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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"

24475 results found.

  1. LIGO/Virgo/KAGRA S241125n: Kinder optical upper limit in the BAT error region
  2. LIGO/Virgo/KAGRA S241125n: Updated Sky localization
  3. LIGO/Virgo/KAGRA S241125n: Updated Coincidence with External Event
  4. LIGO/Virgo/KAGRA S241125n: No counterpart candidates in INTEGRAL SPI-ACS prompt observation, comparisong with Swift/BAT counterpart
  5. LIGO/Virgo/KAGRA S241109bn: Upper limits from a two-week IceCube neutrino search
  6. LIGO/Virgo/KAGRA S241125n: Updated Sky localization and Coincidence with External Event
  7. LIGO/Virgo/KAGRA S241125n: Swift/BAT-GUANO candidate counterpart
  8. GRB 241120A: GRBAlpha detection
  9. GRB 241113B: SVOM/VT optical afterglow observations
  10. LIGO/Virgo/KAGRA S241125n: Identification of a GW compact binary merger candidate
  11. Konus-Wind detection of GRB 241117A
  12. LIGO/Virgo/KAGRA S241122a: Updated Sky localization and Source Classification
  13. LIGO/Virgo/KAGRA S241122a: Identification of a GW compact binary merger candidate
  14. IPN triangulation of GRB 241117A
  15. Konus-Wind detection of GRB 241120A
  16. GRB 241120A: CALET Gamma-Ray Burst Monitor detection
  17. EP241021a and EP241026b: Keck/LRIS spectroscopic observations
  18. EP trigger ID 01709065118: Keck/LRIS spectroscopic observations
  19. EP-WXT trigger 01709018832: Lick/Kast spectroscopy with the 3 m Shane telescope
  20. GRB 241120A: Mondy and AbAO optical observations
  21. EP241119a: Optical upper limits with Kinder observations
  22. GRB 241113A: Possible ATCA Radio detection
  23. EP241119a : J-band observations with WINTER
  24. GRB 241120A: Fermi GBM Observation
  25. Integral GRB241120.25: Global MASTER-Net observations report
  26. EP241119a: Global MASTER-Net observations report
  27. GRB241120A: a long GRB detected by INTEGRAL
  28. GRB 241120A: Fermi GBM Final Real-time Localization
  29. GRB 241115A: CALET Gamma-Ray Burst Monitor detection
  30. GRB 241112B: Mephisto further optical observations
  31. GRB 241119A: Fermi GBM Final Real-time Localization
  32. GRB 241117A: Swift/BAT-GUANO localization skymap of a burst
  33. LIGO/Virgo/KAGRA S241116cq: Upper limits from Swift/BAT-GUANO
  34. GRB 241115B: Fermi GBM Observation
  35. LIGO/Virgo/KAGRA S241114y: Updated Sky localization
  36. Fermi GRB 241118A: Global MASTER-Net observations report
  37. GRB 241118A: Fermi GBM Final Real-time Localization
  38. GRB 241117A: SVOM/GRM observation of a short burst with extended emission
  39. GRB 241117A: Fermi GBM Detection
  40. Fermi GRB 241117B: Global MASTER-Net observations report
  41. GRB 241117B: Fermi GBM Final Real-time Localization
  42. IceCube-Cascade 241116A: Upper limits from a search for additional neutrino events in IceCube
  43. LIGO/Virgo/KAGRA S241116cq: Updated Sky localization
  44. GRB 241115B: Swift/BAT-GUANO localization skymap of a long burst
  45. Fermi GRB 241117A: Global MASTER-Net observations report
  46. GRB 241117A: Fermi GBM Final Real-time Localization
  47. GRB 241115C: Fermi GBM Observation
  48. LIGO/Virgo/KAGRA S241116cq: Identification of a GW compact binary merger candidate
  49. EP241115a/GRB 241115D: Optical upper limits with Kinder observations
  50. GRB 241115A: Mephisto upper limits
  51. GRB 241113B: Mephisto upper limits
  52. EP241115a/GRB 241115D: Swift/XRT follow-up observation
  53. GRB 241115D / EP 241115a: SVOM/GRM observation
  54. GRB 241115A: Fermi GBM Observation
  55. GRB 241115A: LCOGT Optical Upper Limits
  56. GRB 241115C: Swift/BAT-GUANO localization skymap of a burst
  57. Fermi GRB 241115B: Global MASTER-Net observations report
  58. LIGO/Virgo/KAGRA S241114bi: Updated Sky localization and EM Bright Classification
  59. EP241115a: Global MASTER-Net observations report
  60. GRB 241115B: Fermi GBM Final Real-time Localization
  61. LIGO/Virgo/KAGRA S241113p: Updated Sky localization
  62. EP241113a: No Detection in Fermi-GBM Observations
  63. Swift GRB 241115A: Global MASTER-Net observations report
  64. Fermi GRB 241115A: Global MASTER-Net observations report
  65. GRB 241115A: Fermi GBM Final Real-time Localization
  66. EP 241113a: LBT possible optical counterpart
  67. LIGO/Virgo/KAGRA S241114bi: Upper limits from Fermi-GBM Observations
  68. LIGO/Virgo/KAGRA S241114bi: Coverage and upper limits from MAXI/GSC observations
  69. GRB 241113A: Swift-BAT refined analysis
  70. LIGO/Virgo/KAGRA S241114bi: Identification of a GW compact binary merger candidate
  71. Fermi GRB 241114A: Global MASTER-Net observations report
  72. EP241113a: Global MASTER-Net observations report
  73. GRB 241114A: Fermi GBM Final Real-time Localization
  74. IceCube-241113A: Upper limits from a search for additional neutrino events in IceCube
  75. GRB 241113A: 1.6m Mephisto and 50cm array optical upper limits
  76. EP241113b: Global MASTER-Net observations report
  77. EP241113b/GRB 241113B: EP detection of GRB 241113B
  78. Fermi-LAT gamma-ray observations of IceCube-241113A
  79. LIGO/Virgo/KAGRA S241114y: Identification of a GW compact binary merger candidate
  80. GRB 241113A: REM detection of the optical/NIR afterglow
  81. Konus-Wind detection of GRB 241107A (short/hard)
  82. LIGO/Virgo/KAGRA S241113p: Identification of a GW compact binary merger candidate
  83. IceCube-241113A - IceCube observation of a high-energy neutrino candidate track-like event
  84. GRB 241113B : detection of a long GRB by SVOM/ECLAIRs
  85. GRB 241113A: Swift detection of a burst with an optical counterpart
  86. Swift GRB241113.33: Global MASTER-Net observations report
  87. SVOM/GRM detection of a short burst from SGR 1E1841-045
  88. Fermi trigger No 753166198: Global MASTER-Net observations report
  89. LIGO/Virgo/KAGRA S241111bn: Updated Sky localization
  90. IceCube Alert 241113.02: Global MASTER-Net observations report
  91. Fermi GRB 241112A: Global MASTER-Net observations report
  92. Fermi-GBM Sub-Threshold Detection of GRB 241112B
  93. GRB 241112B: Optical afterglow detection confirmation in revisiting the Mephisto data
  94. GRB 241112B: Swift-XRT afterglow detection
  95. GRB 241112B: LCO optical detection of the SVOM/VT candidate
  96. GRB 241107A: Swift/BAT candidate arcminute localization of a short burst
  97. GRB 241112B: Mephisto optical upper limits
  98. GRB 241112B : detection of a long GRB by SVOM/ECLAIRs
  99. GRB 241107A: INTEGRAL IBIS localization
  100. GRB 241112A: Fermi GBM Final Real-time Localization

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