J/AJ/159/95 IC 1369 Vilnius photometry and Gaia DR2 astrometry (Straizys+, 2020)
Open cluster IC 1369 and its vicinity: multicolor photometry and Gaia DR2
astrometry.
Straizys V., Boyle R.P., Raudeliunas S., Zdanavicius J., Janusz R.,
Macijauskas M., Lazauskaite R., Cernis K., Zdanavicius K., Maskoliunas M.,
Cepas V., Kazlauskas A.
<Astron. J., 159, 95 (2020)>
=2020AJ....159...95S 2020AJ....159...95S
ADC_Keywords: Clusters, open; Photometry, Vilnius; Spectral types
Keywords: Open star clusters ; Stellar classification ;
Hertzsprung Russell diagram ; Interstellar dust extinction
Abstract:
The open cluster IC1369, located in Cygnus close to the galactic
equator at the 89.6° longitude, and its vicinity are investigated
by applying two-dimensional photometric classification of stars down
to V=19mag measured in the Vilnius seven-color photometric system.
Employing the Gaia DR2 coordinates, parallaxes, and proper motions,
143 cluster members are found having cluster membership probabilities
≥0.75. The hottest stars of the evolved main sequence are of spectral
class B9. Distances to the cluster, determined by two methods based on
the Gaia parallaxes, are 3280 and 3370pc with an uncertainty of
400-500pc. Employing the physical HR diagram with the coordinates
logL/L☉ versus logTeff and the Padova isochrones, the cluster
age is found to be between 300 and 350Myr. Among the cluster members
we identified six red giants of spectral classes G5-G8 and
luminosities II-III, 17 Am stars, one Ap star, and one B5 blue
straggler. The extinction shows a steep rise up to ∼2.0mag at
300-700pc, caused by the extensions of the dust cloud LDN970 and the
Great Cygnus Rift, and up to ∼2.5mag at the edge of the Perseus arm at
3.0kpc. The extinction is almost constant between 0.9 and 2.5kpc from
the Sun. The average extinction of the cluster members is 2.54mag. A
systematic error of color excesses found in the Argonaut calculator
results is discussed.
Description:
The investigated 13'x13' area is centered on the cluster IC1369 and it
covers the whole cluster whose size is about 7'x9'. CCD exposures of
different durations with the filters of the Vilnius system were
obtained on 2014 November 19-23 with the 1.8m Vatican Advanced
Technology Telescope (VATT) on Mt. Graham, Arizona.
The exposure lengths were from 10 to 1200s in the visible passbands
and from 50 to 1500s in the ultraviolet passbands.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 123 2694 The catalog of 2694 stars in the IC1369 area with
the results of CCD photometry and photometric
spectral types
table2.dat 118 143 The list of IC1369 members with their
classification and intrinsic parameters
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See also:
I/347 : Distances to 1.33 billion stars in Gaia DR2 (Bailer-Jones+, 2018)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
J/A+AS/109/375 : Blue stragglers in open clusters (Ahumada+, 1995)
J/A+AS/113/325 : Distance measurements of Lynds Nebulae (Hilton+, 1995)
J/ApJ/469/355 : Teff, B-V and BC relation (Flower, 1996)
J/BaltA/7/369 : M67 CCD photometry (Boyle+, 1998)
J/BaltA/13/1 : M67 CCD Vilnius photometry (Laugalys+, 2004)
J/AN/326/3 : BVRI photometry of 4 open clusters (Ahumada+, 2005)
J/A+A/463/789 : Blue stragglers in open clusters (Ahumada+, 2007)
J/A+A/464/573 : VI photometry of 5 open clusters (Carraro+, 2007)
J/BaltA/19/197 : King 7 Vilnius photometry (Zdanavicius+, 2010)
J/AJ/141/92 : BVI photometry of 10 distant open clusters (Janes+, 2011)
J/A+A/544/A49 : Vilnius photometry in North Ecliptic Pole (Zdanavicius+, 2012)
J/A+A/558/A53 : Milky Way survey of star clusters. II. (Kharchenko+, 2013)
J/A+A/554/A3 : Vilnius photometry of IC1805 stars (Straizys+, 2013)
J/BaltA/22/181 : Vilnius photometry of M29 (NGC6913) (Milasius+, 2013)
J/PASP/127/31 : CCD photometry of NGC 2482 (Krisciunas+, 2015)
