J/AJ/170/164 TUBITAK UBV Photometry: Czernik 41 & NGC 1342 (Tanik Ozturk+, 2025)
A comprehensive study of Czernik 41 and NGC 1342 using CCD UBV and Gaia DR3
data.
Tanik Ozturk B., Bilir S., Yontan T., Plevne O., Ak T., Ak S., Canbay R.,
Banks T.
<Astron. J., 170, 164 (2025)>
=2025AJ....170..164T 2025AJ....170..164T
ADC_Keywords: Clusters, open; Photometry, UBV; Optical; Proper motions;
Parallaxes, trigonometric; Colors
Keywords: Open star clusters ; Hertzsprung Russell diagram ; Galaxy disks ;
Galaxy kinematics
Abstract:
In this study, the structural, astrophysical, kinematic, and Galactic
orbital parameters of the open clusters Czernik 41 and NGC 1342, as
well as their dynamical evolution, are investigated using CCD UBV
photometry and Gaia data. By applying the UPMASK algorithm to Gaia
astrometric data for the estimation of cluster membership
probabilities, we have determined that 382 stars in Czernik 41 and 111
stars in NGC 1342 exhibit the highest statistical likelihood of being
cluster members. Fundamental parameters (including reddening,
metallicity, distance, and age) were derived using both classical
methods, where parameters are determined separately, and Markov Chain
Monte Carlo methods, where parameters are estimated simultaneously.
The results obtained from both approaches are in agreement, confirming
the reliability of the derived parameters and demonstrating their
robustness against potential degeneracies. The distances to Czernik 41
and NGC 1342 were determined as 2485±151pc and 645±42pc,
respectively, while their ages were estimated to be 69±10Myr and
1000±50Myr. The metallicity values ([Fe/H]) were found to be
0.07±0.09dex for Czernik 41 and -0.14±0.07dex for NGC 1342. The
stellar mass functions for both clusters were derived, yielding slopes
of Γ=1.67±0.23 for Czernik 41 and Γ=1.56±0.41 for NGC
1342. A kinematic orbit analysis indicates that Czernik 41 originated
within the solar circle, whereas NGC 1342 formed outside it.
Description:
he CCD UBV photometric observations for the OCs Czernik 41 and
NGC 1342 were conducted on 2020 July 21 and 2019 September 29,
respectively. These observations utilized the 100cm f/10
Ritchey-Chretien telescope (T100) at the TUBITAK National
Observatory (TUG) in Turkey. Exposure times were between 2s and
1800s, allowing us to study both bright and faint stars, and the field
of view was 21.5'x21.5'.
The relevant catalog for Czernik 41 contains data for 2,527 stars,
while the catalog for NGC 1342 includes 906 stars. To further
characterize these clusters, catalogs based on Gaia DR3 data (I/355)
were compiled, with 217,879 stars for Czernick 41 and 20,820 stars for
NGC 1342.
Objects:
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RA (2000) DE Designation(s)
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19 51 01.00 +25 17 24.0 Czernik 41 = Cl Czernik 41
03 31 34.60 +37 22 48.0 NGC 1342 = C 0328+371
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table5.dat 154 3433 Catalogs for Czernik 41 and NGC 1342
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See also:
I/289 : UCAC2 Catalogue (Zacharias+ 2004)
I/317 : The PPMXL Catalog (Roeser+ 2010)
I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)
I/352 : Distances to 1.47 billion stars in Gaia EDR3 (Bailer-Jones+, 2021)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
VI/137 : GaiaSimu Universe Model Snapshot (Robin+, 2012)
J/AJ/115/592 : VI photometry of NGC 2157 (Fischer+, 1998)
J/A+AS/141/491 : Chemical composition of halo and disk stars (Nissen+, 2000)
J/AJ/131/414 : Structural parameters of SMC star clusters (Hill+, 2006)
J/A+A/485/303 : Radial velocities for 1309 stars & 166 OCl (Mermilliod+, 2008)
J/A+A/488/943 : Abundances of giants in 4 Galactic clusters (Sestito+, 2008)
J/AJ/137/4186 : UBVRI standards around celestial equator (Landolt, 2009)
J/A+A/543/A156 : Milky Way global survey of star clusters (Kharchenko+, 2012)
