supernovae: individual: 2011dh

Type IIb Supernova SN 2011dh: Spectra and Photometry from the Ultraviolet to the Near-infrared

We report spectroscopic and photometric observations of the Type IIb SN 2011dh obtained between 4 and 34 days after the estimated date of explosion (May 31.5 UT). The data cover a wide wavelength range from 2000 ̊A in the ultraviolet (UV) to 2.4 μm …