@conference {23878,
	title = {Probing the Extinction in M31 via a Spectrum of a Quasar Seen through its Disk},
	volume = {1356},
	year = {2011},
	month = {2011/07/1},
	pages = {45 - 49},
	abstract = {We reexamined the total extinction along the sightline of a quasar (J004457+4123) behind the disk of M31 and used a varying total-to-selective extinction ratio in order to obtain a better agreement between its optical spectrum and a composite SDSS spectrum based on input spectra of quasars from DR7 at similar redshifts. The M31 outermost disk predominates (~85\%) the total foreground (Milky Way+M31) selective extinction EB-V = 0.30+/-0.05 mag and the derived gas-to-dust ratio is N(H)/EB-V = (3.5+/-0.7){\texttimes}10<SUP>20</SUP> atcm<SUP>-2</SUP> mag<SUP>-1</SUP>.},
	keywords = {98.54.Aj, 98.58.Ca, 98.62.Mw, 98.62.Py, diffuse emission, Distances redshifts radial velocities, GALAXIES, Infall accretion and accretion disks, infrared cirrus, Interstellar dust grains, interstellar matter, quasars, redshift, spatial distribution of galaxies},
	isbn = {0094-243X},
	url = {https://ui.adsabs.harvard.edu/abs/2011AIPC.1356...45N},
	author = {Nedialkov, P. and Williams, B. and Green, J. and Hatzidimitriou, D.}
}
