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SN2009hd is a Highly-reddened Type IIP Supernova

ATEL # 2118; E. Berger, R. Foley (Harvard), and R. Covarrubias (LCO)
on 9 Jul 2009; 2:05 UT
Distributed as an Instant Email Notice (Supernova)
Password Certification: Edo Berger (

Subjects: Optical, Nova, Supernova, Transients

We used the Magellan Echellete spectrograph (MagE) on the Magellan/Clay 6.5-m telescope to obtain a spectrum of SN2009hd in M66 (CBET #1867). The observations were taken on 2009 July 9.0 UT with a total exposure time of 900 sec. Inspection of the 1-d spectrum reveals a very red continuum dominated by broad H-alpha emission with a FWHM of about 6000 km/sec and a minimum that corresponds to a velocity of about 5800 km/sec. We therefore conclude that SN2009hd is a highly-reddened type IIP supernova. This explains its inferred low luminosity and relatively flat light curve (ATel #2109 and #2113).

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R. E. Rutledge , Editor
ATEL Mirror v1.0 Updates