Ubv CCD Standards Near 5C1 Radio Sources at Intermediate Galactic Latitude-I.pdfVIP

UBV CCD standards near C radio sources at intermediate galactic latitude I 1 2 3 2 1 1 2 3 VMohan DKOjha OBienayme DCPaliwal AKPandey ACRobin 2 1 1 2 2 3 MChareton BCBhatt BBSanwal EOblak M Haywo o d and MCrez e 1 Uttar Pradesh State Observatory Manora Peak Nainital India 2 Observatoire de Besancon bis Av de lObservatoire BP F Besancon Cedex France 3 Observatoire de Strasbourg CNRS URA rue de lUniversit e F Strasbourg France Abstract Using CCD observations photometric magnitudes have b een ob tained in subelds in a direction at intermediate galactic latitude   2 l b in a deg area B and V magnitudes have b een obtained for a total of stars out of which for stars U magnitudes also have b een obtained The magnitude range covered is V and BV keywords CCD photometry calibration stellar p opulations Intro duction We are having an on going programme of star counts on Schmidt plates in a few selected directions in the Galaxy with an aim to study galactic stellar p opulations In order to calibrate Schmidt plates photometrically it is necessary to have a numb er of photometric standards which cover the entire range of magnitudes to b e studied on the plates As Schmidt plates cover a wide area of the sky the standards should also b e spread over the surface of the plate so as to minimise geometrical eects present on the plate This pap er is rst in a series of pap ers aimed at to provide pho