COMMISSIONS 27 AND 42 OF THE IAU INFORMATION BULLETIN ON VARIABLE STARS Number 3992 Konkoly Observatory Budapest 15 February 1994 HU ISSN 0374 - 0676 BVR OBSERVATIONS OF THE DOUBLE-MODE CEPHEID BQ Ser Recently one of us (Berdnikov, 1992) has decomposed available photoelectric observations of all double-mode Cepheids into two oscillations. It was pointed out as well that the number of the existing observations is not sufficient for certain investigation of light curve variations in the majority of these stars. Therefore we continue to carry out the observations of the all accessible double-mode Cepheids. Table 1 ----------------------------------------------------------------------- JD hel V B-V V-R JD hel V B-V V-R 2440000+ 2440000+ ----------------------------------------------------------------------- 9197.3755 9.632 1.547 1.338 9220.2735 9.341 1.375 1.231 9198.2273 9.778 1.590 1.365 9221.3286 9.378 1.440 1.260 9198.3235 9.773 1.566 1.378 9222.2763 9.648 1.572 1.334 9199.3321 9.207 1.318 1.203 9224.2880 9.479 1.472 1.271 9200.2375 9.429 1.442 1.280 9225.2501 9.455 1.430 1.277 9201.2437 9.726 1.571 1.364 9226.2522 9.420 1.425 1.275 9201.3630 9.735 1.586 1.358 9227.2446 9.573 1.539 1.323 9202.2491 9.633 1.542 1.303 9228.2541 9.755 1.583 1.356 9202.3635 9.616 1.512 1.320 9229.2445 9.221 1.330 1.199 9203.2318 9.414 1.414 1.262 9230.2469 9.421 1.458 1.289 9203.3535 9.424 1.433 1.270 9231.2479 9.726 1.595 1.365 9204.2292 9.477 1.456 1.284 9232.2356 9.673 1.533 1.350 9204.3528 9.475 1.459 1.293 9233.2373 9.359 1.389 1.244 9205.2326 9.502 1.462 1.311 9234.2370 9.499 1.486 1.293 9205.3627 9.516 1.474 1.302 9235.2304 9.536 1.507 1.304 9206.2591 9.615 1.539 1.338 9236.2145 9.601 1.505 1.328 9206.3721 9.633 1.551 1.321 9237.2066 9.640 1.524 1.319 9207.2389 9.681 1.515 1.341 9238.1978 9.242 1.356 1.216 9207.3558 9.624 1.486 1.306 9239.2023 9.474 1.485 1.297 9209.2223 9.484 1.489 1.294 9240.2145 9.772 1.609 1.372 9209.3636 9.521 1.505 1.330 9241.2169 9.578 1.489 1.308 9210.2941 9.772 1.606 1.372 9243.1952 9.577 1.529 1.324 9211.2693 9.559 1.476 1.288 9244.2201 9.640 1.545 1.339 9212.2726 9.348 1.396 1.267 9245.2177 9.559 1.496 1.317 9218.2878 9.558 1.503 1.332 9298.1059 9.353 1.382 1.247 9219.2781 9.805 1.589 1.389 ------------------------------------------------------------------------ Photoelectric observations of double-mode Cepheid BQ Ser were carried out in summer- autumn 1993. The 60-cm reflector of the Mt. Maidanak observatory of the Tashkent Astronomical Institute was used and 51 BVR measurements (Table 1) were obtained. The authors wish to express their thanks to Dr. V.S. Shevchenko for allocation of observing time. L. BERDNIKOV M. IBRAGIMOV Sternberg Astronomical Institute, Astronomical Institute, Tashkent, Moscow, Russia Republic of Uzbekistan University of Saratov, Saratov, Russia Reference: Berdnikov L.N., 1992, Pis`ma Astron. Zh., 18, 654 [BIBCODE 1992SvAL...18..259B ]