Browsing by Author "Richtler, T"

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A study of the old galactic star cluster Berkeley 32

Richtler, T; Sagar, R (Astronomical Society of India, 2001)

We present new CCD photometry of the distant old open star cluster Berkeley 32 in Johnson V and Cousins I passbands. A total of ~ 3200 stars have been observed in a field of about 13? x 13?. The colour-magnitude diagram ...
V, I CCD photometry of metal-rich bulge globular clusters: NGC 6553

Sagar, R; Subramaniam, A; Richtler, T; Grebel, E. K (The European Southern Observatory, 1999-03)

We have carried out VI CCD photometry of about 40 000 stars down to V ~ 23 mag in an area of about 6' x 10' centered on the metal-rich Galactic bulge globular cluster NGC 6553 and an adjacent field region. Our photometry ...
VI CCD photometry of metal-rich globular clusters: NGC 6528

Richtler, T; Grebel, E. K; Subramaniam, A; Sagar, R (European Southern Observatory, 1998-01)

We present CCD photometry in V and I for the metal-rich globular cluster NGC 6528. A comparison with previous photometry reveals discrepancies of the order 0.1 to 0.2 mag in V, emphasizing the need for independent photometry. ...

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