COMMISSION 27 OF THE I. A. U. INFORMATION BULLETIN ON VARIABLE STARS Number 2135 Konkoly Observatory Budapest 1982 April 30 HU ISSN 0374-0676 SPECTROPHOTOMETRIC OBSERVATIONS OF THE STAR MWC 17 IN JANUARY 1982 The star MWC 17 was discovered by Merrill et al. (1932) who classified it as a Be type star with a magnitude m_pg= 12.2. As other objects of this type (emission line stars and shell stars e.g. Z And ) MWC 17 probably shows light variations. Swings (1941) identified most of the emission lines of low ionization. Latter the designation BQ[ ] indicative of a variety of hot stars which present forbidden lines together with absorption bands, was assigned to MWC 17 by Ciatti et al. (1974) on the basis of spectroscopic observations. Table I Spectroscopic observations of MWC 17 J.D. Plate No Date (1982) 2440000+ Exp. time (min.) D 1234 January 27 4997 85 D 1238 January 30 5000 70 D 1240 January 31 5001 100 Table II Relative emission line intensity for MWC 17 ---------------------------------------------------------- lambda_obs (A) Elements 27.1.82 30.1.82 31.1.82 ---------------------------------------------------------- 3835 H_eta 0.30 0.32 0.15 3889 HeI (2) +Hzeta 0.53 0.25 0.28 3933 CaII ab 0.25 0.15 0.28 3970 Hepsilon + HeI 0.47 0.16 0.07 4068 [SII] (1F) 0.26 0.20 0.15 4102 H_delta 0.61 0.15 0.23 4178 FeII (28) 0.13 0.05 0.12 4227 CaI ab 0.15 0.08 0.11 4233 FeII (27) 0.21 0.09 0.13 4244 [FeII](27F) 0.24 0.19 0.19 4286 [FeII](7F) 0.29 0.16 0.07 4341 H_gamma 0.87 0.67 0.68 4359 [FeII]21F 0.68 0.79 0.69 + 7F 4415 FeII (32) 0.33 0.10 0.08 4452 [FeII] (7F) 0.27 0.16 0.18 4471 HeI (6) 0.27 0.06 0.07 4491 FeII (37) 0.29 0.11 0.06 4520 FeII (37) 0.30 0.09 0.07 4549 FeII (38) 0.18 0.11 0.19 4581 FeII (37) 0.32 0.14 0.21 4629 FeII (37) 0.25 0.11 0.23 4658 [FeIII](3F) 0.21 0.15 0.13 4814 [FeII](20F) 0.12 0.09 0.09 4861 Hbeta 1.00> 1.00 1.00 4922 HeI (48) 0.32 0.12 0.14 + FeII (42) 4955 [OIII] (1F) 0.08 0.10 0.03 5007 [OIII] (1F) 0.43 0.20 0.22 5017 HeI (4) 0.43 0.20 0.20 + FeII (42) 5159 [FeII] 19F 0.16 0.11 0.07 5194 [AIII] 3F 0.17 0.10 0.06 5266 [FeII] 19F - - - + FeII 49 5331 [FeII] 3F - - - Three spectra of MWC 17 were obtained with the 80cm telescope at Observatoire de Haute-Provence in January 1982. The reciprocal dispersion was about 93 A mm^-1 at H_gamma. Relative intensities for emission lines were estimated from calibration curves. Table I gives the date and exposure time. Table II gives the identified lines, the multiplet number of the corresponding transition and the intensity of the lines relatively to I(H_beta) = 1.0. As for symbiotic stars emission lines of FeII and [FeII] are observed simultaneously and the intensity ratio [SII]/[Fe II] appears close to the unity. Emission lines of HeI and [AIII) (IP: 27.60 ev) are observed suggesting a region ionized by a hot source and a region of low ionization which emits [FeII) lines. The value 0.06 is found for the intensity ratio I(4471)/I(H_beta) on January, 30 from calculations using the model of Brochlechurst (1972). This small value may be due to self absorption in the H_beta line as shown by Leibowitz (1977). R. GRAVINA Observatoire de Lyon 69230 Saint-Genis-Laval France ^* In Table II [FeII] lines lambda 4359 A are blended with Hg line at lambda 4358 A. References: P.W. Merrill, M.L. Humason, C.G. Burwell, Astrophys. J. 76, 158, (1932) [BIBCODE 1932ApJ....76..156M ] P. Swings, Astrophys. J. 93, 351 (1941) [BIBCODE 1941ApJ....93..349S ] M. Brochlechurst, Monthly Notices Roy. Astron. Soc. 161, 145 (1972) [BIBCODE 1972MNRAS.157..211B ] A. Allen, J.P. Swings, Monthly Notices Roy. Astron. Soc. 161, 145 (1973) [BIBCODE 1973MNRAS.161..145A ] F. Ciatti, S. D'Odorico, A. Mammano, Astron. and Astrophys. 34, 181 (1974) [BIBCODE 1974A&A....34..181C ] M. Leibowitz, Astron. and Astrophys. 56, 265 (1977) [BIBCODE 1977A&A....56..265L ]