J/AJ/140/844 UCAC3 proper motion survey (Finch+, 2010)
UCAC3 proper motion survey.
I. Discovery of new proper motion stars in UCAC3 with 0.40"/yr>µ≥0.18"/yr
between declinations -90° and -47°.
Finch C.T., Zacharias N., Henry T.J.
<Astron. J., 140, 844-869 (2010)>
=2010AJ....140..844F 2010AJ....140..844F
ADC_Keywords: Stars, nearby ; Proper motions ; Surveys ; Photometry ;
Stars, distances
Keywords: astrometry - solar neighborhood - stars: distances -
stars: statistics - surveys
Abstract:
This paper presents 442 new proper motion stellar systems in the
southern sky between declinations -90° and -47° with
0.40"/yr>µ≥0.18"/yr. These systems constitute a 25.3% increase in
new systems for the same region of the sky covered by previous
SuperCOSMOS RECONS (SCR) searches that used Schmidt plates as the
primary source of discovery. Among the new systems are 25 multiples,
plus an additional 7 new common proper motion (CPM) companions to
previously known primaries. All stars have been discovered using the
third U.S. Naval Observatory (USNO) CCD Astrograph Catalog (UCAC3). A
comparison of the UCAC3 proper motions to those from the Hipparcos,
Tycho-2, Southern Proper Motion (SPM4), and SuperCOSMOS efforts is
presented and shows that UCAC3 provides similar values and precision
to the first three surveys.
Description:
The UCAC project has been producing astrometric catalogs since 2000
October, with the first release (UCAC1; Zacharias et al. 2000, Cat.
I/268) covering only 80% of the southern sky. The second catalog in
this series (UCAC2; Zacharias et al. 2004, Cat. I/289) was released in
2003 July with about the same level of completeness as UCAC1, but with
early epoch plates paired with the Astrograph CCD data for improved
proper motions. The UCAC3, released in 2009 August, is the first from
the series to have all sky coverage, and contains just over 100
million entries with a limiting magnitude of ∼16 in the UCAC bandpass
(579-642nm). UCAC3 also includes double star fitting and has a
slightly deeper limiting magnitude than UCAC2 due to a complete
re-reduction of the pixel data (Zacharias et al. 2010, Cat. I/315). A
detailed introduction to the UCAC3 can be found in the released paper
(Zacharias et al. 2010, Cat. I/315)
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 127 474 New UCAC3 high proper motion systems between
declinations -90° and -47° with
0.40"/yr>µ≥0.18"/yr
table4.dat 104 33 Common Proper Motion (CPM) candidate systems
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See also:
I/268 : UCAC1 Catalogue (Zacharias+ 2000)
I/289 : UCAC2 Catalogue (Zacharias+ 2004)
I/315 : UCAC3 Catalogue (Zacharias+ 2009)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1 A1 --- Flag [*a] Position flag (added by CDS) (1)
3- 5 A3 --- --- [UPM]
7- 15 A9 --- UPM Source name (HHMM-DDMM)
16 A1 --- m_UPM [ABC] Multiplicity index on UPM name
18- 27 F10.6 deg RAdeg Right Ascension in decimal degrees (J2000) (1)
29- 38 F10.6 deg DEdeg Declination in decimal degrees (J2000) (1)
40- 45 F6.1 mas/yr pmRA ? Proper motion along RA (*cos(DE))
47- 52 F6.1 mas/yr pmDE ? Proper motion along DE
54- 57 F4.1 mas/yr e_pmRA ? The 1σ uncertainty in pmRAcosDE
59- 62 F4.1 mas/yr e_pmDE ? The 1σ uncertainty in pmDE
64- 69 F6.3 mag Bmag ? SuperCOSMOS BJ plate magnitude
71- 76 F6.3 mag Rmag ? SuperCOSMOS R59F plate magnitude
78- 83 F6.3 mag Imag ? SuperCOSMOS IIVN plate magnitude
85- 90 F6.3 mag Jmag ? 2MASS J band magnitude
92- 97 F6.3 mag Hmag ? 2MASS H band magnitude
99-104 F6.3 mag Ksmag ? 2MASS Ks band magnitude
106-111 F6.3 mag R-J ? The (R59F-J) color index
113-117 F5.1 pc Dist ? Estimated distance (G1)
118 A1 --- f_Dist Indicates a presumably incorrect Dist
120-126 A7 --- Notes Additional note(s) (2)
127 A1 --- T3 [*] * for systems estimated to be within 25pc
(originally listed in table3)
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Note (1): Original values are South Polar distances (not declinations).
RAdeg and DEdeg have been retrieved from UCAC3 at CDS.
* = source not in UCAC3, companion of UCAC3 source.
In that case, the position is those of the UCAC3 companion.
a = source not in UCAC3. In that case,
RAdeg from original table RA, DEdeg from UPM name
Note (2): Notes as follows:
a = Subdwarf candidate picked from RPM diagram; plate distance, see f_Dist
column, is incorrect.
b = Number of relations used for distance estimate <6, plate distance
less reliable.
c = Common proper motion companion; see table4.dat.
d = Not detected during automated search but noticed by eye during the
blinking process.
e = Proper motions suspect.
f = Possible NLTT star with a position difference >90" when compared
to UCAC3 position.
g = Source not in 2MASS.
h = SuperCOSMOS plate magnitudes suspect.
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- Name1 Primary name
16- 21 F6.1 mas/yr pmRA1 Proper motion along RA(*cos(DE)) of primary
23- 28 F6.1 mas/yr pmDE1 Proper motion along DE
30- 34 F5.1 pc Dist1 ? Distance of primary (GA)
36- 49 A14 --- Name2 Secondary (or tertiary for NLTT 19906) name
51- 56 F6.1 mas/yr pmRA2 ?=- Proper motion along RA(*cos(DE)) of
the secondary/tertiary
58- 63 F6.1 mas/yr pmDE2 ?=- Proper motion along DE of
the secondary/tertiary
65- 69 F5.1 pc Dist2 ?=- Distance of secondary (G1)
70 A1 --- f_Dist2 []] Indicates a presumably incorrect Dist2
72- 76 F5.1 arcsec Sep Separation relative to the primary
78- 82 F5.1 deg theta Position angle relative to the primary
84- 90 A7 --- Notes Notes (1)
92- 94 A3 --- --- [UPM]
96-104 A9 --- UPM System name (UPM HHMM-DDMM)
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Note (1): Notes as follows:
a = Not detected during automated search but noticed by eye during
the blinking process.
b = Possible NLTT star with a position difference >90" when compared
to UCAC3 position.
c = White dwarf, estimated distance [in bracket] is incorrect. A more
accurate distance is 34.2pc.
d = Number of relations used for distance estimate <6; plate distance
less reliable.
e = Source not in 2MASS.
f = Proper motions suspect.
g = SuperCOSMOS plate magnitudes suspect.
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Global notes:
Note (G1): