COMMISSION 27 OF THE I. A. U. INFORMATION BULLETIN ON VARIABLE STARS Number 2878 Konkoly Observatory Budapest 14 March 1986 HU ISSN 0374 - 0676 NEW VARIABLE STARS IN CASSIOPEIA In a previous report (Dahlmark, 1982) 58 new variables in Cygnus were presented. The present work is a continuation of that survey in an area 20deg x 15deg centered at 1h06m + 60deg01'. Seventeen plate pairs exposed in the period 1967 to 1981 were collected and treated in the same way as described in the previous report. These observations provide approximate B and V magnitudes. In addition, six exposures were obtained in the period August 8 to September 23, 1985 on Technical Pan film. During the period 1982 to 1985 all variables were observed 4 to 9 times using a Newton 21/166 cm reflector, equipped with a Varo S20 image intensifier camera (IC) for 35 mm film. The calibrations of magnitude scales were obtained from Hoag et al. (1961) for the cluster NGC 225, which was observed with the IC at the beginning and end of each observing night. In this survey 39 new variable stars were found. They are presented in Table I together with information on V 485 Cas (LD 68). Most of the variables are red - 20 could not be traced on the B-plates. The IC is equipped with a Schott BG 12 (2 mm) filter for the B band and GG 495 (1 mm) + BG 38 (2 mm) filters for the V band. With this system approximate B-V colors were derived for 10 variables. Since these B-V values are about 0.2 magnitudes smaller than those derived from the photographic plates we emphasize that the B-V colors given below should be regarded only as rough estimates. In Table I the first column gives the provisional designation of the star, columns 2 and 3 the position, column 4 the range in visual magnitude, column 5 the approximate B-V color and column 6 approximate V magnitude of a close neighbour star that may influence magnitude estimations made with an instrument with small focal length. The notes in the last column refer to: 1. observed only with IC (nine observations 1982-1985): 2. LD 68 = V 485 Cas; 3. B-V from IC observations; 4. flare star? [FIGURE 1] [FIGURE 1c] Table I New variables in Cassiopeia Plate centre 1h06/+60d No R.A. Decl. m(V) B-V n.s. n. No R.A. Decl. m(V) B-V n.s. n. (1950) (1950) max min color (1950) (1950) max min color LD 66 23h48m32s 60d39' 13.0-(16.5 - 13.6 1 LD 86 00h32m49s 63d53' 12.3- 14.7 )2 LD 67 23 56 33 61 47 13.5- 16.0 )1 13.8 LD 87 00 46 43 66 12 13.5- 14.3 0.5 14.5 LD 68 23 59 35 64 38 13.0- 15.5 0.5 12.0 2 LD 88 00 48 03 58 20 12.6- 13.6 )1.8 LD 69 23 59 45 57 49 13.3- 14.5 )1 LD 89 00 50 21 64 46 13.0- 15.5 )1 14.0 LD 70 00 00 43 66 52 13.6- 15.0 )0.7 LD 90 00 53 27 59 24 12.2-(15.0 )2 LD 71 00 01 10 59 28 13.6- 15.8 - LD 91 00 53 40 66 59 12.2- 14.0 2.0 15.5 3 LD 72 00 01 37 60 32 13.8- 15.0 )1 LD 92 00 54 12 67 05 13.0-(15.0 )1.5 LD 73 00 01 40 65 02 13.6- 14.5 )0.5 LD 93 00 56 03 63 32 10.9- 13.2 2.7 3 LD 74 00 04 33 61 32 11.5- 14.0 2 LD 94 00 56 21 60 28 11.9- 14.7 1.8 3 LD 75 00 04 52 63 04 12.4- 13.4 0.6 LD 95 01 11 01 56 05 12.7- 13.8 0.1 LD 76 00 05 00 64 27 12.0- 16.0 2.2 3 LD 96 01 11 39 63 21 10.8- 16.2 3.0 LD 77 00 05 40 52 29 11.6- 16.8 2.4 LD 97 01 15 51 53 12 13.5- 16.0 )1 LD 78 00 08 40 64 03 11.5- 16.5 2.7 14.0 3 LD 98 01 16 55 64 12 12.7- 13.7 1.7 15.0 3 LD 79 00 13 51 65 45 12.0-(16.4 )0.7 LD 99 01 30 47 61 56 13.5- 14.5 0.1 4 LD 80 00 14 12 58 02 13.0- 14.3 0 13.7 LD100 01 40 00 59 45 11.5- 13.0 1 LD 81 00 15 20 58 53 13.5-(17.0 )1 14.5 LD101 01 53 12 59 42 12.8- 15.0 1.2 3 LD 82 00 17 14 56 19 12.5-(16.5 )0.5 LD102 01 57 35 58 22 11.3- 13.5 2.2 15.5 LD 83 00 24 38 59 03 11.4- 13.2 2 LD103 01 57 53 58 03 9.8- 12.0 3.8 3 LD 84 00 31 33 64 16 12.8- 15.0 1.8 13.5 3 LD104 01 59 13 62 48 13.0- 14.7 )1.5 LD 85 00 32 25 52 37 12.2-(15.0 2.3 LD105 02 26 40 62 19 12.0- 14.0 2 13.8 The finding charts, Figure 1, were obtained with the IC without filter connected to the Newton 21/166 cm reflector. Individual magnitude estimates can be delivered upon request. LENNART DAHLMARK Montlaux F-04230 St. Etienne les Orgues France References: Dahlmark, L. 1982, Information Bull. on Variable Stars, No 2157. Hoag, A.A. , Johnson, H.L., Iriarte, B. , Mitchell, R.I., Hallam, K.L. and Sharpless, S. 1961, Publ. U.S. Naval Obs. 17, 1. [BIBCODE 1961PUSNO..17..343H ]