J/AcA/59/349 NGC 1502 UBVIc photometry (Michalska+, 2009)
A CCD search for variable stars of spectral type B in the northern hemisphere
open clusters. VII. NGC 1502.
Michalska G., Pigulski A., Steslicki M., Narwid A.
<Acta Astron., 59, 349-370 (2009)>
=2009AcA....59..349M 2009AcA....59..349M
ADC_Keywords: Clusters, open ; Stars, variable ; Photometry, UBVRI
Keywords: stars: early-type - stars: emission-line, Be -
open clusters and associations: individual: NGC 1502
Abstract:
We present results of variability search in the field of the young
open cluster NGC 1502. Eight variable stars were discovered. Of six
other stars in the observed field that were suspected for variability,
we confirm variability of two, including one beta Cep star,
NGC 1502-26. The remaining four suspects were found to be constant in
our photometry. In addition, UBVIc photometry of the well-known
massive eclipsing binary SZ Cam was obtained.
Description:
All observations of NGC 1502 were carried out at Bialkow, a station of
University of Wroclaw, with a 60-cm Cassegrain telescope. During the
first observing run, we acquired observations on 22 nights between
August 22, 2004 and April 20, 2005.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 81 11 The variable stars in NGC 1502
table4.dat 208 191 UBVIc and Hα photometry and coordinates of
stars in the field of NGC 1502
lc/* . 44 Individual light curves of the 11 variables
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See also:
J/AJ/114/222 : Cross identifications in NGC 1502 (Weitenbeck 1997)
J/A+A/443/157 : CCD photometry in 6 open clusters (Paunzen+, 2005)
J/AcA/58/41 : ISM polarization towards NGC 1502 (Weitenbeck+, 2008)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- Name Star designation
4- 8 F5.2 mag Vmag Johnson V magnitude
10- 13 F4.2 mag V-Ic Johnson-Cousins V-I colour index
15- 19 F5.3 mag Vamp ? Amplitude of variation in V band
21- 25 F5.3 mag Iamp Amplitude of variation in Ic band
27- 36 F10.8 d Per ? Period
38- 42 I5 10-8d e_Per ? rms uncertainty on Per
44 I1 h RAh Right ascension (J2000)
46- 47 I2 min RAm Right ascension (J2000)
49- 53 F5.2 s RAs Right ascension (J2000)
55 A1 --- DE- Declination sign (J2000)
56- 57 I2 deg DEd Declination (J2000)
59- 60 I2 arcmin DEm Declination (J2000)
62- 65 F4.1 arcsec DEs Declination (J2000)
67- 79 A13 --- SName Simbad name
81 I1 --- lc Code for light curves availability,
in lc subdirectory (1)
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Note (1): Code as follows:
1 = U band (NEW), B band (NEW), V band (OLD, NEW), I band (OLD, NEW)
2 = B band (NEW), V band (OLD, NEW), I band (OLD, NEW)
3 = B band (NEW), V band (NEW), I band (NEW)
4 = V band (NEW), I band (NEW)
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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 I4 --- WEBDA ?=- WEBDA number
6- 7 I2 h RAh Right ascension (J2000)
9- 10 I2 min RAm Right ascension (J2000)
12- 16 F5.2 s RAs Right ascension (J2000)
18 A1 --- DE- Declination sign (J2000)
19- 20 I2 deg DEd Declination (J2000)
22- 23 I2 arcmin DEm Declination (J2000)
25- 28 F4.1 arcsec DEs Declination (J2000)
30- 36 F7.4 mag Vmag Johnson V magnitude
38- 43 F6.4 mag e_Vmag rms uncertainty on Vmag (1)
45- 50 F6.4 mag E_Vmag rms uncertainty on Vmag,
transformation errors included (1)
52- 58 F7.4 mag V-Ic Johnson-Cousins V-I colour index
60- 65 F6.4 mag e_V-Ic rms uncertainty on V-Ic (1)
67- 72 F6.4 mag E_V-Ic rms uncertainty on V-Ic,
transformation errors included (1)
74- 80 F7.4 mag B-V ?=- Johnson B-V colour index
82- 87 F6.4 mag e_B-V ?=- rms uncertainty on B-V (1)
89- 94 F6.4 mag E_B-V ?=- rms uncertainty on B-V,
transformation errors included (1)
96-102 F7.4 mag U-B ?=- Johnson U-B colour index
104-109 F6.4 mag e_U-B ?=- rms uncertainty on U-B (1)
111-116 F6.4 mag E_U-B ?=- rms uncertainty on U-B,
transformation errors included (1)
118-124 F7.4 mag alpha ?=- α index (with narrow and wide filters
centered on Hα, widthe 3 and 20nm)
126-131 F6.4 mag e_alpha ?=- rms uncertainty on alpha
133-134 I2 --- Zug ?=- Identification according to Zug
(1933LicOB..16..119Z 1933LicOB..16..119Z)
136-137 A2 --- Pur Identification according to Purgathofer
(1964AnWie..26...37P 1964AnWie..26...37P)
139-140 I2 --- Hpe ?=- Identification according to Hoag et al.
(1961PUSNO..17..343H 1961PUSNO..17..343H), photoelectric sequence
142-143 I2 --- Hpg ?=- Identification according to Hoag et al.
(1961PUSNO..17..343H 1961PUSNO..17..343H), photographic sequence
145-146 I2 --- DH ?=- Identification according to Dombrovskii &
Hagen-Thorn (1964TrLen..20...75D 1964TrLen..20...75D)
148 A1 --- --- [:]
149-151 A3 --- Tap Identification according to Tapia et al.
(1991MNRAS.253..649T 1991MNRAS.253..649T)
153-208 A56 --- Notes Notes
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Note (1): We provide two different estimates of errors. The first one is
calculated as an r.m.s. error of a mean of differential magnitudes
and does not include the errors of the transformation to the standard
system. Because differential magnitudes were calculated with W30 as a
comparison star, this error for W30 equals to zero. Note that these
errors show the internal precision of our photometry. The other error
includes the errors of the transformation coefficients.
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Byte-by-byte Description of file: lc/*
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Bytes Format Units Label Explanations
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1- 10 F10.5 d HJD Heliocentric Julian Day, (HJD-2453000)
12- 18 F7.4 mag Dmag Differential magnitude
21- 26 F6.4 mag e_Dmag Error of magnitude (as calculated by Daophot)
29- 33 F5.3 --- airM Air mass
35- 37 I3 --- Navg ? Number of averaged data points
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History:
From electronic version of the journal
References:
Jerzykiewicz et al., Paper I 1996AcA....46..253J 1996AcA....46..253J
Pigulski et al., Paper II 1997AcA....47..365P 1997AcA....47..365P
Pigulski et al., Paper III 2000AcA....50..113P 2000AcA....50..113P
Pigulski et al., Paper IV 2001AcA....51..159P 2001AcA....51..159P
Jerzykiewicz et al., Paper V 2003AcA....53..151J 2003AcA....53..151J
Kolaczkowski et al., Paper VI 2004AcA....54...33K 2004AcA....54...33K
(End) Patricia Vannier [CDS] 12-Jul-2010