Optical follow-up of MAXI J1910-057

ATel #15226; R. Hosokawa, K. L. Murata, M. Niwano, N. Ito, H. Takamatsu, Y. Imai, S. Sato, M. Takaku, R. Noto, R. Yamaguchi, Y. Yatsu, and N. Kawai (TokyoTech) report on behalf of the MITSuME collaboration
on 17 Feb 2022; 05:34 UT
Credential Certification: Katsuhiro Murata (murata@hp.phys.titech.ac.jp)

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We report optical observation of black hole candidate MAXI J1910-057. The object renewed activity in X-ray is reported by MAXI (ATel #15214) and radio source associated with MAXI J1910-057 is also reported (ATel #15219). We observed this object on 2022 February 15 with the optical three color (g', Rc, and Ic) CCD cameras attached to the MITSuME 50 cm telescope Akeno and marginally detected a source in Rc and Ic band. We performed forced photometry and obtained the preliminary magnitudes as follows:

g'>17.6, Rc=16.9+/-0.1, Ic=16.7+/-0.1 on 2022-02-15 (MJD 59625.84)

We also observed on 2022 February 8 and 2021 November 15 but did not detect this object. The 5-sigma limits of the stacked images are as follows.

g'>16.9, Rc>17.0, Ic>16.6 on 2022-02-08 (MJD 59618.85)
g'>18,7, Rc>18.7, Ic>18.3 on 2021-11-15 (MJD 59533.43)

We used the PS1 catalog for flux calibration. The magnitudes are expressed in the AB system. The images were processed in real-time through the MITSuME GPU reduction pipeline (Niwano et al. 2021, PASJ, Vol.73, Issue 1, Pages 4-24; https://github.com/MNiwano/Eclaire). We will continue simultaneous multi-color observation with the MITSuME 50cm telescope. Multiwavelength follow-up observations are encouraged.