J/ApJ/823/114 : The Cannon: a new approach to determine masses (Ness+, 2016)
J/A+A/585/A31 : Vilnius photometry of TGU H994 P1 (Straizys+, 2016)
J/A+A/618/A93 : Gaia DR2 open clusters in the Milky Way (Cantat-Gaudin+, 2018)
J/A+A/611/A9 : LDN 183 and LDN 169 Vilnius photometry (Straizys+, 2018)
J/A+A/623/A108 : Age of 269 GDR2 open clusters (Bossini+, 2019)
J/A+A/625/A135 : Galac. interstellar dust Gaia-2MASS 3D maps (Lallement+, 2019)
J/A+A/623/A22 : IC 4996 Vilnius phot. and Gaia DR2 astrometry (Straizys+,2019)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- Seq [1/2694] Sequential number
6- 7 I2 h RAh [21] Hour of Right Ascension (J2000)
9- 10 I2 min RAm [11/12] Minute of Right Ascension (J2000)
12- 16 F5.2 s RAs Second of Right Ascension (J2000)
18 A1 --- DE- [+] Sign of the Declination (J2000)
19- 20 I2 deg DEd [47] Degree of Declination (J2000)
22- 23 I2 arcmin DEm [39/52] Arcminute of Declination (J2000)
25- 28 F4.1 arcsec DEs Arcsecond of Declination (J2000)
30- 35 F6.3 mag Vmag [10.2/20.5] V magnitude (Vilnius system)
37- 41 F5.3 mag U-V [1.8/6.9]? U-V colour index (Vilnius system)
43- 47 F5.3 mag P-V [1.5/6.6]? P-V colour index (Vilnius system)
49- 53 F5.3 mag X-V [0.8/5.1] X-V colour index (Vilnius system)
55- 59 F5.3 mag Y-V [0.15/2.5] Y-V colour index (Vilnius system)
61- 65 F5.3 mag Z-V [0.19/0.82] Z-V colour index (Vilnius system)
67- 71 F5.3 mag V-S [0.33/2.5]? V-S colour index (Vilnius system)
73- 77 F5.3 mag e_Vmag [0.009/0.15] Error of V magnitude (Vilnius
system)
79- 83 F5.3 mag e_U-V [0.01/0.26]? Error of U-V colour index (Vilnius
system)
85- 89 F5.3 mag e_P-V [0.01/0.23]? Error of P-V colour index (Vilnius
system)
91- 95 F5.3 mag e_X-V [0.01/0.24] Error of X-V colour index (Vilnius
system)
97-101 F5.3 mag e_Y-V [0.01/0.23] Error of Y-V colour index (Vilnius
system)
103-107 F5.3 mag e_Z-V [0.01/0.22] Error of Z-V colour index (Vilnius
system)
109-113 F5.3 mag e_V-S [0.02/0.21]? Error of V-S colour index (Vilnius
system)
115-123 A9 --- SpType Photometric MK spectral type (in lower case
letters) if any
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- Seq [603/2285] Sequential number
6- 7 I2 h RAh [21] Hour of Right Ascension (J2000)
9- 10 I2 min RAm [11/12] Minute of Right Ascension (J2000)
12- 16 F5.2 s RAs Second of Right Ascension (J2000)
18 A1 --- DE- [+] Sign of the Declination (J2000)
19- 20 I2 deg DEd [47] Degree of Declination (J2000)
22- 23 I2 arcmin DEm [42/51] Arcminute of Declination (J2000)
25- 28 F4.1 arcsec DEs Arcsecond of Declination (J2000)
30- 35 F6.3 mag Vmag [12.7/18.8] V magnitude (Vilnius system)
37- 47 A11 --- SpType Photometric MK spectral type (in lower case
letters) if any
49- 52 F4.2 mag Av [1.9/3.3]? Interstellar extinction in the
V band
54- 57 F4.2 mag (Y-V)0 [0.1/0.72]? Intrinsic (Y-V) colour index
(Vilnius system)
59- 63 F5.2 mag Vmag0 [10.1/16.6]? Vmag-Av (Vilnius system)
65- 69 F5.3 mag BC [0.33/3]? Bolometric correction
71- 75 F5.3 [K] logTeff [3.6/4.2]? Log of effective temperature
of the star
77- 82 F6.3 [Lsun] logL [-1.3/0.04]? Log of luminosity of the star
84- 89 F6.3 mas/yr pmRA [-5.1/-4.2] Gaia DR2 (I/345) proper motion
in right ascension (pmRA*cosDE)
91- 95 F5.3 mas/yr e_pmRA [0.03/0.26] Standard error of proper motion
in right ascension direction
97-102 F6.3 mas/yr pmDE [-6/-5.2] Gaia DR2 (I/345) proper motion
in declination direction
104-108 F5.3 mas/yr e_pmDE [0.03/0.26] Standard error of proper motion
in declination
110-113 I4 pc Dist [2258/4748] Distance of the star from
Bailer-Jones+, 2018, I/347
115-118 F4.2 --- PMm [0.75/0.99] Probability of membership
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History:
From electronic version of the journal
References:
Straizys et al. IC 1805. 2013A&A...554A...3S 2013A&A...554A...3S Cat. J/A+A/554/A3
Straizys et al. IC 4996. 2019A&A...623A..22S 2019A&A...623A..22S Cat. J/A+A/623/A22
(End) Prepared by [AAS], Coralie Fix [CDS], 23-Apr-2020