J/MNRAS/463/4210 All-sky catalog of solar-type dwarfs (Nascimbeni+, 2016)
An all-sky catalog of solar-type dwarfs for exoplanetary transit surveys.
Nascimbeni V., Piotto G., Ortolani S., Giuffrida G., Marrese P.M.,
Magrin D., Ragazzoni R., Pagano I., Rauer H., Cabrera J., Pollacco D.,
Heras A.M., Deleuil M., Gizon L., Granata V.
<Mon. Not. R. Astron. Soc. 463, 4210 (2016)>
=2016MNRAS.463.4210N 2016MNRAS.463.4210N (SIMBAD/NED BibCode)
ADC_Keywords: Surveys ; Positional data ; Proper motions
Keywords: methods: statistical - catalogs - planetary systems -
stars: solar-type - stars: statistics
Abstract:
Most future surveys designed to discover transiting exoplanets,
including TESS and PLATO, will target bright (V<13) and nearby
solar-type stars having a spectral type later than F5. In order to
enhance the probability of identifying transits, these surveys must
cover a very large area on the sky, because of the intrinsically low
areal density of bright targets. Unfortunately, no existing catalog of
stellar parameters is both deep and wide enough to provide a
homogeneous input list. As the first Gaia data release exploitable for
this purpose is expected to be released not earlier than late 2017, we
have devised an improved reduced-proper-motion method to discriminate
late field dwarfs and giants by combining UCAC4 proper motions with
APASS DR6 photometry, and relying on RAVEDR4 as an external
calibrator. The output, named UCAC4-RPM, is a publicly-available,
complete all-sky catalog of solar-type dwarfs down to V<13.5, plus an
extension to logg>3.0 subgiants. The relatively low amount of
contamination (defined as the fraction of false positives; <30%) also
makes UCAC4-RPM a useful tool for the past and ongoing ground-based
transit surveys, which need to discard candidate signals originating
from early-type or giant stars. As an application, we show how
UCAC4-RPM may support the preparation of the TESS (that will map
almost the entire sky) input catalog and the input catalog of PLATO,
planned to survey more than half of the whole sky with exquisite
photometric precision.
Description:
We devised a new RPM-based algorithm to assign a luminosity class to
field stars by knowing only their proper motions and two optical
magnitudes. By applying this optimal algorithm on a new stellar
catalogue compiled by matching UCAC4, APASS DR6 and Tycho-2, we ended
up with UCAC4-RPM - an all-sky sample of solar-type dwarf stars
complete down to at least V~=13.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
ucac4rpm.dat 70 9928389 UCAC4-RPM catalog v1.0
ucac4rpm.fits 2880 206847 Fits version of the catalog
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See also:
I/259 : The Tycho-2 Catalogue (Hog+ 2000)
I/322 : UCAC4 Catalogue (Zacharias+ 2012)
II/336 : AAVSO Photometric All Sky Survey (APASS) DR9 (Henden+, 2016)
III/272 : RAVE 4th data release (Kordopatis+, 2013)
Byte-by-byte Description of file: ucac4rpm.dat
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Bytes Format Units Label Explanations
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1- 11 F11.7 deg RAdeg Right ascension in decimal degrees (J2000)
13- 23 F11.7 deg DEdeg Declination in decimal degrees (J2000)
25- 32 F8.1 mas/yr pmRA Proper motion in RA (from TYC2 or UCAC4)
34- 41 F8.1 mas/yr pmDE Proper motion in DE (from TYC2 or UCAC4)
43- 48 F6.3 mag Bmag Johnson B-band magnitude
(Vmag+0.85*(BTmag-Vmag))
50- 55 F6.3 mag Vmag Johnson V-band magnitude
(VTmag-0.09*(BTmag-VTmag)
57 I1 --- origin [1/4] Origin of B, V magnitudes (1)
59- 66 F8.5 mag rpmv Reduced proper motion in V
(Vmag+5*log10(sqrt((pmRA*pmRA)+(pmDE*pmDE))
68 I1 --- dlf5 [0/1] Star is from DLF5 sample, 1 = true
70 I1 --- dslf5 [0/1] Star is from DSLF5 sample, 1 = true
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Note (1): Flag as follows:
1 = converted from Tycho (Cat. I/259) BT, VT
2 = from APASS DR6
3 = from APASS DR6, corrected
4 - converted from UCAC4 (Cat. I/322) f.mag and 2MASS (Cat. II/246) J
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Acknowledgements:
Valerio Nascimbeni, valerio.nascimbeni(at)unipd.it
(End) Valerio Nascimbeni [DFA-UNIPD, Italy], Patricia Vannier [CDS] 13-Sep-2016