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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"

24509 results found.

  1. LIGO/Virgo/KAGRA S241114bi: Upper limits from Fermi-GBM Observations
  2. LIGO/Virgo/KAGRA S241114bi: Coverage and upper limits from MAXI/GSC observations
  3. GRB 241113A: Swift-BAT refined analysis
  4. LIGO/Virgo/KAGRA S241114bi: Identification of a GW compact binary merger candidate
  5. Fermi GRB 241114A: Global MASTER-Net observations report
  6. EP241113a: Global MASTER-Net observations report
  7. GRB 241114A: Fermi GBM Final Real-time Localization
  8. IceCube-241113A: Upper limits from a search for additional neutrino events in IceCube
  9. GRB 241113A: 1.6m Mephisto and 50cm array optical upper limits
  10. EP241113b: Global MASTER-Net observations report
  11. EP241113b/GRB 241113B: EP detection of GRB 241113B
  12. Fermi-LAT gamma-ray observations of IceCube-241113A
  13. LIGO/Virgo/KAGRA S241114y: Identification of a GW compact binary merger candidate
  14. GRB 241113A: REM detection of the optical/NIR afterglow
  15. Konus-Wind detection of GRB 241107A (short/hard)
  16. LIGO/Virgo/KAGRA S241113p: Identification of a GW compact binary merger candidate
  17. IceCube-241113A - IceCube observation of a high-energy neutrino candidate track-like event
  18. GRB 241113B : detection of a long GRB by SVOM/ECLAIRs
  19. GRB 241113A: Swift detection of a burst with an optical counterpart
  20. Swift GRB241113.33: Global MASTER-Net observations report
  21. SVOM/GRM detection of a short burst from SGR 1E1841-045
  22. Fermi trigger No 753166198: Global MASTER-Net observations report
  23. LIGO/Virgo/KAGRA S241111bn: Updated Sky localization
  24. IceCube Alert 241113.02: Global MASTER-Net observations report
  25. Fermi GRB 241112A: Global MASTER-Net observations report
  26. Fermi-GBM Sub-Threshold Detection of GRB 241112B
  27. GRB 241112B: Optical afterglow detection confirmation in revisiting the Mephisto data
  28. GRB 241112B: Swift-XRT afterglow detection
  29. GRB 241112B: LCO optical detection of the SVOM/VT candidate
  30. GRB 241107A: Swift/BAT candidate arcminute localization of a short burst
  31. GRB 241112B: Mephisto optical upper limits
  32. GRB 241112B : detection of a long GRB by SVOM/ECLAIRs
  33. GRB 241107A: INTEGRAL IBIS localization
  34. GRB 241112A: Fermi GBM Final Real-time Localization
  35. LIGO/Virgo/KAGRA S241110br: NED Galaxies in the Localization Volume
  36. LIGO/Virgo/KAGRA S241109bn: ATLAS observations and discovery of the potential counterpart AT2024aawt
  37. LIGO/Virgo/KAGRA S241111bn: Identification of a GW compact binary merger candidate
  38. IPN triangulation of GRB 241107A (short/hard)
  39. GRB 241025C: VZLUSAT-2 detection
  40. GRB 241025A: VZLUSAT-2 detection
  41. GRB 241018A: cubesat Avion detection
  42. Fermi trigger No 752990530: Global MASTER-Net observations report
  43. GRB 241111A: Fermi GBM Final Real-time Localization
  44. GRB 241030B: TESS detection of optical counterpart
  45. LIGO/Virgo/KAGRA S241110br: Updated Sky localization
  46. LIGO/Virgo/KAGRA S241110bk: 1 counterpart neutrino candidate event from an IceCube neutrino search
  47. LIGO/Virgo/KAGRA S241110br: Identification of a GW compact binary merger candidate
  48. LIGO/Virgo/KAGRA S241109bn: Upper limits from EP-WXT observations
