J/AJ/149/190 UBVRI and infrared photometry of NGC 2215 (Fitzgerald+, 2015)
Photometric and proper motion study of the neglected open cluster NGC 2215.
Fitzgerald M.T., Inwood L., McKinnon D.H., Dias W.S., Sacchi M., Scott B.,
Zolinski M., Danaia L., Edwards R.
<Astron. J., 149, 190 (2015)>
=2015AJ....149..190F 2015AJ....149..190F
ADC_Keywords: Clusters, open ; Photometry, infrared ; Photometry, UBVRI ;
Proper motions
Keywords: methods: observational - open clusters and associations: general -
open clusters and associations: individual: NGC 2215 -
techniques: photometric
Abstract:
Optical UBVRI photometric measurements using the Faulkes Telescope
North were taken in early 2011 and combined with 2MASS JHKs and WISE
infrared photometry as well as UCAC4 proper motion data in order to
estimate the main parameters of the galactic open cluster NGC 2215 of
which large uncertainty exists in the current literature. Fitting a
King model we estimate a core radius of 1.12'±0.04'(0.24±0.01pc)
and a limiting radius of 4.3'±0.5'(0.94±0.11pc) for the cluster.
The results of isochrone fits indicates an age of log(t)=8.85±0.10
with a distance of d=790±90pc, a metallicity of
[Fe/H]=-0.40±0.10dex, and a reddening of E(B-V)=0.26±0.04. A
proportion of the work in this study was undertaken by Australian and
Canadian upper secondary school students involved in the Space to Grow
astronomy education project, and is the first scientific publication
to have utilized our star cluster photometry curriculum materials.
Description:
UBVRI observations of open cluster NGC 2215 were taken on 2011 January
27 using the Merope CCD Camera attached to the robotically controlled
2m Faulkes Telescope North at Haleakala, HI. The pixel scale of the
camera was in 2*2 binning mode with a 4.7'*4.7' field of view (FOV).
We combined our optical data with 2MASS (Cutri et al. 2003, II/246)
JHKs and WISE (Cutri et al. 2012, II/311) infrared photometry as well
as UCAC4 (Zacharias et al. 2012, I/322) proper motion The UCAC4 proper
motions and 2MASS and WISE photometries were extracted via VizieR.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 184 415 Astrometry and photometry of the stars,
combined with 2MASS and WISE.
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See also:
B/ocl : Optically visible open clusters and Candidates (Dias+ 2002-2014)
II/328 : AllWISE Data Release (Cutri+ 2013)
II/311 : WISE All-Sky Data Release (Cutri+ 2012)
I/322 : UCAC4 Catalogue (Zacharias+, 2012)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
J/AJ/146/88 : UBVRI standard stars around celestial equator (Clem+, 2013)
J/A+A/446/949 : Open clusters proper motions based on UCAC2 (Dias+, 2006)
J/A+A/438/1163 : Catalogue of Open Cluster Data (COCD) (Kharchenko+, 2005)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Star [1/415] Star running sequence number
5- 13 F9.6 deg RAdeg ? Right Ascension in decimal degrees (J2000)
15- 23 F9.6 deg DEdeg ? Declination in decimal degrees (J2000)
25- 30 F6.3 mag Umag [11.5/20.1]? Apparent U band magnitude
32- 36 F5.3 mag e_Umag [0.01/0.06]? Error in Umag
38- 43 F6.3 mag Bmag [11.4/21.6]? Apparent B band magnitude
45- 49 F5.3 mag e_Bmag [0.01/0.08]? Error in Bmag
51- 56 F6.3 mag Vmag [11.08/20.5]? Apparent V band magnitude
58- 62 F5.3 mag e_Vmag [0.008/0.05]? Error in Vmag
64- 69 F6.3 mag Rmag [10.6/19.5]? Apparent R band magnitude
71- 75 F5.3 mag e_Rmag [0.01/0.05]? Error in Rmag
77- 82 F6.3 mag Imag [10.4/18.9]? Apparent I band magnitude
84- 88 F5.3 mag e_Imag [0.01/0.06]? Error in Imag
90- 95 F6.3 mag Jmag [8.4/17.1]? 2MASS apparent J band magnitude
97-101 F5.3 mag e_Jmag [0.01/0.19]? Error in Jmag (II/246)
103-108 F6.3 mag Hmag [7.9/17.8]? 2MASS apparent H band magnitude
110-114 F5.3 mag e_Hmag [0.02/0.23]? Error in Hmag (II/246)
116-121 F6.3 mag Kmag [7.8/17.0]? 2MASS apparent Ks band magnitude
123-127 F5.3 mag e_Kmag [0.01/0.30]? Error in Kmag (II/246)
129-134 F6.3 mag W1mag [7.7/17.2]? WISE/W1 apparent 3.4µm band
magnitude (1)
136-140 F5.3 mag e_W1mag [0.02/0.19]? Error in W1mag (1)
142-147 F6.3 mag W2mag [7.8/17.2]? WISE/W2 apparent 4.6µm band
magnitude (1)
149-153 F5.3 mag e_W2mag [0.01/0.53]? Error in W2mag (1) (2)
155-161 F7.3 mas/yr pmRA [-46/63]? Proper Motion in Right Ascention (3)
163-166 F4.1 mas/yr e_pmRA [1/20]? Error in pmRA (3)
168-174 F7.3 mas/yr pmDE [-59/22]? Proper Motion in Declination (3)
176-179 F4.1 mas/yr e_pmDE [1/20]? Error in pmDE (3)
181-184 F4.2 --- Mm [0/1]? Probability of star being a cluster
member (proper motion membership probability)
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Note (1): From WISE All-Sky Data Release (Cutri et al. 2012, II/311).
Note (2): A blank error when a W2mag value is provided indicates a null value.
Note (3): Obtained from UCAC4 catalog (Zacharias et al. 2013, cat. I/322).
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Sylvain Guehenneux [CDS] 11-Jun-2015