Medium-band Observation of the Neutrino Emitting Blazar, TXS 0506+056

TXS 0506+056 is a blazar that has been recently identified as the counterpart of neutrino event IceCube-170922A. Understanding type important to constrain emission mechanism, but nature still uncertain. As an attempt understand 0506+056, we report medium-band observation results covering wavelength range 0.575 1.025 $\mu$m. The use filters allow us examine if there were any significant changes in its spectral shapes over course one month and give better constraint on peak frequency synchrotron radiation with quasi-simultaneous datasets. found be $10^{14.28}$ Hz, our analysis shows not outlier from sequence. way determine type, also analyzed bluer-when-brighter (BL Lac some flat spectrum radio quasars, FSRQs) or redder-when-brighter (found only FSRQs). Even though detect no variability shape larger than observational error during period, comparison dataset taken at 2012 possible behavior FSRQs. Our demonstrate observations small moderate-sized telescopes can effective trace evolution transients such 0506+056.