We demonstrate that the combination of GALEX UV photometry in the FUV (∼ 1530 angstroms) and NUV (∼ 2310 angstroms) passbands with optical photometry in the standard U,B, V,R, I filters can efficiently break the age-metallicity degeneracy. We estimate well-constrained ages, metallicities and their associated errors for 42 GCs in M31, and show that the full set of FUV,NUV,U,B, V,R, I photometry ...

We present BVRI photometry of the Type Ia supernovae 1999da, 1999dk, 1999gp, 2000bk, and 2000ce, plus infrared photometry of three of these. These objects exhibit the full range of decline rates of Type Ia supernovae. Combined optical and infrared data show that families of V − infrared color curves can be used to derive the host extinction (AV ) of these objects. Existing data do not yet allow...

We demonstrate that the combination of GALEX UV photometry in the FUV (∼ 1530 angstroms) and NUV (∼ 2310 angstroms) passbands with optical photometry in the standard U,B, V,R, I filters can efficiently break the age-metallicity degeneracy. We estimate well-constrained ages, metallicities and their associated errors for 42 GCs in M31, and show that the full set of FUV,NUV,U,B, V,R, I photometry ...

We present Spitzer 5–15 μm spectroscopy of one cool white dwarf and 3.6–8 μm photometry of 51 cool white dwarfs with Teff < 6000 K. The majority of our targets have accurate BVRIJHK photometry and trigonometric parallax measurements available, which enables us to perform a detailed model atmosphere analysis using their optical, nearand mid-infrared photometry with state-of-the-art model atmosph...

Mayall II = G1 is one of the most luminous globular clusters (GCs) in M31. Here, we determine its age and mass by comparing multicolor photometry with theoretical stellar population synthesis models. Based on farand near-ultraviolet GALEX photometry, broad-band UBV RI , and infrared JHKs 2MASS data, we construct the most extensive spectral energy distribution of G1 to date, spanning the wavelen...

We present our catalog of U , B, V , and I stellar photometry of the central 18 sq.◦ area of the Small Magellanic Cloud. We combine our data with the 2MASS and DENIS catalogs to provide, when available, U through KS data for stars. Internal and external astrometric and photometric tests using existing optical photometry (U , B, and V from Massey’s bright star catalog; B, V , and I from the micr...

We have conducted an optical long-term monitoring survey of the majority of dwarf galaxies in the Local Group, with the Isaac Newton Telescope (INT), to identify the long period variable (LPV) stars. LPV stars vary on timescales of months to years, and reach the largest amplitudes of their brightness variations at optical wavelengths, due to the changing temperature. They trace stellar populati...

1 ; 2 ; > (running over all views). Each additional view contributes linearly 12 parameters and its tensor with 1 ; 2 can be determined linearly using 6 matching points. More details on the material presented in this section can be found in 14]. 6 summary This paper has presented results on the goal of capturing the interrelationship , geometrically and pho-tometrically, across multiple perspec...