Scanner observations of P/Halley (1982i)

Abstract

The scanner observations of periodic Comet Halley (1982i) have been presented in the wavelength region XA3200-7000 w for three nights during pre-perihelion period. Emission features due to NH, CN, CH, C,, C,, and NH, molecules have been identified. The abundances and production rates of CN and C, species have been estimated.

Scanner observations of comet P/Crommelin 18181

“…An exit slit of 50 A band pass was used for scanning the spectrum. The other instrumental details have already been described (Goraya et al, 1982). A cooled (-20°C) EM1 9658B photomultiplier and standard d.c. techniques were employed for detecting and recording the signal.…”

“…The total luminosity (L) of Cz(AV= 0) is given in the last column of Table II. a Lambert (1978); b Goraya et al (1982).…”

“…O'Dell and Osterbrock, 1962) used in our earlier paper (Goraya et al, 1984). The values off, p and e(v, r) used in our calculations are given in Table III along with their sources.…”

“…The production rates (Q) of CN and CZ molecules are derived under the assumptions and the relation used by us previously (Goraya et al, 1986). The values of g and r used in our calculations are given in Table IV.…”

“…The comet was observed successfully all over the world by a large a Newburn and Johnson (1978); b A' Hearn and Cowan (1975). 1984. Larson (1984 obtained spectra of comet P/Crommelin on February 1 and 2, March 1 and 2.…”