J/AJ/145/7 : UBVRI CCD phot. of the open cluster NGC 6811 (Janes+, 2013)
J/A+A/558/A53 : Milky Way global survey of star clust. II. (Kharchenko+, 2013)
J/A+A/564/A79 : Proper motions of open clusters from UCAC4 (Dias+, 2014)
J/MNRAS/453/1095 : NGC 6866 UBVRI photometry (Bostanci+, 2015)
J/other/ApSS/355.267 : NGC 6811 CCD UBVRI photometry (Yontan+, 2015)
J/other/ApSS/361.126 : NGC 6819 CCD UBV photometry (Ak+, 2016)
J/other/ASpR/58.1900 : NGC 225 CCD UBV photometry (Bilir+, 2016)
J/other/ApSS/361.126 : NGC 6819 CCD UBV photometry (Ak+, 2016)
J/AJ/153/99 : Gal. outer disk: a field toward Tombaugh 1 (Carraro+, 2017)
J/A+A/600/A106 : RAVE open cluster pairs, groups and complexes (Conrad+, 2017)
J/other/AstBu/72.257 : Homogeneous Cat. of Open Cluster Param. (Loktin+, 2017)
J/A+A/618/A93 : Gaia DR2 open clust. in the Milky Way (Cantat-Gaudin+, 2018)
J/MNRAS/479/5491 : Absolute parameters of 509 main-sequence stars (Eker+, 2018)
J/A+A/619/A155 : Open cluster kinematics with Gaia DR2 (Soubiran+, 2018)
J/A+A/618/A93 : Gaia DR2 open clust. in the Milky Way (Cantat-Gaudin+, 2018)
J/ApJS/245/32 : Newly identified star clusters in Gaia DR2 (Liu+, 2019)
J/A+A/633/A99 : Gaia DR2 open clust. in the MW. II (Cantat-Gaudin+, 2020)
J/A+A/640/A1 : Portrait Galactic disc (Cantat-Gaudin+, 2020)
J/MNRAS/496/3887 : Bolometric correction for nearby MS stars (Eker+, 2020)
J/MNRAS/494/4713 : Study of NGC 381, NGC 2360 and Berkeley 68 (Maurya+, 2020)
J/A+A/640/A127 : Open cluster properties with Gaia and LAMOST (Zhong+, 2020)
J/other/ApSS/366.68 : Czernik 2 & NGC 7554 CCD UBV photometry (Akbulut+, 2021)
J/MNRAS/504/356 : Updated parameters of 1743 open clusters (Dias+, 2021)
J/A+A/652/A102 : 3794 open clusters parameters (Hao+, 2021)
J/MNRAS/505/1342 : Study of Cepheids in open clusters (Medina+, 2021)
J/A+A/647/A19 : 3D Kinematics and age of OCs (Tarricq+, 2021)
J/AN/342/538 : Frolov 1 and NGC 7510 CCD UBV photometry (Yontan+, 2021)
J/A+A/668/A4 : LAMOST open clusters (Fu+, 2022)
J/A+A/668/A13 : Open clusters housing classical Cepheids (Hao+, 2022)
J/AJ/163/191 : Photometry & astrometry in NGC 1664 and NGC 6939 (Koc+, 2022)
J/MNRAS/509/421 : Gal. metallicity gradient with open clusters (Netopil+ 2022)
J/AJ/166/263 : UBV & Gaia DR3 phot. of King 6 and NGC 1605 (Gokmen+, 2023)
J/AJ/165/79 : Catalogs for Berkeley 68 and Stock 20 (Yontan, 2023)
J/AJ/170/149 : TUBITAK UBV Phot. of Roslund 3 & Ruprecht 174 (Karagoz+, 2025)
Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Cluster Name of open cluster (1)
12- 15 I4 --- ID [1/2527] Identifier
17- 27 F11.7 deg RAdeg Right ascension (J2000)
29- 38 F10.7 deg DEdeg Declination (J2000)
40- 45 F6.3 mag Vmag [8.4/22.2] Apparent V-band magnitude
47- 51 F5.3 mag e_Vmag [1e-3/0.2] Uncertainty in Vmag
53- 58 F6.3 mag U-B [-2.2/3.2]? U-B color
60- 64 F5.3 mag e_U-B [1e-3/1.1]? Uncertainty in U-B
66- 71 F6.3 mag B-V [-0.04/4.6]? B-V color
73- 77 F5.3 mag e_B-V [1e-3/0.8]? Uncertainty in B-V
79- 84 F6.3 mag Gmag [8.3/21.7] Apparent Gaia DR3 (I/355) G-band
magnitude
86- 90 F5.3 mag e_Gmag [3e-3/0.05] Uncertainty in Gmag
92- 98 F7.3 mag BP-RP [-96/6.9]? Gaia DR3 GBP-GRP color
100- 106 F7.3 mag e_BP-RP [5e-3/138.6]? Uncertainty in GBP-GRP
108- 115 F8.3 mas/yr pmRA [-126.7/58.5]? Proper motion in direction of
right ascension
117- 121 F5.3 mas/yr e_pmRA [0.01/2.2]? Uncertainty in pmRA
123- 129 F7.3 mas/yr pmDE [-39.9/197]? Proper motion in direction of
declination
131- 135 F5.3 mas/yr e_pmDE [7e-3/1.4]? Uncertainty in pmDE
137- 142 F6.3 mas plx [-8.4/13.1]? Parallax
144- 148 F5.3 mas e_plx [0.01/2.5]? Uncertainty in plx
150- 154 F5.3 --- Prob [0/1] Membership probability
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Note (1): Clusters as follows:
Czernik 41 = 2527 occurrences
NGC 1342 = 906 occurrences
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History:
From electronic version of the journal
License: CC-BY-4.0
(End) Prepared by [AAS], Robin Leichtnam [CDS] 02-Jul-2026