J/ApJS/176/262 VRI photometry and theta values in open clusters (Taylor+, 2008)
Cousins VRI Photometry and Temperatures and V-K Photometry for stars
in open cluster.
Taylor B.J., Joner M.D., Jeffery E.D.
<Astrophys. J. Suppl. Ser. 176, 262 (2008)>
=2008ApJS..176..262T 2008ApJS..176..262T
ADC_Keywords: Clusters, open ; Effective temperatures; Photometry, Cousins
Keywords: Hertzsprung-Russell diagram - open clusters and associations:
individual (Coma, Hyades, M67, NGC 752, Praesepe) -
stars: fundamental parameters
Abstract:
In this paper, new Cousins VRI data are presented for NGC 752 and
Praesepe, and new and extant data are combined into an augmented
database for M67. For those three clusters, catalogs containing
Cousins VRI photometry, reddening-corrected values of (V-K)J, and
temperatures are produced. The same is done for Coma by using both
previously published and newly derived Cousins photometry. An extant
set of catalogs for the Hyades is updated to include V magnitudes and
values of (R-I)C that were published after the original catalogs
appeared. Finally, M67 V magnitudes published previously by Sandquist
are corrected for an effect that depends on location on the face of
the cluster. The corrected data and values of (V-I)C given by
Sandquist are then set out in a supplementary catalog.
Objects:
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RA (2000) DE Designation(s) (files)
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12 22 30 +25 51 Coma = Cl Melotte 111 (coma01.dat coma02.dat)
08 51 18 +11 48 M 67 = NGC 2682 (m6701.dat m6702.dat m6703.dat)
01 57 41 +37 47 NGC 752 = Cl Melotte 12 (ngc75201.dat ngc75202.dat)
08 40 24 +19 41 Praesepe = M 44 (prsp01.dat prsp02.dat)
04 26 54 +15 52 Hyades = Cl Melotte 25 (hyades1.dat hyades2.dat hyades3.dat)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
coma01.dat 50 17 *Cousins VRI Photometry for Coma Stars
coma02.dat 50 27 *Catalog of V-K and theta for Coma star
m6701.dat 50 241 *Cousins VRI Photometry for M67 stars
m6702.dat 50 347 *Catalog of V-K and theta for M67 stars
m6703.dat 28 210 *VRI catalog of M67 stars
ngc75201.dat 50 46 Cousins VRI Photometry for NGC 752 stars
ngc75202.dat 50 48 *Catalog of V-K and theta for NGC 752 stars
prsp01.dat 50 38 Cousins VRI Photometry for Praesepe stars
prsp02.dat 50 84 *Catalog of V-K and theta for Praesepe stars
hyades1.dat 63 103 *Catalog of R-I, V-K, and theta for "kind 1"
Hyades stars that may be treated as single stars
hyades2.dat 63 18 *Catalog of R-I, V-K, and theta for "kind 2"
Hyades binaries
hyades3.dat 40 26 *Catalog of theta values for "kind 3" Hyades stars
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Note on m6703.dat: The original source of these data is Sandquist,
2004MNRAS.347..101S 2004MNRAS.347..101S. The V magnitudes in this file have been corrected
for a position-dependent systematic effect. No corrections have been
applied to the V-I data. In addition, no reddening or absorption
corrections have been applied.
Note on hyades3.dat: For wavelengths near 5500Å, each listed value of
T(color) represents the effective temperature of a single star with
the same short-wavelength color indices as those of the binary. For
wavelengths near 7000Å, similar reasoning applies, with
long-wavelength color indices being considered.
Note on coma01.dat: The original source of these data is Taylor & Joner,
1985AJ.....90..479T 1985AJ.....90..479T.
Note on coma02.dat: The V and V-K values have not been corrected for
reddening because Coma is unreddened (see Taylor, 2006AJ....132.2453T 2006AJ....132.2453T).
Note on m6701.dat: The entries in the file supersede all extant M67 data
bases published previously by Joner & Taylor (see the new paper for
a list of sources of the superseded data).
Note on m6702.dat: The value of E(B-V) used to correct the V and V-K data
to unreddened status is 41mmag (see Taylor, 2007AJ....133..370T 2007AJ....133..370T;
the standard error of E(B-V) quoted there is 4mmag).
Note on ngc75202.dat: The V and V-K values have been corrected for a
reddening value E(B-V) of 44mmag (see Taylor, 2007AJ....134..934T 2007AJ....134..934T;
the standard error of E(B-V) is 3.4mmag).
Note on prsp02.dat: The V and V-K values have been corrected for a
reddening value E(B-V) of 27mmag (see Taylor, 2006AJ....132.2453T 2006AJ....132.2453T;
the standard error of E(B-V) is 4mmag).
Note on hyades1.dat: For each value of R-I, the rms error is 4.3mmag or
less, and a consistency check of data from at least two sources has
been performed.
