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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.

Advanced Search Examples (click to copy):

subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

15396 results found.

  1. GRB 190323A: Insight-HXMT/HE detection
  2. Further Chandra observations of GW170817 ~581-583 days since merger
  3. GRB 190324A: VLT/X-shooter redshift
  4. GRB 190321A: Insight-HXMT/HE detection
  5. GRB 190114C: photometric detection of a SN component
  6. GRB 190320A: Fermi GBM observation
  7. GRB 190315A: AstroSat CZTI detection
  8. GRB 190311A: Swift/UVOT Detection
  9. GRB 190311A: NOT optical counterpart
  10. GRB190311A: OAO observations
  11. GRB 190311A: Mondy optical observations
  12. [Hxmt-ba]GRB 190310A: Insight-HXMT/HE detection
  13. GRB 190311A: Fermi GBM observation
  14. GRB 190305A: Swift-XRT afterglow detection
  15. Konus-Wind observation of GRB 190304A
  16. GRB 190306B: Insight-HXMT/HE detection
  17. Konus-Wind observation of GRB 190305A
  18. GRB 190306A: Tiled Swift observations
  19. GRB 190305A: Insight-HXMT/HE detection
  20. GRB 190305A: MAXI/GSC detection
  21. GRB 190305A: Tiled Swift observations
  22. GRB 190305A: AGILE/MCAL detection of a burst
  23. GRB 190226A: Insight-HXMT/HE detection
  24. INTEGRAL observation of IceCube-190221A
  25. IceCube-190221A: Swift-XRT Follow-up Observations
  26. IceCube-190221A: Fermi-LAT Gamma-ray observations
  27. GRB 190220B: Fermi GBM observation
  28. IceCube-190221A - IceCube observation of a high-energy neutrino candidate event
  29. GRB 190220B: BOOTES-4 optical observation
  30. GRB 190220B: a long GRB detected by IBAS
  31. GRB 190215A: AstroSat CZTI detection
  32. Trigger 889483: Swift detection of Swift J1858.6-0814
  33. GRB 190215A: Insight-HXMT/HE detection
  34. GRB 190215A: Fermi GBM detection
  35. GRB 190212A: Insight-HXMT/HE detection
  36. GRB 190206A: AstroSat CZTI detection
  37. GRB 190211A: NOT optical observations
  38. GRB 180703A: VLT/MUSE host galaxy redshift measurement
  39. GRB 190211A: BOOTES-4/MET optical afterglow confirmation
  40. GRB 190211A: NEXT-0.6m optical afterglow detection
  41. Trigger 888312: Swift detection of 4U 1901+03
  42. Konus-Wind observation of GRB 190206A
  43. Retraction of IceCube GCN/AMON NOTICE 36142391_132143
  44. GRB 190202A: AstroSat CZTI detection
  45. GRB 190202A: Xinglong-2.16m optical observations
  46. Konus-Wind observation of GRB 190204A
  47. GRB 190203A: AstroSat CZTI detection
  48. GRB190203A: UVOT analysis
  49. Konus-Wind observation of GRB 190203A
  50. GRB 190204A: AstroSat CZTI detection
  51. GRB 190203A: SAO RAS optical observations, afterglow fading
  52. GRB 190202A: AGILE ratemeters detection
  53. GRB 190202A: GOTO optical observations
  54. GRB 190202A: Koshka Zeiss-1000 optical observations
  55. GRB 190131A: Insight-HXMT/HE detection
  56. GRB 190131A: AstroSat CZTI detection
  57. GRB 190126A: AstroSat CZTI detection
  58. GRB 190129B: Insight-HXMT/HE detection
  59. GRB 190129B: GOTO optical observations
  60. GRB 190129B: DDOTI Detection of the Possible Afterglow and Suggestion of Fading
  61. GRB 190129B: ePESSTO NTT optical observations
  62. GRB 190129B: AstroSat CZTI detection
  63. GRB 190129B: GROND possible host candidate
  64. GRB 190129B: Tiled Swift observations
  65. GRB 190129A: Fermi GBM detection
  66. Konus-Wind observation of extremely bright GRB 190129B
  67. INTEGRAL observation of IceCube-190124A
  68. GRB 190114C: Optical follow-up from HCT
  69. Swift Trigger 885960: A third Swift trigger on MAXI J1348-630
  70. Search for counterpart to IceCube-190124A with ANTARES
  71. GRB 190117A: AstroSat CZTI detection
  72. GRB 190122B: AstroSat CZTI detection
  73. Fermi-LAT Gamma-ray Observations of IceCube-190124A
  74. GRB 190123A: IKI-GRB-FuN optical upper limit
  75. IceCube-190124A - IceCube observation of a high-energy neutrino candidate event
  76. Konus-Wind observation of GRB 190122A
  77. Konus-Wind of observation of GRB 190117A
  78. GRB 190123A: COATLI Optical Observations
  79. GRB 190123A: Fermi GBM observation
  80. GRB 190122A: Fermi-LAT detection
  81. GRB 190117A: Insight-HXMT/HE detection
  82. GRB 190114C: UKIRT JHK observation (CORRECTIONS)
  83. GRB 190114C: UKIRT JHK observation continuation - steady fading?
  84. GRB 190114C: Sardinia Radio Telescope observations (CORRECTION)
  85. GRB 190114C: REM optical/NIR detection (CORRECTION)
  86. GRB 190117A: AGILE/MCAL detection of a burst
  87. GRB 190114C: RATIR Optical and NIR Detections
  88. GRB 190114C: Continued UKIRT JHK observation
  89. GRB 190114C: UKIRT JHK observation
  90. Konus-Wind observation of GRB 190114C
  91. The Swift-XRT WT mode spectrum of GRB190114C
  92. GRB190114C, Long follow up urged
  93. GRB 190114C: Swift/UVOT Detection
  94. GRB 190114A: Swift/UVOT Observations
  95. GRB 190114C:Insight-HXMT/HE detection
  96. GRB 190114C: A type 1 BdHN with TeV emission
  97. GRB 190114C: AGILE/MCAL detection
  98. GRB 190114C: X-shooter observations of a highly extinguished afterglow
  99. GRB 190114C: Fermi-LAT detection
  100. GRB 190114C: refined redshift by the 10.4m GTC

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