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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"

11672 results found.

  1. GRB 231018A: BALROG localization (Fermi Trigger / GRB 231018521)
  2. GRB 231018A: Fermi GBM Final Real-time Localization
  3. GRB 231017A: Swift/BAT-GUANO candidate arcminute localization of a burst
  4. Fermi-LAT gamma-ray observations of IceCube-231014A
  5. GRB231017A: Fermi GBM Final Localization
  6. IceCube-231014A - IceCube observation of a high-energy neutrino candidate track-like event
  7. Correction in GCN 34814: GRB 231012B (not GRB 231012A)
  8. GRB 231012A: Fermi GBM Final Real-time Localization
  9. GRB 231012A: Fermi GBM Final Real-time Localization
  10. GRB 231004A: Glowbug gamma-ray detection
  11. GRB 231004A: CALET Gamma-Ray Burst Monitor detection
  12. Fermi-LAT gamma-ray observations of IceCube-231004A
  13. IceCube-231004A - IceCube observation of a high-energy neutrino candidate track-like event
  14. GRB 231004A: Fermi GBM Final Real-time Localization
  15. GRB 231003A is not a GRB
  16. GRB 231003A: Fermi GBM Final Real-time Localization
  17. GRB 230827B: 10.4m GTC spectroscopic redshift
  18. GRB 230930A: Fermi GBM Final Real-time Localization
  19. AT2023sva / GRB230916B: GIT observations of the afterglow
  20. transient AT2023sva: A Binary Driven Hypernova with a possible associated supernova
  21. Konus-Wind detection of GRB 230919A
  22. Fermi Gamma-ray Burst Monitor trigger 717299390/230925076 is not a GRB
  23. Fermi Gamma-ray Burst Monitor trigger 230925241/717313591 is not a GRB
  24. GRB 230812B: r'-band observations from MISTRAL at Observatoire de Haute-Provence
  25. GRB 230921A: Fermi GBM Final Real-time Localization
  26. GRB 230918B: VLT/X-shooter classification of AT 2023tbf (GOTO23aky) as a dwarf nova
  27. IPN triangulation of GRB 230919A (short)
  28. GRB 230919A: Fermi GBM Observation
  29. Correction to Fermi GBM Statement for Trigger 716527670/230916144
  30. Fermi GBM Statement for Trigger 716527670/230916144
  31. GRB 230919A: Swift/BAT-GUANO detection of a possibly short burst outside the coded FOV
  32. GRB 230812B : optical observations from MISTRAL at Observatoire de Haute-Provence
  33. GRB 230919A: AstroSat CZTI detection
  34. AT2023sva: redshift from OSIRIS+/GTC of the ZTF afterglow
  35. GRB 230918B: GOTO detection of a fast-rising transient in the GBM localisation region
  36. GRB 230919A: Fermi GBM Final Real-time Localization
  37. Detection of self-absorbed radio emission from GRB 230812B with the JVLA + uGMRT
  38. GRB 230918B: Fermi GBM Final Real-time Localization
  39. GRB 230918A (short): Glowbug gamma-ray detection
  40. GRB 230916B: Glowbug gamma-ray detection
  41. AT 2023sva: NOT observations of the ZTF candidate afterglow
  42. ZTF and SEDM Observations of the Candidate Optical Afterglow AT 2023sva
  43. GRB 230915A: Fermi GBM observation
  44. GRB 230812B: Radio observations with the uGMRT
  45. GRB 230918A: Fermi GBM Final Real-time Localization
  46. GRB 230911A: Fermi GBM Observation
  47. Fermi trigger No 716572242: Global MASTER-Net observations report
  48. Fermi trigger No 716544961: Global MASTER-Net observations report
  49. Fermi-LAT gamma-ray observations of IceCube-230914A
  50. GRB 230915A: Swift/BAT-GUANO detection of a burst
  51. GRB 230911D: GRBAlpha detection
  52. GRB 230906A: optical counterpart
  53. GRB 230911A: Swift-XRT afterglow detection
  54. Fermi trigger No 716449174: Global MASTER-Net observations report
  55. GRB 230913A: CALET Gamma-Ray Burst Monitor detection
  56. Fermi trigger No 716419312: Global MASTER-Net observations report
  57. GRB 230913A: Glowbug gamma-ray detection
  58. GRB 230812B: Bad Time Intervals for Fermi GBM data
  59. IceCube-230914A - IceCube observation of a high-energy neutrino candidate track-like event
  60. GRB 230913A: Fermi GBM Observation
  61. GRB 230911A: Swift ToO observations
  62. GRB 230913A: Swift/BAT-GUANO arcminute localization of a burst
  63. Fermi GRB 230913A: Global MASTER-Net observations report
  64. GRB 230911A: GOTO optical counterpart candidate
  65. GRB 230913A: Fermi GBM Final Real-time Localization
  66. GRB 230911D: NuSTAR Detection of Prompt Emission
  67. GRB 230911B: AstroSat CZTI detection
  68. GRB 230906A: Chandra detection of the X-ray afterglow
  69. GRB 230911D: Fermi GBM observation
  70. IPN triangulation of GRB 230911D (long)
  71. GRB 230911D: Fermi-LAT detection
  72. GRB 230911B: GRBAlpha and VZLUSAT-2 joint detection
  73. Fermi trigger No 716145795: Global MASTER-Net observations report
  74. Konus-Wind detection of GRB 230811D
  75. GRB 230911D: BALROG localization (Fermi Trigger 716111594/ GRB 230911329)
  76. GRB 230911D: Fermi GBM Final Localization
  77. Fermi GRB 230911B: Global MASTER-Net observations report
  78. GRB 230911B: Fermi GBM Final Real-time Localization
  79. GRB 230911A: Fermi GBM Final Real-time Localization
  80. GRB 230906A: BlackGEM upper limits
  81. GRB 230903A: TESS observations of optical emission
  82. GRB 230906A: AstroSat CZTI detection
  83. GRB 230910A: Fermi GBM Final Real-time Localization
  84. GRID detection of GRB 230827A
  85. GRB 230818A: radio observation with the VLA
  86. Konus-Wind detection of GRB 230906A (short)
  87. IPN triangulation of GRB 230906A (short)
  88. Fermi GRB 230906A: Global MASTER-Net observations report
  89. GRB 230906A: Fermi GBM Final Localizationn
  90. GRB 230905A: Fermi GBM Final Real-time Localization
  91. GRB 230903A: VLT/X-shooter optical observations
  92. GRB 230904C: Fermi GBM Final Localization
  93. Fermi trigger No 715552087: Global MASTER-Net observations report
  94. Fermi trigger No 715429986: Global MASTER-Net observations report
  95. Fermi GRB 230903A: Global MASTER-Net observations report
  96. GRB 230903A: Fermi GBM detection
  97. GRB 230904B is not a GRB
  98. GRB 230904B: BALROG localization (Fermi Trigger 715526984 / GRB 230904562)
  99. Fermi GRB 230904A: Global MASTER-Net observations report
  100. GRB 230904A: Fermi GBM Final Real-time Localization

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