0.38 - 2.5 m Spectroscopy and Simultaneous BVR Photometry of DEEP IMPACT

Astronomy and Astrophysics – Astronomy

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Scientific paper

Simultaneous 0.48 - 2.5 micron spectroscopy and BVR photometry of the DEEP IMPACT were obtained at Lick Observatory using the VNIRIS spectroraph on the 120" telescope and the OSETI high speed photometer on the 40" Nickel telescope. The spectra showed an increase in brightness of about 4 in the first 40 minutes after impact. The already weak molecular emission features weakened further after the impact, indicating a larger component of dust and particulates in the ejected material. The absence of an impact flash was the result of impact occuring unexpectedly behind the limb.

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