Detections of diffuse interstellar bands toward the SN 1987A in the Large Magellanic Cloud

Vladilo, G.; Crivellari, L.; Molaro, P.; Beckman, J. E.
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Astronomy and Astrophysics (ISSN 0004-6361), vol. 182, no. 2, Aug. 1987, p. L59-L62.

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The authors report the results of high resolution and high S/N observations of diffuse interstellar bands (DIBs) towards SN 1987A in the LMC. For the first time they clearly detect the LMC component of the 5780, 5797 and 6284 Å DIBs, and possibly that of 5778 and 6269 Å. Moreover, they observe the Galactic components of the 5778, 5780, 5797, 6283, 6376 and 6379 Å bands, along a line of sight with very low reddening [E(B-V) ≅ 0.07]. The LMC components are generally weaker than the Galactic ones, while the opposite is observed for ISNa I and K I. The band strengths are compared with the total color excess towards the supernova.