Free Access

Fig. 7

image

Comparison of the light curves of M31N 2008-12a (black) with the Galactic RNe RS Oph (blue) and U Sco (red) in normalised time scales. Filled black circles, for M31N 2008-12a, indicate V magnitudes as presented in DHS2015 and filled black squares show the X-ray count rates (compare Fig. 2 and Table 1). Blue asterisks, for RS Oph, give the optical (V, visual and y) magnitudes taken from Hachisu et al. (2006) and blue open circles indicate the X-ray count rates (0.3–0.55 keV) taken from Hachisu et al. (2007). Red dots, for U Sco, show the optical magnitudes taken from the AAVSO archive while small open red circles give the X-ray count rate (0.2–1.0 keV) deduced from the Swift archive. The black solid line indicates a theoretical light curve for the SSS blackbody flux from a 1.377 M WD with a chemical composition of X = 0.6, Y = 0.38, and Z = 0.02 between and .

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.