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J/A+AS/106/573 NGC4815 BV photometry (Carraro+, 1994)
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Deep CCD BV photometry of the poorly studied open cluster NGC 4815
Carraro G., Ortolani S.
<Astron. Astrophys. Suppl. Ser. 106, 573 (1994)>
=1994A&AS..106..573C (SIMBAD/NED Reference)
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ADC_Keywords:Clusters, open; Photometry
Keywords: open clusters: NGC 4815 - HR diagram - luminosity function
Abstract:
We report BV Johnson CCD photometry of 2498 stars in the region of the
poorly studied open cluster NGC 4815. This object appears in the Janes
(1988) list of possible old open clusters. NGC 4815 lies in the galactic
plane, in a region of strong absorption. The color magnitude diagram (CMD)
we derive shows that NGC 4815 has about the Hyades age (5x10^8^yr) and a
probable lower than solar metal abundance. The color excess E_B-V_ and the
distance modulus (m-M) turn out to be 0.70 and 14.10, respectively.
Accordingly a distance of 2.5 Kpc from the Sun is derived. The luminosity
function (LF) we obtain for the main sequence (MS) stars is consistent with
a Salpeter (x=1.55) initial mass function (IMF).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2 64 2498 Photometric data for NGC 4815
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Byte-by-byte Description of file: table2
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Bytes Format Units Label Explanations
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6- 9 I4 --- N Identification number
14- 20 F7.2 --- X X coordinate
25- 31 F7.2 --- Y Y coordinate
37- 42 F6.3 mag V V magnitude
48- 53 F6.3 mag B-V B-V color
60- 64 F5.3 mag e_B-V rms uncertainty on B-V
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(End) Patricia Bauer [CDS] 22-Apr-1994