J/PASP/127/31 CCD photometry of NGC 2482 (Krisciunas+, 2015)
CCD photometry of NGC 2482 and five previously unobserved open star clusters.
Krisciunas K., Monteiro H., Dias W.
<Publ. Astron. Soc. Pac., 127, 31-50 (2015)>
=2015PASP..127...31K 2015PASP..127...31K
ADC_Keywords: Clusters, open ; Photometry, CCD
Abstract:
We present BV and u'g'r'i' CCD photometry of the central
region of NGC 2482. We also present BVu'g' CCD photometry of five
clusters that have been poorly studied in the past: Ruprecht 42,
Ruprecht 51, Ruprecht 153, Ruprecht 154, and AH03 J0748-26.9, which
to our knowledge has not been studied before. Using a global
optimization technique that eliminates much of the subjectivity
previously inherent in main-sequence fitting studies, we obtain values
of the distances, ages, and metallicities of the clusters, with robust
estimates of the uncertainties of these fundamental parameters. Four
of our clusters are less than ∼1.3kpc beyond the Sun's distance
from the Galactic center and have essentially solar metallicity. The
metallicities of those clusters more distant from the Galactic center
are consistent with a 0.3dex step to lower [Fe/H] found in other
studies.
Description:
The data presented in this article were obtained by one of us (KK) at
Las Campanas Observatory (LCO) using the 1 m Henrietta Swope
telescope. Three second exposures of NGC 2482 were obtained in BVgri
on 2012 January 6 (UT), along with a 24 s u-band exposure. Longer BV
exposures of 150 and 120s, respectively, were taken on 2012 December
21 (UT). For the NGC 2482 images, we used the central 1201x1201 pixels
of the CCD chip then in use. The pixel scale is 0.435"; the field size
is 8.7' by 8.7'.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 102 114 Photometry of NCG 2482 Central Region
table3.dat 14 19 NGC 2482 cross-identifications
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1 I1 h RAh Right ascension (J2000)
3- 4 I2 min RAm Right ascension (J2000)
6- 10 F5.2 s RAs Right ascension (J2000)
12 A1 --- DE- Declination sign (J2000)
13- 14 I2 deg DEd Declination (J2000)
16- 17 I2 arcmin DEm Declination (J2000)
19- 22 F4.1 arcsec DEs Declination (J2000)
24- 29 F6.3 mag Vmag V magnitude
31- 35 F5.3 mag e_Vmag rms uncertainty on Vmag (1)
37- 41 F5.3 mag B-V B-V colour index
43- 47 F5.3 mag e_B-V rms uncertainty on B-V (1)
49- 53 F5.3 mag u'-g' u'-g' colour index
55- 59 F5.3 mag e_u'-g' rms uncertainty on u'-g' (1)
61- 66 F6.3 mag r'mag r' magnitude
68- 72 F5.3 mag e_r'mag rms uncertainty on r'mag (1)
74- 79 F6.3 mag g'-r' g'-r' colour index
81- 85 F5.3 mag e_g'-r' rms uncertainty on g'-r' (1)
87- 92 F6.3 mag r'-i' r'-i' colour index
94- 98 F5.3 mag e_r'-i' rms uncertainty on r'-i' (1)
100-102 I3 --- ID [5/283] ID number, <[KMD2015] NNN> in Simbad
--------------------------------------------------------------------------------
Note (1): 1σ random errors, including uncertainty of nightly fit to
standards.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- IDM ID in Moffat & Vogt (1975A&AS...20...85M 1975A&AS...20...85M),
in Simbad
4- 6 I3 --- ID ID in Table 2
7 A1 --- --- [/]
8- 10 I3 --- ID2 ? Second ID of table 2
12- 14 A3 --- LC Luminosity class (1)
--------------------------------------------------------------------------------
Note (1): Luminosity class is from Moffat & Vogt (1975A&AS...20...85M 1975A&AS...20...85M).
Two of their stars (#17 and #20) are composed of two components, abd
their star #35 is erroneously designated a non-member. Classes are:
V = main sequence
III = giant
n = noncluster member
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 23-Mar-2015