& 10.24 & 0.01\
&2456137.23654&56136.73122 & ... & ... & 12.40 & 0.01 & 10.28 & 0.01

Spectroscopy with Subaru/IRCS
-----------------------------

In 2010 and 2012, we collected near-infrared spectra of our Cepheids at several epochs when possible using the Infrared Camera and Spectrograph (IRCS) attached to the Subaru 8.2 m telescope [@Kobayashi-2000]. This instrument allows us to obtain high-resolution ($\lambda/\Delta\lambda = 20,000$) echelle spectra in the near-infrared region. We observed [GCC-a]{} three times, [GCC-b]{} and -c twice, and [GCC-d]{} once. Most spectra were in the $H$-band but one $K$-band spectrum of [GCC-a]{} was taken in June 2010 (Table \[tab:log\]). During the July 2012 run, we used the adoptive optics system, AO188, with laser star guiding [@Hayano-2010]. Unfortunately, the AO-guided observations in the other runs (June 2010 and May 2012) were interrupted by instrumental problems and poor seeing condition, and the quality of the spectra was poorer than that in July 2012. Nevertheless, all data were usable in the radial velocity measurements.

[cccccr]{} 2010-06-21 09:30&2455368.90243&[GCC-a]{}&$K$&$300 \times  8$ & 45\
2012-05-26 14:00&2456074.08954&[GCC-a]{}&$H$&$300 \times 12$ & 25\
2012-05-26 11:00&2456073.96453&[GCC-b]{}&$H$&$300 \times 12$ & 25\
2012-05-26 12:40&2456074.03398&[GCC-c]{}&$H$&$300 \times 12$ & 25\
2012-07-27 07:30&2456135.81792&[GCC-a]{}&$H$&$300 \times 12$ & 100\
2012-07-27 09:00&2456135.88041&[GCC-b]{}&$H$&$300 \times 12$ & 100\
2012-07-28 08:00&2456136.83868&[GCC-c]{}&$H$&$300 