COMMISSION 27 OF THE I. A. U. INFORMATION BULLETIN ON VARIABLE STARS NUMBER 662 Konkoly Observatory Budapest 1972 April 14 OBSERVATIONS OF VARIABLE STARS IN NGC 1261 In announcing 7 new variables in NGC 1261 (1) the authors did not take into account the catalogue of Fourcade, Laborde and Albarracin (2). Vars. no. 7, 9, 12 of Bartolini et al. (1) are the same as vars. no. 10, 8, 11 of Fourcade et al. (2); Bartolini's variables no. 8, 10, 11, 13 are new and we are proposing to assign them numbers 12, 13, 14, 15. Owing to small discrepancies between our values and those of Fourcade we measured the coordinates of all the variables obtaining: Var. No. X Y Var. No. X Y 1 -29.8 -28.4 9 +37.9 -38.8 2 -39.8 +34.9 10 +52.3 +70.6 3 +49.6 -54.6 11 -89.0 +89.5 4 +31.8 -36.1 12 +87.1 -10.5 5 -34.5 -5.0 13 -77.1 -96.0 6 +78.1 -12.3 14 -53.5 -70.7 7 -149.3 +140.2 15 -114.5 +129.1 8 -133.7 -139.0 From August 14 to September 11, 1970, 11B plates (IIa - o + GG 13) were taken with the 40 inch (f/8) telescope of Siding Spring Observatory; the exposure time was 35 minutes for every plate. Using the photoelectric sequence of Alcaino and Contreras (3), we determined the magnitudes reported in Table I; magnitudes of the vars. no. 2, 5, 7, 9 and 14 were visually estimated, the others were obtained with a II Zeiss fixed aperture photometer. Magnitudes of the vars. no. 3 and 5 are affected by blending of the variable with another close star. On the basis of the RR Lyrae stars we were able to classify, the ratio n_c/n_ab is 0.25 and NGC 1261 seems to be an A type globular cluster according to the classification of Castellani et al. (4). The var. no. 15, which is included among the standards of Alcaino and Contreras, is slowly varying and in B is more than 1.3m brighter than the RR Lyrae variables. As it is very red (B-V=+1.67) (3), in V the difference of magnitude with the RR Lyrae increases to about 2.6m, and from its position in H-R Diagram (3) we are led to believe that it is an irregular or long period variable star. C. BARTOLINI F. GRILLI F. MORISI Osservatorio Astronomico dell'Universita di Bologna 6, April 1972 TABLE I J.D. - 2440000 2 3 5 6 7 8 9 10 11 12 13 14 15 813.203 17.2 16.30 16.4 17.15 17.15 16.13 16.9 16.22 16.85 16.68 17.05 16.22 15.28 814.180 17.1 16.67 16.25 16.77 17.3 17.48 16.95 17.93 17.29 17.42 17.35 17.23 15.21 837.072 17.0 16.29 16.8 17.19 16.9 17.24 16.85 16.60 16.91 16.94 17.15 17.05 15.82 .100 16.9 16.43 16.75 17.32 17.05 17.36 16.85 16.17 16.98 17.02 17.24 17.0 15.76 .173 16.1 16.50 16.75 17.04 17.2 17.38 17.15 16.62 17.08 17.25 17.19 17.0 15.79 .207 16.05 16.50 16.6 16.50 17.3 17.39 17.15 16.77 17.13 17.29 16.91 17.0 15.77 .233 16.15 16.48 16.35 16.32 17.15 17.42 17.15 16.87 17.13 17.28 16.85 16.95 15.86 .258 16.25 16.45 16.1 16.46 16.9 17.44 16.85 16.99 17.24 17.41 16.79 16.7 15.81 841.219 15.88 16.8 16.54 17.1 16.55 17.05 16.41 17.21 16.35 17.19 17.05 15.78 .244 15.99 16.85 16.58 16.9 16.75 17.1 16.49 17.23 16.39 17.23 17.15 15.75 .270 16.10 17.0 16.75 16.85 16.85 17.1 16.70 17.19 16.59 16.90 16.85 15.82 Prob. RR Type ab ab ab ab c ab ab ab c ab [References] 1) Bartolini C., Grilli F., Robertson J.W. - I.B.V.S. 594 (1971) 2) Fourcade C.R., Laborde J.R., Albarracin J. - Atlas Y Catalogo de Estrellas Variables en Cumulos Globulares al sur de -29deg (Cordoba, 1966) 3) Alcaino G., Contreras C. - Astron. and Astrophys., 11, 14 (1971) [BIBCODE 1971A&A....11...14A ] 4) Castellani V., Giannone P., Renzini A. - Astrophys. and Space Sci., 9, 418 (1970). [BIBCODE 1970Ap&SS...9..418C ]