Swift XRT observations of the high redshift (z=2.1) flat spectrum radio quasar 4C+01.02
Light Curve
The high redshift (z~2.1) flat spectrum radio quasar (FSRQ) 4C+01.02 (ICRS coordinate. (ep=J2000): RA 01 08 38.77, Dec +01 35 00.3) was observed by Fermi-LAT in gamma-ray (>100 MeV) in high activity state (https://fermi.gsfc.nasa.gov/FTP/glast/data/lat/catalogs/asp/current/lightcurves/4C+01.02 86400 1yr.png). Following the gamma-ray bright state, X-ray observations of the source were triggered with Swift-XRT. The proposed observation was conducted from September 1, 2022 (11:52:00 UTC), to September 2, 2022 (08:34:00 UTC), in the photon counting (PC) mode for a net exposure of 1.1 Ks. The ToO observation suggests that the source is in the bright state in the X-ray band. The preliminary analysis has been performed fitting the X-ray spectrum with an absorbed power-law considering the galactic absorption corresponding to hydrogen column density of N_H=2.42 x 1020 cm^-2 (Kalberla et al. 2005, A&A, 440, 775). The observed X-ray (0.3-10 keV) flux on September 1, 2022, is found to be 4.21(+0.80,-0.80) x 10^-12 erg cm^-2 s^-1 is one of the highest flux states of the source. The power law spectral index during this observation is 1.43 (+0.41, -0.41). In light of ongoing activity in Swift-XRT, we encourage further multiwavelength observation of 4C+01.02 (PKS 0106+01, OC 12). We thank the Swift Team and Observatory Duty Scientists who made these observations possible.