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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"

32577 results found.

  1. GRB 260516D: SVOM/ECLAIRs refined analysis
  2. GRB 260515A: SVOM/ECLAIRs refined analysis
  3. GRB 260421B: radio detection with the VLA
  4. GRID detection of GRB 260511A
  5. GRB 260509A: CrAO ZTSh optical upper limit (Duplicate Submission)
  6. GRB 260509A: CrAO ZTSh optical upper limit
  7. GRB 260516D: EP-FXT follow-up observation
  8. GRB 260516D: GOTO optical counterpart detection
  9. GRB 260516D: LCO optical observations
  10. GRB 260515A: further Liverpool Telescope observations
  11. GRB 260516D: SVOM/COLIBRÍ (FM-GFT) optical observations
  12. GRB 260516D: GTC/OSIRIS+ spectroscopic redshift z = 1.801
  13. GRB 260516D: GROWTH-India Telescope optical detection
  14. GRB 260516D: SVOM/VT optical bright candidate
  15. GRB 260515A: CrAO ZTSh BVRI optical observations
  16. Fermi GRB 260516C: Global MASTER-Net observations report
  17. Konus-Wind detection of GRB 260515A
  18. GRB 260515A: Liverpool Telescope optical detection
  19. GRB 260515A: LCO optical counterpart detection
  20. GRB 260515A: SVOM/COLIBRÍ (FM-GFT) optical observations
  21. GRB 260515A: EP-FXT follow-up observation
  22. EP260514a: refined analysis of the EP-WXT and follow-up EP-FXT observations
  23. EP260514a: NOT optical counterpart confirmation
  24. EP260514a: TRT optical counterpart candidate
  25. EP260514a: SVOM/VT optical candidate
  26. Fermi GRB 260516B: Global MASTER-Net observations report
  27. GRB 260515A: SVOM/VT optical observations
  28. GRB 260515A: OHP/T193 optical observations
  29. EP260514a: COLIBRÍ optical upper limits
  30. GRID detection of GRB 260507A
  31. GRB 260515A: GTC/OSIRIS+ spectroscopic redshift z = 0.764
  32. GRB 260515A: LCO optical observations
  33. SVOM GRB 260515A: Global MASTER-Net observations report
  34. GRB 260515A: NOT optical observations.
  35. SVOM GRB 260515A: MASTER OT J151044.43+243321.7 optical counterpart detection
  36. GRB 260515A: SVOM/VT optical candidate from VHF data
  37. GRB 260515A: JinShan optical counterpart candidate
  38. GRB 260510C: Glowbug gamma-ray detection
  39. IceCube-260504A: No Candidate Transients from the Zwicky Transient Facility
  40. EP260514a: GROWTH-India Telescope optical upper limit
  41. GRB 260511B: NOT optical observations
  42. Konus-Wind detection of GRB 260512A
  43. GRB 260510C: CALET Gamma-Ray Burst Monitor detection
  44. GRB 260511B: GMG Optical Upper Limit
  45. EP260514a: Global MASTER-Net observations report
  46. EP260512a: LCO optical upper limits
  47. IPN triangulation of GRB 260512A
  48. GRB 260511B: Mephisto multi-band optical followup
  49. Fermi GRB 260514A: Global MASTER-Net observations report
  50. GRB 260512A: AstroSat CZTI detection
  51. EP260512a: EP-FXT follow-up observation
  52. EP260507a: Xinglong Schmidt optical counterpart detection
  53. EP260512a: Global MASTER-Net observations report
  54. Fermi GRB 260513A: Global MASTER-Net observations report
  55. Fermi GRB 260512A: Global MASTER-Net observations report
  56. GRB 260511B: further SAO RAS optical observations
  57. GRB 260509A: SVOM/VT optical observations
  58. Konus-Wind detection of GRB 260511B
  59. EP260512a: COLIBRÍ optical upper limits
  60. GRB 260511B: further J-band observations by the SYSU 80 cm infrared telescope
  61. GRB 260511B: Calapai Observatory, Massa S. Giorgio (Messina), optical observation.
  62. GRB 260512A: NuSTAR detection of prompt emission
  63. GRB 260509A: Infrared J and Hs observations with MDM/MIRAGE
  64. GRB 260510C: Infrared J and Hs detections with MDM/MIRAGE
  65. EP260507a: Infrared J and Hs upper limits with MDM/MIRAGE
  66. GRB 260511A: Glowbug gamma-ray detection
  67. Konus-Wind detection of GRB 260511A
  68. MASS-Cube (GRID 2.0) detection of GRB 260511A
  69. MASS-Cube (GRID 2.0) detection of GRB 260507A
  70. GRB 260511B: SAO RAS optical observations
  71. GRB 260510D: Glowbug gamma-ray detection of a likely short burst
  72. GRB 260511B: FRAM-ORM optical detection
  73. GRB 260511A: EP-FXT follow-up observation
  74. GRB 260511B: EP-FXT follow-up observation
  75. GRB 260511B: LCO optical counterpart detection
  76. GRB260511B: MAO/AZT-22 optical observations
  77. GRB 260511A: SVOM/VT optical observations
  78. GRB 260511B: LCO optical observations
  79. GRB 260511B: OHP/T193 spectroscopic observations
  80. GRB 260511B: GOTO optical counterpart detection
  81. GRB 260511B: Xinglong 2.16m/BEFOSC redshift confirmation
  82. GRB 260510C: SVOM/COLIBRÍ (FM-GFT) further optical observations
  83. GRB 260511B: SVOM/VT optical observations
  84. GRB 260511B: SVOM/COLIBRÍ (FM-GFT) optical observations
  85. GRB 260510B: EP-FXT follow-up observation
  86. GRB 260511B: OSIRIS+/GTC redshift z=2.006
  87. GRB 260510C: Fermi GBM Observation
  88. GRB 260509A: SAO RAS optical observations
  89. GRB 260511A: REM near-infrared detection
  90. GRB 260511B: GROWTH-India Telescope optical observations
  91. GRB 260511B: AstroSat CZTI detection
  92. GRB 260506B: Glowbug gamma-ray detection
  93. GRB 260506A: Glowbug gamma-ray detection of a short burst
  94. GRB 260511B: J-band observations by the SYSU 80 cm infrared telescope
  95. GRB 260511B: NuSTAR detection of prompt emission
  96. GRB 260511A: NuSTAR detection of prompt emission
  97. GRB 260511B: Fermi GBM Detection
  98. GRB 260511B: SVOM/VT optical observation with VHF data
  99. GRB 260511B: TRT optical observation
  100. GRB 260510B: SVOM/ECLAIRs refined analysis

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