J/MNRAS/122/363 Eggen PV photometry in NGC 7492 (Cuffey, 1961)
NGC 7492
Cuffey J.
<Mon. Not. R. Astron. Soc. 122, 363 (1961)>
=1961MNRAS.122..363C 1961MNRAS.122..363C
ADC_Keywords: Clusters, globular ; Photometry, Eggen
Abstract:
Photometry of NGC 7492, a very faint, well resolved cluster, shows
that it has a colour-magnitude relation similar in form to that of a
typical globular cluster. A well defined but sparsely populated red
giant branch is present, along with a horizontal branch, blue stars,
and variables. The distance modulus, 17.17, and the distance 27.2kpc.,
are obtained. The colour excess appears to be negligible. The
integrated photographic absolute magnitude is -4.84. The star density
in the cluster is unusually low, being approximately 0.06 stars per
cubic parsec for stars brighter than +2.5 absolute magnitude.
For a description of the PV photometric system, see e.g. GCPD/31
Objects:
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RA (2000) DE Designation(s)
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23 08 26.7 -15 36 41 NGC 7492
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 24 35 NGC 7492, standard stars
table4.dat 27 159 NGC 7492, catalogue of stars
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1 A1 --- Star Star designation (Cl* NGC 7492 C A in Simbad)
3- 7 F5.2 mag Pmag ? P magnitude (See GCPD/31)
8 A1 --- u_Pmag Uncertainty flag on Pmag
10- 14 F5.2 mag Vmag ? V magnitude (See GCPD/31)
15 A1 --- u_Vmag Uncertainty flag on Vmag
17- 21 F5.2 mag P-V ? P-V colour index (See GCPD/31)
22 A1 --- u_P-V Uncertainty flag on P-V
24 A1 --- Note [VD] D: double star, V: variable
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- Region Region in finding chart, SnRn (1)
6- 7 I2 --- Star Star number in the region (2)
8 A1 --- m_Star Multiplicity index on Star
11- 15 F5.2 mag Pmag P magnitude (See GCPD/31)
17- 21 F5.2 mag Vmag V magnitude (See GCPD/31)
23- 27 F5.2 mag P-V P-V colour index (See GCPD/31)
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Note (1): S for Sector, R for Ring
Note (2): In Simbad, Cl* NGC 7492 C N-N-NN (S1R1 1 = Cl* NGC 7492 C 1-1-1)
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History: Prepared via OCR at CDS.
(End) Marie-Jose Wagner, Patricia Bauer [CDS] 23-Mar-1999