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Proceedings of Supernovae: lights in the darkness — PoS(SUPERNOVA)
The determination of the extinction in different directions in the Galaxy and in external galaxies is of paramount importance in several fields of astrophysics. The determination of the extinction law provides clues to the nature of the Inter/Circum-Stellar Medium (ISM/CSM), specifically to that of the dust particles. Recent studies have shown that the extinction curves toward a few, highly-reddened SN Ia have values of R V , the ratio of total-to-selective extinction, significantly lower thandoi:10.22323/1.060.0011 fatcat:pviecfdkwzbefn3aqpy7d7og2q