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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"

28114 results found.

  1. EP260512a: EP-FXT follow-up observation
  2. EP260507a: Xinglong Schmidt optical counterpart detection
  3. EP260512a: Global MASTER-Net observations report
  4. Fermi GRB 260513A: Global MASTER-Net observations report
  5. Fermi GRB 260512A: Global MASTER-Net observations report
  6. GRB 260511B: further SAO RAS optical observations
  7. GRB 260509A: SVOM/VT optical observations
  8. The EP-WXT trigger 01709262036 is likely a flaring star
  9. EP260512a: COLIBRÍ optical upper limits
  10. EP260512a: Einstein Probe detection of an X-ray transient
  11. GRB 260511B: further J-band observations by the SYSU 80 cm infrared telescope
  12. GRB 260511B: Calapai Observatory, Massa S. Giorgio (Messina), optical observation.
  13. GRB 260512A: NuSTAR detection of prompt emission
  14. GRB 260509A: Infrared J and Hs observations with MDM/MIRAGE
  15. GRB 260510C: Infrared J and Hs detections with MDM/MIRAGE
  16. EP260507a: Infrared J and Hs upper limits with MDM/MIRAGE
  17. GRB 260511A: Glowbug gamma-ray detection
  18. GRB 260511B: SAO RAS optical observations
  19. GRB 260510D: Glowbug gamma-ray detection of a likely short burst
  20. GRB 260511B: FRAM-ORM optical detection
  21. GRB 260511A: EP-FXT follow-up observation
  22. GRB 260511B: EP-FXT follow-up observation
  23. GRB 260511B: LCO optical counterpart detection
  24. GRB260511B: MAO/AZT-22 optical observations
  25. GRB 260511B: LCO optical observations
  26. GRB 260510C: SVOM/COLIBRÍ (FM-GFT) further optical observations
  27. GRB 260511B: SVOM/COLIBRÍ (FM-GFT) optical observations
  28. GRB 260510B: EP-FXT follow-up observation
  29. GRB 260510C: Fermi GBM Observation
  30. GRB 260509A: SAO RAS optical observations
  31. GRB 260511A: REM near-infrared detection
  32. GRB 260511B: GROWTH-India Telescope optical observations
  33. GRB 260506B: Glowbug gamma-ray detection
  34. GRB 260506A: Glowbug gamma-ray detection of a short burst
  35. GRB 260511B: J-band observations by the SYSU 80 cm infrared telescope
  36. GRB 260511B: NuSTAR detection of prompt emission
  37. GRB 260511A: NuSTAR detection of prompt emission
  38. GRB 260511B: Fermi GBM Detection
  39. GRB 260511B: SVOM/VT optical observation with VHF data
  40. GRB 260511B: TRT optical observation
  41. GRB 260511B : MITSuME Akeno optical afterglow candidate detection
  42. GRB 260511A: Fermi GBM Detection
  43. GRB 260511B SVOM/C-GFT optical counterpart detection
  44. EP260509a: LCO optical upper limits
  45. GRB 260511A: UTGO H50 optical afterglow observation
  46. GRB 260511B: SVOM detection of a burst
  47. GRB 260510C: EP-FXT follow-up observation
  48. EP260509a: EP-FXT non-detection and upper limit
  49. GRB 260511A: SVOM/VT optical observation with VHF data
  50. Fermi GRB 260511A: Global MASTER-Net observations report
  51. GRB 260511A: KAIT optical afterglow observations
  52. GRB 260511A: LCO optical afterglow detection
  53. GRB 260511A: SVOM/COLIBRÍ (FM-GFT) optical counterpart
  54. GRB 260511A: TRT optical counterpart detection
  55. GRB 260511A: SVOM detection of a bright burst
  56. GRB 260511A: BALROG localization (Fermi Trigger 800172815 / GRB 260511259)
  57. GRB 260510C: SVOM/COLIBRÍ (FM-GFT) optical counterpart candidate
  58. GRB 260510C: MAXI/GSC detection
  59. EP260509a: Global MASTER-Net observations report
  60. Fermi GBM Sub-Threshold Detection of GRB 260510B
  61. GRB 260510C: SVOM detection of a burst
  62. GRB 260510B: LCO optical upper limits
  63. EP260509a: Einstein Probe detection of an X-ray transient
  64. GRB 260509A: Liverpool Telescope optical observations
  65. GRB 260510B: SVOM detection of a burst
  66. GRB 260509A: LCO optical observations
  67. SVOM GRB 260509A: MASTER-OAFA optical observation
  68. Fermi GRB 260510A: Global MASTER-Net observations report
  69. GRB 260509A: KAIT optical observations
  70. GRB 260509A: SVOM/COLIBRÍ (FM-GFT) observations
  71. GRB 260509A: SVOM/VT optical candidate with VHF data
  72. GRB 260509A: LCO optical counterpart detection
  73. GRB 260509A: SVOM detection of a burst
  74. IceCube-260504A: Upper limits from a search for additional neutrino events in IceCube
  75. EP260507a: REM optical/NIR observations
  76. EP260507a: refined analysis of the EP-WXT and EP-FXT observations
  77. GRB 260507B / EP260507a: Fermi-GBM Sub-Threshold Detection
  78. EP260507a: COLIBRÍ optical observations
  79. EP260507a: NOT optical observations
  80. EP260507a: further Liverpool Telescope observations
  81. EP260507a: Liverpool Telescope optical upper limits
  82. EP260507a: TRT optical counterpart detection
  83. EP260507a: Kinder optical counterpart candidate
  84. EP260507a: LCO optical counterpart
  85. EP260507a: Einstein Probe detection of an X-ray transient
  86. GRB 260506B: BALROG localization (Fermi Trigger 799765648 / GRB 260506547)
  87. Fermi GRB 260506A: Global MASTER-Net observations report
  88. IceCube Alert 260505A: Global MASTER-Net observations report
  89. GRB 260430B: Glowbug gamma-ray detection
  90. GRB 260421B: radio observation with the VLA
  91. Fermi-LAT Gamma-ray Observations of IceCube-260504A
  92. GRB 260430B: AstroSat CZTI detection of a long burst
  93. GRB 260502A: SVOM/GRM observation of a short GRB
  94. GRB 260503A: SVOM/GRM observation of a GRB
  95. Konus-Wind detection of GRB 260411C
  96. GRB 260504B: REM optical/NIR observations
  97. GRB 260504B: LCO z-band upper limit
  98. SVOM GRB 260504B: MASTER-OAFA optical observations
  99. GRB 260504B: SVOM detection of a short burst
  100. Fermi GRB 260504A: Global MASTER-Net observations report

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