The Appearance and Disappearance of Exocomet Gas Absorption

Table 3

Stars showing no change in CaII K-line absorption.

Star	Dates observed	CaII-K (EW)av	Line velocity	LISM velocity	Radial velocity	ISM or C/S
		mÅ	(km s^−1)	(km s^−1)	(km s^−1)
HD 88195	03-01- to 03-07-2013	42.8 ± 4.0	+9.0, +21.8	+9.2, +20.5	+21.0	ISM
HD 106591	03-01- to 03-07-2013	5.5 ± 1.0	−1.0, +12.5, +25.0	+2.1	−15.3	ISM
HD 135742	05-08- to 05-13-2014	7.5 ± 1.0	−24.0	−27.0	−35.6	ISM
HD 158352	08-18- to 08-23-2010	25.5 ± 2.0	−37.0, −28.0	−28.1	−36.1	C/S + ISM
HD 161868	August 2005 to September 2006	7.3 ± 0.8	−29.0	−27.3	−7.6	ISM
HD 184006	09-21- to 10-07-2013	14.5 ± 2.0	−8.3, −17.4	−7.8	−19.5	C/S + ISM

The observed CaII absorption line is mainly of interstellar (ISM) or circumstellar (C/S) origin.