J/AJ/140/677 BVIc photometry of IC 4665 (Cargile+, 2010)
Employing a new, BVIc photometric survey of IC 4665 to investigate the age of
this young open cluster.
Cargile P.A., James D.J.
<Astron. J., 140, 677-691 (2010)>
=2010AJ....140..677C 2010AJ....140..677C
ADC_Keywords: Clusters, open ; Photometry, UBVRI ; Photometry, infrared
Keywords: open clusters and associations: general -
open clusters and associations: individual (IC 4665) -
stars: evolution - stars: fundamental parameters
Abstract:
We present a new, BVIc photometric survey of the young open cluster
IC 4665, which improves on previous studies of this young cluster by
incorporating a rigorous standardization procedure, thus providing
high-fidelity colors and magnitudes for cluster members. We use this
new photometric dataset to reevaluate the properties (age and
distance) of IC 4665.
Description:
We observed IC 4665 using the 1.0m SMARTS telescope (the old YALO
telescope) situated at the Cerro Tololo Inter-American Observatory
(CTIO), Chile, during the nights of 2005 September 15, 16, and 17. The
data were acquired with the quad-amplifier Y4KCam CCD camera, equipped
with Johnson-Cousins BVIc filters.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 36 11 Summary of SMARTS 1.0m observations of IC 4665
table3.dat 139 7200 SMARTS BVIc photometry for the region around IC 4665
table6.dat 63 382 Catalog of IC 4665 photometric members
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See also:
II/194 : Photometric study of IC 4665 (McCarthy+ 1969)
J/AJ/105/1441 : IC 4665 (Prosser 1993)
J/AJ/106/637 : ICCD speckle observations. IX (Mason+, 1993)
J/A+A/448/189 : IzJHK photometry of IC4665 (de Wit+, 2006)
J/A+A/479/141 : Iz photometry, RV and EW(Li) in IC 4665 (Manzi+, 2008)
J/MNRAS/400/317 : IC 4665 low-mass members (Jeffries+, 2009)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- Field Field (1)
4- 5 I2 h RAh Right ascension (J2000.0) (2)
7- 8 I2 min RAm Right ascension (J2000.0) (2)
10- 13 F4.1 s RAs Right ascension (J2000.0) (2)
15 A1 --- DE- Declination sign (J2000.0) (2)
16- 17 I2 deg DEd Declination (J2000.0) (2)
19- 20 I2 arcmin DEm Declination (J2000.0) (2)
22- 25 F4.1 arcsec DEs Declination (J2000.0) (2)
27- 36 A10 "YYYY/MM/DD" ObsDate Observation date
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Note (1): The nine fields (F1 to F9) represent the main survey area of the
cluster in a 3x3 mosaic covering about 1deg2 centered close to the
cluster's WEBDA coordinates. Photometric data for a control field
(CF) were also procured to allow us to assess the photometric
integrity of the dataset.
Note (2): Coordinates are Y4KCam field centers.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1 A1 --- --- [F]
2 I1 --- Fld Field number (1)
4- 6 I3 --- Seq [1/979] Sequential number within the field (1)
8- 9 I2 h RAh Hour of Right Ascension (J2000)
11- 12 I2 min RAm Minute of Right Ascension (J2000)
14- 18 F5.2 s RAs Second of Right Ascension (J2000)
20 A1 --- DE- Sign of the Declination (J2000)
21 I1 deg DEd Degree of Declination (J2000)
23- 24 I2 arcmin DEm Arcminute of Declination (J2000)
26- 29 F4.1 arcsec DEs Arcsecond of Declination (J2000)
31- 36 F6.3 mag Vmag ?=99.999 Johnson V band magnitude
38- 42 F5.3 mag e_Vmag ?=9.999 Uncertainty in V
44- 49 F6.3 mag B-V ?=99.999 Johnson B-V color index
51- 55 F5.3 mag e_B-V ?=9.999 Uncertainty in B-V
57- 62 F6.3 mag V-Ic ?=99.999 Johnson-Cousins V-Ic color index
64- 68 F5.3 mag e_V-Ic ?=9.999 Uncertainty in V-Ix
70- 71 I2 h RA2h ?=99 2MASS Hour of Right Ascension (J2000)
73- 74 I2 min RA2m ?=99 2MASS Minute of Right Ascension (J2000)
76- 80 F5.2 s RA2s ?=99.99 2MASS Second of Right Ascension (J2000)
82 A1 --- DE2- Sign of the 2MASS Declination (J2000)
83 I1 deg DE2d ?=9 2MASS Degree of Declination (J2000)
85- 86 I2 arcmin DE2m ?=99 2MASS Arcminute of Declination (J2000)
88- 91 F4.1 arcsec DE2s ?=99.99 2MASS Arcsecond of Declination (J2000)
93- 96 F4.2 arcsec Offset ?=0 2MASS/photometric catalog positional offset
98-103 F6.3 mag Jmag ?=99.999 2MASS J band magnitude
105-109 F5.3 mag e_Jmag ?=9.999 Uncertainty in Jmag
111-116 F6.3 mag Hmag ?=99.999 2MASS H band magnitude
118-122 F5.3 mag e_Hmag ?=9.999 Uncertainty in Hmag
124-129 F6.3 mag Ksmag ?=99.999 2MASS Ks band magnitude
131-135 F5.3 mag e_Ksmag ?=9.999 Uncertainty in Kmag
137-139 A3 --- Code 2MASS photometry codes
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Note (1): Sources identified as <[CJ2010] FN-NNN> in Simbad.
Magnitude, colors, positions, and uncertainties given as 99.999 or
9.999 indicate that the value is undetermined. The last 450 objects do
not have matches in the 2MASS catalog.
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1 A1 --- --- [F]
2 I1 --- Fld Mosaic field identification
4- 6 I3 --- Seq Object sequential number within the field
8- 13 F6.3 mag Vmag Johnson V band magnitude
15- 19 F5.3 mag e_Vmag Uncertainty in Vmag
21- 26 F6.3 mag B-V ?=99.999 Johnson B-V color index
28- 32 F5.3 mag e_B-V ?=9.999 Uncertainty in B-V
34- 38 F5.3 mag V-Ic Johnson-Cousins V-Ic color index
40- 44 F5.3 mag e_V-Ic Uncertainty in V-I
46 A1 --- MmB-V [Y/N] Photometric membership based on B-V
color index (1)
48 A1 --- MmV-I [Y/N] Photometric membership based on V-Ic
color index (1)
50- 63 A14 --- MmKey Ancillary membership criterion (2)
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Note (1): Point lies within its photometric uncertainty of the isochrone
using the specified color.
Note (2): See Section 3.1 for source references. Code as follows:
Li = Lithium absorption
XR = X-ray emission
H = Hα emission
RV = Radial Velocity
RP = detected rapid rotation period
J = listed as member in Jeffries et al. (2009, Cat. J/MNRAS/393/538)
ph = photometric member only
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 16-Jun-2012