We present three dimensional maps in monochromatic extinction $A_{ \rm 0}$ and the extinction parameter $R_0$ within a few degrees of the Galactic plane. These are inferred using photometry from the Pan-STARRS1 and Spitzer Glimpse surveys of nearly $20$ million stars located in the region $l = 0-250^{ \circ}$ and from $b = -4.5^{ \circ}$ to $b=4.5^{ \circ}$. Given the available stellar number density, we use an angular resolution of $7' \times 7'$ and steps of $1{ \rm mag}$ in distance modulus. We simultaneously estimate distance modulus and effective temperature $T_{ \rm eff}$ alongside the other parameters for stars individually using the method of \citet{ Hanson2014} before combining these estimates to a complete map. The full maps are available via the MNRAS website.
Categories: astro-ph.GA