J/A+A/325/987 UBV magnitude of NGC 884 B-type pulsators (Krzesinski+ 1997)
B-type pulsators in the open cluster NGC 884 (χ Persei)
Krzesinski J., Pigulski A.
<Astron. Astrophys. 325, 987 (1997)>
=1997A&A...325..987K 1997A&A...325..987K (SIMBAD/NED BibCode)
ADC_Keywords: Stars, Be ; Photometry, UBV ; Clusters, open
Keywords: stars: oscillations - stars: Be - stars: variables: β Cephei -
open clusters and associations: individual: NGC 884 = (χ Per)
Description:
We present the results of the photometric CCD search for B-type
pulsators in the central region of Chi Persei (NGC 884) open cluster.
In addition to the two newly-discovered Beta Cephei stars we found 11
other variables in the observed field. The photometric data for them
are given in the file 'bmag' and 'vmag' for B and V-filter data,
respectively. In addition, we present the new UBV magnitudes for stars
in the observed field. This is Table 4 of the paper, available only in
electronic form.
Objects:
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RA (2000) DE Designation(s)
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02 22 02.7 +57 08 25 Oo 2246 = NGC 884 2246 = BD+56 572
02 22 08.5 +57 07 28 Oo 2299 = NGC 884 2299 = BD+56 575
02 21 43.4 +57 07 32 Oo 2088 = NGC 884 2088 = V506 Per
02 21 49.9 +57 07 05 Oo 2140 = NGC 884 2140
02 21 53.1 +57 09 57 Oo 2165 = NGC 884 2165 = V507 Per
02 22 00.5 +57 08 43 Oo 2227 = NGC 884 2227 = HD 14443
02 22 02.5 +57 09 20 Oo 2242 = NGC 884 2242
02 22 09.0 +57 07 24 Oo 2301 = NGC 884 2301
02 22 09.6 +57 07 02 Oo 2311 = NGC 884 2311 = BD+56 576
02 22 17.6 +57 07 25 Oo 2371 = NGC 884 2371 = BD+56 578
02 22 24.2 +57 06 34 Oo 2417 = NGC 884 2417 = HD 14488
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
umag 78 18 U-filter photometry of variable stars
bmag 78 1201 B-filter photometry of variable stars
vmag 78 1189 V-filter photometry of variable stars
table4.dat 42 109 UBV photometry of stars in the observed field
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Byte-by-byte Description of file: bmag umag vmag
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Bytes Format Units Label Explanations
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1- 12 F12.4 d HJD Heliocentric Julian day
14- 18 F5.3 mag Oo2246 ? Differential magnitude for Oo 2246, (1)
20- 24 F5.3 mag Oo2299 Differential magnitude for Oo 2299, (1)
26- 30 F5.3 mag Oo2088 Differential magnitude for Oo 2088, (1)
32- 36 F5.3 mag Oo2140 ? Differential magnitude for Oo 2140, (1)
38- 42 F5.3 mag Oo2165 ? Differential magnitude for Oo 2165, (1)
44- 48 F5.3 mag Oo2227 ? Differential magnitude for Oo 2227, (1)
50- 54 F5.3 mag Oo2242 ? Differential magnitude for Oo 2242, (1)
56- 60 F5.3 mag Oo2301 ? Differential magnitude for Oo 2301, (1)
62- 66 F5.3 mag Oo2311 ? Differential magnitude for Oo 2311, (1)
68- 72 F5.3 mag Oo2371 ? Differential magnitude for Oo 2371, (1)
74- 78 F5.3 mag Oo2417 Differential magnitude for Oo 2417, (1)
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Note (1): All magnitude are differential magnitudes in the sense of variable
minus comparison, where in all cases the comparison star is the mean
magnitude of two comparison stars, Oo 2235 and Oo 2296.
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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- 6 F6.1 pix Xpos X coordinate of a star (as in Fig.1)
7- 13 F7.1 pix Ypos Y coordinate of a star (as in Fig.1)
14- 21 A8 --- Name Star designation, see Note (1)
22- 28 F7.2 mag Vmag V magnitude, see Note (2)
29- 35 F7.2 mag B-V B-V colour index, see Note (2)
36- 42 F7.2 --- U-B ? U-B colour index, see Note (2)
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Note (1): Star numbers are according to Oosterhoff (1937AnLei..17a...1O 1937AnLei..17a...1O)
except for those preceded by 'W' or 'VM' for which the designations
were taken from Wildey (1964ApJ...139..435W 1964ApJ...139..435W) and Vogt & Moffat
(1974VeBoc...2....1V 1974VeBoc...2....1V), respectively.
Note (2): For variable stars we use the following rules in listing their
UBV magnitudes: for periodic variables (Oo 2246, 2299, 2371) we list
the mean magnitudes, while for the eclipsing binaries (Oo 2301 and
2311) the magnitudes at the phase of maximum light are given. For the
remaining 6 variables we give the UBV magnitudes at one, arbitrarily
chosen epoch, HJD 2450163.338, i.e., the middle of the night March
19/20, 1996.
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Acknowledgements: Andrzej Pigulski,
References:
Oosterhoff P.T, Ann. Sternw. Leiden, 17, part no 1, 1 =1937AnLei..17a...1O 1937AnLei..17a...1O
(End) Patricia Bauer [CDS] 16-Oct-1997