  49. Fermi trigger No 752878030: Global MASTER-Net observations report
  50. Integral GRB241109.89: Global MASTER-Net observations report
  51. LIGO/Virgo/KAGRA S241109bn: Coverage and upper limits from MAXI/GSC observations
  52. EP241109a: KAIT photometry and 3 m Shane spectroscopy from Lick observatory
  53. LIGO/Virgo/KAGRA S241109bn: Updated Sky localization and EM Bright Classification
  54. LIGO/Virgo/KAGRA S241109bn: Upper limits from Fermi-GBM Observations
  55. LIGO/Virgo/KAGRA S241109p: Updated Sky localization and Source Classification
  56. LIGO/Virgo/KAGRA S241109bn: Global MASTER-Net observations report
  57. LIGO/Virgo/KAGRA S241109bn: Identification of a GW compact binary merger candidate
  58. EP241109a: confirmation of a stellar flare by BOOTES-7
  59. GRB 241108A: Swift-XRT observations
  60. LIGO/Virgo/KAGRA S241109p: Identification of a GW compact binary merger candidate
  61. EP241107a: KAIT optical observations
  62. GRB 241030A: TESS observations
  63. GRB 241108A : a likely weak long GRB detected by SVOM/ECLAIRs
  64. GRB 241104A: CALET Gamma-Ray Burst Monitor detection
  65. EP241107a: AKO Optical Afterglow Follow-Up Observations
  66. GRB 241107A: SVOM/GRM detection of a short burst
  67. GRB 241105A: SVOM/GRM observation
  68. EP241107a: Global MASTER-Net observations report
  69. EP241107a: SVOM/C-GFT optical observations
  70. GRB241105A: Gemini-South Optical Afterglow Detection
  71. EP241101a: CrAO ZTSH optical observations
  72. GRB 241105A: Swift/BAT-GUANO refined analysis of short burst with extended emission
  73. GRB 241105A: Fermi GBM Observation of a Short Burst with Extended Emission
  74. Konus-Wind detection of GRB 241105A (short with extended emission)
  75. LIGO/Virgo/KAGRA S241106ba: 1 counterpart neutrino candidate event from an IceCube neutrino search
  76. LIGO/Virgo/KAGRA S241102o: 1 counterpart neutrino candidate event from an IceCube neutrino search
  77. Konus-Wind detection of GRB 241021A
  78. GRB 241105A: VLT/FORS2 spectroscopic redshift z = 2.681
  79. GRB 241104A: Fermi GBM Observation
  80. GRB 241105A: Swift/BAT-GUANO arcminute localization of a short burst
  81. GRB 241105A: GOTO tentative optical counterpart candidate
  82. Fermi GRB 241105A: Global MASTER-Net observations report
  83. GRB 241104A: SVOM/VT optical candidate
  84. GRB 241105A: Fermi GBM Final Real-time Localization
  85. GRB 241104A/EP241104a: Optical upper limits with Kinder observations
  86. GRB 241104A: COLIBRÍ Upper Limits on the Optical Counterpart
  87. GRB 241104A: SVOM/GRM observation
  88. EP241104a: EP detection of GRB 241104A X-ray emission
  89. EP241101a NUTTelA-TAO / BSTI Measurements 2024-11-02
  90. GRB 241104A : Detection and localization by SVOM/ECLAIRs
  91. Fermi GRB 241104A: Global MASTER-Net observations report
  92. GRB 241104A: Fermi GBM Final Real-time Localization
  93. GRB 241030A: GRBAlpha detection
  94. EP241101a: EP-FXT observations update
  95. Fermi trigger No 752365806: Global MASTER-Net observations report
  96. LIGO/Virgo/KAGRA S241102cy: Updated Sky localization
  97. LIGO/Virgo/KAGRA S241102br: Updated Sky localization
  98. EP241101a: Possible detection of an optical counterpart with FTW
  99. EP241101a: Optical upper limits with Kinder observations
  100. LIGO/Virgo/KAGRA S241102br: MASTER observations and OT detection

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