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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"

37680 results found.

  1. Fermi-GBM Sub-Threshold Detection of GRB 241128A
  2. GRB 241113B : RAPAS follow-up observation
  3. Konus-Wind detection of GRB 241130A
  4. IPN triangulation of GRB 241130A
  5. GRB 241130A: EIRSAT-1 GMOD Detection
  6. GRB 241128A: Swift/UVOT Upper Limits
  7. GRB 241130A: Fermi GBM Detection
  8. GRB 241129A: Swift/BAT-GUANO localization skymap of a burst
  9. LIGO/Virgo/KAGRA S241102br: GRAWITA wide-field optical observations
  10. GRB 241127B: detection of a long GRB by SVOM/ECLAIRs
  11. GRB241201B: Fermi GBM Final Localization
  12. GRB241201B: Fermi GBM Final Localization
  13. Fermi GRB 241201A: Global MASTER-Net observations report
  14. GRB 241201A: BALROG localization (Fermi Trigger 754757764 / GRB 241201622)
  15. GRB 241130A: Fermi GBM Final Real-time Localization
  16. GRB 241130A: Fermi GBM Final Real-time Localization
  17. GRB 241201A: Fermi GBM Final Real-time Localization
  18. Fermi trigger No 754701230: Global MASTER-Net observations report
  19. IPN triangulation of GRB 241128B
  20. Konus-Wind detection of GRB 241114B
  21. GRB 241128A: AbAO optical upper limit
  22. SVOM/GRM observation of a short burst from soft gamma repeater Kes 73
  23. GRB 241128C: SVOM/GRM observation
  24. GRB 241128B: SVOM/GRM observation
  25. GRB 241128A: Swift-BAT refined analysis
  26. GRB 241127A: Swift-BAT refined analysis
  27. GRB 241127A: PRIME near-infrared detection
  28. GRB 241128A: Mondy optical observations
  29. GRB 241128A: GRANDMA and Kilonova-Catcher Optical Afterglow Detections and Upperlimits
  30. Swift GRB 241128A: Global MASTER-Net observations report
  31. Fermi-LAT gamma-ray observations of IceCube-241127A
  32. GRB 241128A: Swift-XRT refined Analysis
  33. GRB 241129A: Fermi GBM Final Real-time Localization
  34. GRB 241128A: Enhanced Swift-XRT position
  35. GRB 241128A: NOT optical observations
  36. GRB 241128A: LCO optical detection
  37. GRB 241128A: 1.5m OSN optical afterglow detection
  38. Fermi trigger No 754492985: Global MASTER-Net observations report
  39. GRB 241128A: Swift-XRT afterglow detection
  40. GRB 241128A: Swift detection of a burst
  41. GRB 241127A: GRANDMA and Kilonova-Catcher optical afterglow detections
  42. GRB 241127A: Swift/UVOT Detection
  43. GRB 241127A: Swift-XRT refined Analysis
  44. GRB 241127A: SVOM/GRM observation
  45. GRB 241127A: Enhanced Swift-XRT position
  46. GRB 241127A: LCOGT (40-cm) optical counterpart detection
  47. GRB 241127A: Swift detection of a burst with an optical counterpart
  48. LIGO/Virgo/KAGRA S241125n: Preliminary flux estimate and spectral analysis of the Swift/BAT-GUANO candidate counterpart
  49. IceCube-241127A: IceCube observation of a high-energy neutrino candidate track-like event
  50. SVOM/GRM observation of GRB 241126B or a short burst from magnetar
  51. GRB 241126A: SVOM/GRM observation
  52. IPN triangulation of GRB 241114B
  53. GRB 241113B: EP-FXT afterglow detection
  54. Konus-Wind detection of GRB 241115D / EP 241115a
  55. LIGO/Virgo/KAGRA S241125n: Upper limits from Konus-Wind observations
  56. GRB 241026A: radio detection with the VLA
  57. LIGO/Virgo/KAGRA S241125n: Upper limits from Fermi-GBM Observations
  58. LIGO/Virgo/KAGRA S241125n: Updated Coincidence with External Event
  59. LIGO/Virgo/KAGRA S241125n: No counterpart candidates in INTEGRAL SPI-ACS prompt observation, comparisong with Swift/BAT counterpart
  60. LIGO/Virgo/KAGRA S241125n: Updated Sky localization and Coincidence with External Event
  61. LIGO/Virgo/KAGRA S241125n: Swift/BAT-GUANO candidate counterpart
  62. GRB 241120A: GRBAlpha detection
  63. GRB 241113B: SVOM/VT optical afterglow observations
  64. Konus-Wind detection of GRB 241117A
  65. GRB 241105A: ATCA radio detection
  66. IPN triangulation of GRB 241117A
  67. GRB 241026A: VIRT Optical Upper Limit
  68. GRB 241025A: VIRT Optical Upper Limit
  69. Konus-Wind detection of GRB 241120A
  70. GRB241120A: OHP/T193 optical observations
  71. GRB 241120A: CALET Gamma-Ray Burst Monitor detection
  72. EP241021a and EP241026b: Keck/LRIS spectroscopic observations
  73. EP trigger ID 01709065118: Keck/LRIS spectroscopic observations
  74. EP-WXT trigger 01709018832: Lick/Kast spectroscopy with the 3 m Shane telescope
  75. GRB 241120A: Mondy and AbAO optical observations
  76. GRB 241113A: Possible ATCA Radio detection
  77. GRB 241120A: Fermi GBM Observation
  78. GRB 241114B: Insight-HXMT/HE detection
  79. GRB241120A: a long GRB detected by INTEGRAL
  80. GRB 241120A: Fermi GBM Final Real-time Localization
  81. GRB 241115A: CALET Gamma-Ray Burst Monitor detection
  82. GRB 241112B: Mephisto further optical observations
  83. GRB 241119A: Fermi GBM Final Real-time Localization
  84. GRB 241030A: J-band observations
  85. GRB 241115a: PRIME near-infrared upper limits
  86. GRB 241117A: Swift/BAT-GUANO localization skymap of a burst
  87. LIGO/Virgo/KAGRA S241116cq: Upper limits from Swift/BAT-GUANO
  88. GRB 241115B: Fermi GBM Observation
  89. Fermi GRB 241118A: Global MASTER-Net observations report
  90. GRB 241118A: Fermi GBM Final Real-time Localization
  91. GRB 241117A: SVOM/GRM observation of a short burst with extended emission
  92. GRB 241117A: Fermi GBM Detection
  93. Fermi GRB 241117B: Global MASTER-Net observations report
  94. GRB 241117B: Fermi GBM Final Real-time Localization
  95. GRB 241115B: Swift/BAT-GUANO localization skymap of a long burst
  96. Fermi GRB 241117A: Global MASTER-Net observations report
  97. GRB 241117A: Fermi GBM Final Real-time Localization
  98. GRB 241115C: Fermi GBM Observation
  99. GRB 241115A: Swift-XRT afterglow detection
  100. EP241115a/GRB 241115D: Optical upper limits with Kinder observations

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