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Reverberation mapping of the Seyfert Zw I 1
We report results of the first reverberation mapping campaign of I Zwicky 1 during 2014-2016, which showed unambiguous reverberations of the broad H{beta} line emission in the... -
Stromgren photometry in M67
Precision CCD uvbyCaH{beta} photometry is presented of the old cluster, M67, covering one square degree with typical internal precision at the 0.005-0.020mag level to V~17. The... -
Southern reddened luminous stars. II.
H{beta} photometry is given for 263 reddened and very reddened stars from the Stephenson & Sanduleak (1971, Cat. ) catalogue of Luminous Stars in the Southern Milky Way... -
uvby{beta} photometry of h and chi Per
We present CCD uvby{beta} photometry for stars in the nuclei of the young double cluster {h} and {chi} Persei. We find that the reddening is highly variable through the {h} Per... -
uvby{beta} photometry of NGC 663
We present CCD uvby{beta} photometry for stars in the central area of the young open cluster NGC 663. We find that the reddening is highly variable, with values ranging from... -
UBV and H-beta in Sco-Cen association
As part of a thorough study of the luminosity function of Sco-Cen, UBV, and H_{beta} photometry has been acquired for a large number of mid B- to late A-type stars which are...
