Image Details
Caption: Figure 22.
Photometry of BD+17°4708. Left: photometry vs. Julian date from the SNfactory (filled green circles), Hipparcos (Perryman et al. 1997), converted from Hp magnitudes to V using the formula of Bessell (2000; open red circles), and from Bohlin & Landolt (2015; open blue pentagons). The brightening trend in the Bohlin & Landolt (2015) photometry is readily apparent. It is difficult to definitively ascertain whether that brightening is supported by the Hipparcos data or not. But our new data show that such a brightening did not continue. Right: the same photometry vs. the orbital phase determined by Latham et al. (2002). The phase zero-point is arbitrary. For both figures, for the SNfactory data, we show the binned medians and then shade the range of the robust error on the median. For the left figure, we also show the binned medians and robust error on the median for the Hipparcos data.
© 2022. The Author(s). Published by the American Astronomical Society.