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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"

36178 results found.

  1. Fermi GRB 240603C: Global MASTER-Net observations report
  2. LIGO/Virgo/KAGRA S240601co: Upper limits from Swift/BAT-GUANO
  3. LIGO/Virgo/KAGRA S240530a: Upper limits from Swift/BAT-GUANO
  4. GRB 240603A: Fermi GBM Final Localization
  5. GRB 240603C: BALROG localization (Fermi Trigger 739102156 / GRB 240603423)
  6. GRB 240603C: Fermi GBM Final Real-time Localization
  7. GRB 240603B: Swift detection of a possible burst
  8. GRB 240529A: MASTER prompt OT detection
  9. GRB 240603A: GECAM detection of a short burst
  10. GRB 240529A: continued SAO RAS optical observations
  11. Fermi GRB 240602A: Global MASTER-Net observations report
  12. GRB 240529A: OSN optical detection
  13. GRB 240529A: further SAO RAS optical observations
  14. GRB 240602A: Fermi GBM Final Real-time Localization
  15. Swift Trigger 1232465 is not a GRB
  16. GRB 240529A: AKO Optical Afterglow Follow-Up Observations
  17. GRB 240529A: 1.3m DFOT Optical observations
  18. GRB 240531A: AstroSat CZTI detection of a short burst
  19. GRB 240529A : Mondy optical observations
  20. Konus-Wind detection of GRB 240529A
  21. IPN triangulation of the initial episode of GRB 240529A
  22. GRB 240529A: SAO RAS optical observations
  23. GRB 240529A: MAAO 0.7m telescope optical afterglow detection
  24. GRB 240529A: Insight-HXMT/HE detection
  25. GRB 240529A: optical photometry from Konkoly
  26. GRB 240529A: GROWTH-India optical follow-up
  27. GRB 240529A: T193/MISTRAL observations
  28. GRB 240529A: Redshift from GTC/OSIRIS+
  29. GRB 240529A: AKO Optical Afterglow Detection
  30. LIGO/Virgo/KAGRA S240527fv: Upper limits from Swift/BAT-GUANO
  31. LIGO/Virgo/KAGRA S240525p: Upper limits from Swift/BAT-GUANO
  32. GRB 240529A: J-band detections with WINTER
  33. GRB 240529A: Skynet Optical Observations
  34. GRB 240529A: Swift-BAT refined analysis
  35. GRB 240529A: Swift-XRT refined Analysis
  36. GRB240529A: BOOTES-6/DPRT optical detection
  37. GRB 240529A: Swift/UVOT Detection
  38. GRB 240529A: NOT optical observations
  39. GRB 240529A: AstroSat CZTI detection
  40. GRB 240529A: GOTO optical afterglow detection
  41. GRB 240527B: Swift-XRT afterglow detection
  42. GRB 240529A: Enhanced Swift-XRT position
  43. GRB 240529A: Swift detection of a burst with an optical counterpart
  44. GRB 240527B: Fermi GBM Observation
  45. Fermi GRB 240527A: Global MASTER-Net observations report
  46. GRB 240527B: Fermi-LAT detection
  47. Fermi GRB 240527B: Global MASTER-Net observations report
  48. GRB 240527B: Fermi GBM Final Localization
  49. GRB 240527B: BALROG localization (Fermi Trigger 738511436 / GRB 240527586)
  50. GRB 240527A: Fermi GBM Final Real-time Localization
  51. GRB 240523A: Swift-BAT refined analysis
  52. GRB 240523A: Swift-XRT refined Analysis
  53. GRB 240523A: Enhanced Swift-XRT position
  54. GRB 240523A: Swift detection of a burst
  55. GRB 240521B: Fermi GBM Observation
  56. Fermi GBM Sub-Threshold Detection of GRB 240516B
  57. GRB 240513A: Swift-XRT afterglow detection
  58. GRB 240521B: Swift/BAT-GUANO arcminute localization of a long burst
  59. GRB 240521A: GECAM-B detection of a long burst
  60. GRB 240516B: AstroSat CZTI detection
  61. LIGO/Virgo/KAGRA S240515m: Upper limits from Swift/BAT-GUANO
  62. LIGO/Virgo/KAGRA S240514x: Upper limits from Swift/BAT-GUANO
  63. LIGO/Virgo/KAGRA S240513ei: Upper limits from Swift/BAT-GUANO
  64. GRB 240514B: VZLUSAT-2 detection
  65. GRB 240504A: VZLUSAT-2 detection
  66. GRB 240502A: VZLUSAT-2 detection
  67. GRB 240519A: GRBAlpha detection
  68. GRB 240516A: Swift/UVOT Upper Limits
  69. GRB 240519A: AstroSat CZTI detection
  70. GRB 240519A: BALROG localization (Fermi Trigger 737788024 / GRB 240519213)
  71. GRB 240516A: Swift-BAT refined analysis
  72. Fermi GRB 240517A: Global MASTER-Net observations report
  73. GRB 240516A ATCA radio observations
  74. IPN triangulation of GRB 240514B (short)
  75. GRB 240513A: Swift ToO observations
  76. GRB 240517A: Fermi GBM Final Real-time Localization
  77. Konus-Wind detection of GRB 240513A
  78. GRB 240516A: AstroSat CZTI detection
  79. GRB 240516A: Swift-XRT refined Analysis
  80. GRB 240514E: A possible candidate BD-21 1074
  81. GRB 240516A: Fermi GBM Observation
  82. GRB 240511A: Observations from GTC/OSIRIS+
  83. GRB 240502C: Zeiss-1000 at Koshka observations of GOTO24bao optical counterpart candidate
  84. GRB 240516A: GOTO optical upper limit
  85. LIGO/Virgo/KAGRA S240422ed: GRID non-detection and upper limits
  86. GRB 240516A: Swift detection of a burst
  87. GRB 240514B: AT2024ixa/GOTO24bph is not consistent with the Fermi localisation
  88. GRB 240511A: radio detection of afterglow candidate
  89. GRB 240514B: GOTO candidate optical counterpart
  90. Fermi Gamma-ray Burst Monitor list of triggers that are not a GRB
  91. GRB 240514E: MAXI/GSC detection of a probable afterglow
  92. GRB 240514B: GRBAlpha detection
  93. GRB 240514B: Fermi GBM Detection
  94. GRB 240513A: Fermi GBM observation
  95. GRB 240513A: Swift-XRT observations
  96. GRB 240514D: AstroSat CZTI detection
  97. GRB 240514C: Fermi GBM Final Real-time Localization
  98. Fermi GRB 240514B: Global MASTER-Net observations report
  99. GRB 240514B: Fermi GBM Final Real-time Localization
  100. LIGO/Virgo/KAGRA S240507p: Upper limits from Swift/BAT-GUANO

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