All Tables

Table 1: Observations of Comet Hale-Bopp. n: number of comet spectra per night, $r_{\rm h}$ and $\Delta$ : heliocentric and geocentric distances, $\beta$ : phase angle, $\Delta \psi$ : spatial scale per pixel, $\Delta \lambda$ : wavelength scale per pixel, x: slit width. Negative $r_{\rm h}$ indicates observations before perihelion on April 1, 1997.
Table 2: Overview of B- and R-filter images used here. $r_{\rm h}$ and $\Delta$ denote heliocentric and geocentric distances. The standard star used for calibration of the comet images is quoted. The calibrations were performed using the standard star from each field with color indices similar to the solar colors.
Table 3: Comparison of the reddening from spectra, R(spectra), on the wavelength interval [4400 Å, 7100 Å] and from B and R filter images, R(images). ( $^\ast$ Result possibly affected by cirrus clouds during observation of spectrophotometric standard star).