B: Swift/BAT-GUANO detection outside the coded FOV
  13. GRB 220528A: Fermi GBM Final Localization
  14. GRB 220527A: REM optical/NIR observations
  15. Fermi trigger No 675411172: Global MASTER-Net observations report
  16. GRB 220527A: CALET Gamma-Ray Burst Monitor detection
  17. GRB 220527A: MITSuME Akeno optical observation
  18. LAT GRB220527.39: Global MASTER-Net observations report
  19. GRB 220527A: Swift/UVOT detection
  20. GRB 220527A: Fermi GBM Observation
  21. GRB 220527A: Fermi-LAT detection
  22. GRB 220527A: Fermi GBM Final Localization
  23. GRB 220527A: AGILE detection
  24. GRB 220521B: CALET Gamma-Ray Burst Monitor detection
  25. GRB 220525A: Fermi GBM Detection
  26. Konus-Wind detection of a burst from SGR 1935+2154 on 2022 May 25
  27. GRB 220525A: CALET Gamma-Ray Burst Monitor detection
  28. Konus-Wind detection of GRB 220524B
  29. Konus-Wind detection of GRB 220525A
  30. Konus-Wind detection of GRB 220524A
  31. Swift GRB220526.48: Global MASTER-Net observations report
  32. Fermi GRB 220525A: Global MASTER-Net observations report
  33. IPN triangulation of GRB 220525A
  34. IPN triangulation of GRB 220524B
  35. Fermi-LAT Gamma-ray Observations of IceCube-220524A
  36. IPN triangulation of GRB 220524A
  37. IceCube-220524A: Upper limits from a search for additional neutrino events in IceCube
  38. GRB 220525A: BALROG localization (Fermi Trigger 675130259 / GRB 220525008)
  39. GRB 220525A: Fermi GBM Final Real-time Localization
  40. GRB 220521A: ATCA detection
  41. Konus-Wind detection of GRB 220522B
  42. IPN triangulation of GRB 220522B
  43. Konus-Wind detection of GRB 220521B
  44. GRB 220521A: classification and detection by SPI-ACS/INTEGRAL
  45. IPN triangulation of GRB 220521B
  46. IceCube-220524A - IceCube observation of a high-energy neutrino candidate track-like event
  47. GRB 220521A: MITSuME Akeno optical upper limits
  48. Fermi GRB 220523B: Global MASTER-Net observations report
  49. GRB 220523B: Fermi GBM detection
  50. GRB 220521A: MMT Afterglow Imaging
  51. GRB 220521A: REM optical/NIR upper limits
  52. GRB 220514A: Swift/BAT-GUANO detection outside the coded FOV
  53. VLA observations of GW170817 at ~4.8 years after the merger
  54. Fermi GRB 220523A: Global MASTER-Net observations report
  55. GRB 220523A: Fermi GBM Final Real-time Localization
  56. GRB 220521A: LCO Optical Detection
  57. GRB 220521A: Swift-BAT refined analysis
  58. GRB 220521A: Fermi GBM detection
  59. GRB 220521A: Swift-XRT refined Analysis
  60. Fermi GRB 220522A: Global MASTER-Net observations report
  61. Fermi trigger No 674868783: Global MASTER-Net observations report
  62. GRB 220522A: Fermi GBM Final Real-time Localization
  63. GRB 220521A: NOT spectroscopic redshift
  64. GRB 220521A: Swift detection of a burst
  65. GRB 220521A: Fermi GBM Final Real-time Localization
  66. Swift GRB220521.97: Global MASTER-Net observations report
  67. Konus-Wind detection of GRB 220519A
  68. IPN triangulation of GRB 220519A
  69. GRB 220518A: Swift-BAT refined analysis
  70. Swift GRB220519.84: Global MASTER-Net observations report
  71. GRB 220518A: Swift-XRT refined Analysis
  72. Fermi GRB 220518B: Global MASTER-Net observations report
  73. GRB 220518B: Fermi GBM Final Real-time Localization
  74. Swift GRB 220518A: Global MASTER-Net observations report
  75. GRB 220518A: Swift detection of a burst
  76. GRB 220514A: MITSuME Akeno optical observation
  77. GRB 220514A: GRANDMA Optical Afterglow Observations
  78. Konus-Wind detection of GRB 220506A
  79. Konus-Wind detection of GRB 220514B
  80. Fermi trigger No 674397342: Global MASTER-Net observations report
  81. GRB 220514A: Fermi GBM observation
  82. GRB 220514B: Swift-XRT observations
  83. GRB 220514A: KAIT Optical Afterglow Confirmation
  84. Fermi-LAT Gamma-ray Observations of IceCube-220513A
  85. IceCube-220513A: Upper limits from a search for additional neutrino events in IceCube
  86. IceCube-220513A: No significant detection in HAWC
  87. MAXI GRB220514.98: Global MASTER-Net observations report
  88. Integral GRB220514.52: Global MASTER-Net observations report
  89. Fermi GRB 220514A: Global MASTER-Net observations report
  90. IceCube-220513A: No Candidate Counterparts from the Zwicky Transient Facility
  91. GRB 220514A: BALROG localization (Fermi Trigger 674223877 / GRB 220514517)
  92. GRB 220514A: Fermi GBM Final Real-time Localization
  93. IceCube-220513A - IceCube observation of a high-energy neutrino candidate track-like event
  94. IceCube Alert 220513.97: Global MASTER-Net observations report
  95. Fermi GRB 220513A: Global MASTER-Net observations report
  96. GRB 220513A: Fermi GBM Final Real-time Localization
  97. Konus-Wind detection of GRB 220511A
  98. IceCube-220509A: No significant detection in HAWC
  99. GRB 220511A: Fermi GBM observation
  100. GRB 220511A: Swift-XRT observations

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