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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"

38438 results found.

  1. SVOM GRB260516D: Global MASTER-Net observations report
  2. GRB 260516D: SVOM possible detection of a burst
  3. GRB 260516C: Fermi GBM Final Real-time Localization
  4. Konus-Wind detection of GRB 260515A
  5. GRB 260515A: Liverpool Telescope optical detection
  6. GRB 260515A: LCO optical counterpart detection
  7. Fermi Gamma-ray Burst Monitor trigger 800627191/260516518 is not a GRB
  8. GRB 260515A: SVOM/COLIBRÍ (FM-GFT) optical observations
  9. GRB 260515A: EP-FXT follow-up observation
  10. EP260514a: refined analysis of the EP-WXT and follow-up EP-FXT observations
  11. EP260514a: TRT optical counterpart candidate
  12. EP260514a: SVOM/VT optical candidate
  13. GRB 260516B: Fermi GBM Final Real-time Localization
  14. Fermi Gamma-ray Burst Monitor trigger 800592653/260516119 is not a GRB
  15. GRB 260515A: SVOM/VT optical observations
  16. GRB 260515A: OHP/T193 optical observations
  17. EP260514a: COLIBRÍ optical upper limits
  18. GRB 260516A: Fermi GBM Final Real-time Localization
  19. GRID detection of GRB 260507A
  20. GRB 260515A: GTC/OSIRIS+ spectroscopic redshift z = 0.764
  21. GRB 260515A: LCO optical observations
  22. SVOM GRB 260515A: Global MASTER-Net observations report
  23. GRB 260515A: NOT optical observations.
  24. SVOM GRB 260515A: MASTER OT J151044.43+243321.7 optical counterpart detection
  25. GRB 260515A: SVOM/VT optical candidate from VHF data
  26. GRB 260515A: JinShan optical counterpart candidate
  27. GRB 260515A: SVOM detection of a burst
  28. GRB 260510C: Glowbug gamma-ray detection
  29. IceCube-260504A: No Candidate Transients from the Zwicky Transient Facility
  30. EP260514a: GROWTH-India Telescope optical upper limit
  31. GRB 260511B: NOT optical observations
  32. Konus-Wind detection of GRB 260512A
  33. GRB 260510C: CALET Gamma-Ray Burst Monitor detection
  34. GRB 260511B: GMG Optical Upper Limit
  35. EP260514a: Einstein Probe detection of a fast X-ray transient
  36. EP260512a: LCO optical upper limits
  37. IPN triangulation of GRB 260512A
  38. GRB 260511B: Mephisto multi-band optical followup
  39. GRB 260512A: AstroSat CZTI detection
  40. The EP-WXT trigger 01709262077 is likely a flaring star
  41. EP260512a: EP-FXT follow-up observation
  42. GRB 260514A: Fermi GBM Final Real-time Localization
  43. GRB 260511B: further SAO RAS optical observations
  44. GRB 260513A: Fermi GBM Final Real-time Localization
  45. GRB 260509A: SVOM/VT optical observations
  46. Konus-Wind detection of GRB 260511B
  47. The EP-WXT trigger 01709262036 is likely a flaring star
  48. EP260512a: COLIBRÍ optical upper limits
  49. EP260512a: Einstein Probe detection of an X-ray transient
  50. GRB 260511B: further J-band observations by the SYSU 80 cm infrared telescope
  51. GRB 260511B: Calapai Observatory, Massa S. Giorgio (Messina), optical observation.
  52. GRB 260512A: NuSTAR detection of prompt emission
  53. GRB 260509A: Infrared J and Hs observations with MDM/MIRAGE
  54. GRB 260510C: Infrared J and Hs detections with MDM/MIRAGE
  55. EP260507a: Infrared J and Hs upper limits with MDM/MIRAGE
  56. GRB 260512A: Fermi GBM Final Real-time Localization
  57. GRB 260511A: Glowbug gamma-ray detection
  58. Konus-Wind detection of GRB 260511A
  59. MASS-Cube (GRID 2.0) detection of GRB 260511A
  60. MASS-Cube (GRID 2.0) detection of GRB 260507A
  61. GRB 260511B: SAO RAS optical observations
  62. GRB 260510D: Glowbug gamma-ray detection of a likely short burst
  63. GRB 260511B: FRAM-ORM optical detection
  64. GRB 260511A: EP-FXT follow-up observation
  65. GRB 260511B: EP-FXT follow-up observation
  66. GRB 260511B: LCO optical counterpart detection
  67. GRB260511B: MAO/AZT-22 optical observations
  68. GRB 260511A: SVOM/VT optical observations
  69. GRB 260511B: LCO optical observations
  70. GRB 260511B: OHP/T193 spectroscopic observations
  71. GRB 260511B: GOTO optical counterpart detection
  72. GRB 260511B: Xinglong 2.16m/BEFOSC redshift confirmation
  73. GRB 260510C: SVOM/COLIBRÍ (FM-GFT) further optical observations
  74. GRB 260511B: SVOM/VT optical observations
  75. GRB 260511B: SVOM/COLIBRÍ (FM-GFT) optical observations
  76. GRB 260510B: EP-FXT follow-up observation
  77. GRB 260511B: OSIRIS+/GTC redshift z=2.006
  78. GRB 260510C: Fermi GBM Observation
  79. GRB 260509A: SAO RAS optical observations
  80. GRB 260511A: REM near-infrared detection
  81. GRB 260511B: GROWTH-India Telescope optical observations
  82. GRB 260511B: AstroSat CZTI detection
  83. GRB 260506B: Glowbug gamma-ray detection
  84. GRB 260506A: Glowbug gamma-ray detection of a short burst
  85. GRB 260511B: J-band observations by the SYSU 80 cm infrared telescope
  86. GRB 260511B: NuSTAR detection of prompt emission
  87. GRB 260511A: NuSTAR detection of prompt emission
  88. GRB 260511B: Fermi GBM Detection
  89. GRB 260511C: Fermi GBM Final Real-time Localization
  90. GRB 260511B: SVOM/VT optical observation with VHF data
  91. GRB 260511B: TRT optical observation
  92. GRB 260510B: SVOM/ECLAIRs refined analysis
  93. GRB 260511B : MITSuME Akeno optical afterglow candidate detection
  94. GRB 260511A: Fermi GBM Detection
  95. GRB 260511B SVOM/C-GFT optical counterpart detection
  96. EP260509a: LCO optical upper limits
  97. GRB 260511A: UTGO H50 optical afterglow observation
  98. GRB 260510C: AstroSat CZTI detection
  99. GRB 260511B: SVOM detection of a burst
  100. GRB 260511B: Fermi GBM Final Real-time Localization

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