Note on hyades2.dat: For some listed values of R-I and V-K, only one source
datum is available. For the remainder, the standard error for R-I is
greater than 4.3mmag.
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See also:
II/118 : UBVRI standards around Celestial Equator (Landolt 1983)
II/183 : UBVRI Photometric Standards (Landolt 1992)
Byte-by-byte Description of file: coma01.dat m6701.dat ngc75201.dat prsp01.dat
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Bytes Format Units Label Explanations
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2- 5 I4 --- WEBDA WEBDA number
7- 13 A7 --- OName Alternate designation (1)
14 A1 --- Bin "B" for binary, blank otherwise
15- 21 F7.3 mag Vmag V magnitude (2)
22- 26 F5.1 mmag e_Vmag V standard error
27- 33 F7.3 mag V-Rc Cousins/Landolt V-R (2)
34- 38 F5.1 mmag e_V-Rc Cousins/Landolt V-R standard error
39- 45 F7.3 mag Rc-Ic Cousins R-I (2)
46- 50 F5.1 mmag e_Rc-Ic Cousins R-I standard error
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Note (1): Klein-Wassink (KW) designation for ngc75201.dat and prsp01.dat
Note (2): No reddening or absorption corrections have been applied to the
data. To obtain V-R data with Cousins scaling, multiply the V-R
entries in the catalog by 0.989 (see equation 5 in Taylor & Joner,
1996AJ....111.1338T 1996AJ....111.1338T)
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Byte-by-byte Description of file: coma02.dat m6702.dat ngc75202.dat prsp02.dat
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Bytes Format Units Label Explanations
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2- 5 I4 --- WEBDA WEBDA number
7- 13 A7 --- OName Alternate designation (may be blank)
14 A1 --- Bin [B] "B" for binary, blank otherwise
15- 21 F7.3 mag Vmag Johnson V magnitude
22- 26 F5.1 mmag e_Vmag Johnson V standard error
27- 33 F7.3 mag V-K Johnson V-K colour index (1)
34- 38 F5.0 mmag e_V-K Johnson V-K colour index standard error
39- 45 F7.3 --- theta theta = 5040/T(eff) (G1)
46- 50 F5.1 10-3 e_theta 1000 time standard deviation for theta
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Note (1): The V-K data have been transformed from values of b-y,
Cousins R-I, and 2MASS V-K.
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Byte-by-byte Description of file: hyades1.dat hyades2.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- vB van Beuren number
5- 14 A10 --- OName Other name (Hic, HD, HR)
15 A1 --- Bin [AB] "A" or "B" for binary components
17- 18 A2 --- Type [GNS M] Type (1)
20- 24 F5.3 mag Rc-Ic Cousins R-I colour index
25- 29 F5.1 mmag e_Rc-Ic Standard deviation for Rc-Ic
31- 35 F5.3 mag V-K Johnson V-K colour index
36- 40 F5.0 mmag e_V-K Standard deviation for Johnson V-K
42- 46 F5.3 --- theta theta = 5040/T(eff)
47- 51 F5.1 10-3 e_theta 1000 times standard deviation for theta
53- 58 F6.3 mag Vmag Johnson V magnitude
59- 63 F5.1 mmag e_Vmag Standard deviation for V
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Note (1): Type as follows:
G = giant
N = dwarf non-binary
S = dwarf binary treated as single star
GS = giant-star binary treated as single star
M = late K or M dwarf
MS = spectroscopic binary treated as a single star and containing
a late type dwarf
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Byte-by-byte Description of file: hyades3.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- vB van Beuren number
5- 14 A10 --- OName Other name (Hic, HD)
17 A1 --- Bin [B] "B" = binary
20- 24 F5.3 --- theta5 theta=5040/T(color) from 5500Å (G1)
25- 29 F5.1 10-3 e_theta5 1000 times standard deviation for theta
30- 35 F6.3 --- theta7 theta=5040/T(color) from 7000Å (G1)
38- 40 F3.0 10-3 e_theta7 1000 times standard deviation for theta
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Byte-by-byte Description of file: m6703.dat
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Bytes Format Units Label Explanations
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2- 5 I4 --- WEBDA WEBDA number
7- 14 A8 --- OName Fagerholm, MMJ, or Eggen-Sandage number
15- 21 F7.3 mag Vmag V magnitude (1)
22- 28 F7.3 mag V-Ic Cousins/Landolt V-I (1)
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Note (1): For a conversion equation between the Landolt and Cousins
versions of V-R, see Taylor & Joner, 1996AJ....111.1338T 1996AJ....111.1338T (equation 5).
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Global notes:
Note (G1): Values of theta are based on the temperature scale of
Di Benedetto (1998, Cat. J/A+A/339/858).
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Acknowledgements:
Benjamin Taylor, taylorb(at)byu.edu
(End) Patricia Vannier [CDS] 29-Nov-2007