A new outburst from Cygnus X-3 observed with the Nasu telescope array at 1.4GHz
ATel #16455; K. Tsubono (Univ. Tokyo), K. Asuma (Asaka High School), K. Niinuma (Yamaguchi Univ.), K. Takefuji (JAXA) and T. Daishido (Waseda Univ.)
on 17 Feb 2024; 02:51 UT
Credential Certification: Kimio Tsubono (tsubono@phys.s.u-tokyo.ac.jp)
Subjects: Radio, Binary, Black Hole, Transient
About two years have passed since the last outbursts of Cygnus X-3 in 2021-2022 (ATel #15142, #15152).
We detected a new outburst on 2024 February 16 UT with the Nasu telescope array at 1.4GHz. The flux density was 1.8 +/- 0.04 Jy on February 16 01:30 UT (MJD 60356.0627) at 1.4GHz.
We will continue our radio monitoring for a while.
Recent Swift/BAT data (15-50 keV; http://swift.gsfc.nasa.gov/results/transients/CygX-3/ ) would suggest that Cygnus X-3 is into the quenched state.
The Nasu telescope array is a spatial fast Fourier transform (FFT) interferometer consisting of eight linearly aligned antennas with 20 m spherical dishes. This type of interferometer was developed to survey transient radio sources with an angular resolution as high as that of a 160 m dish and a field of view as wide as that of a 20 m dish.
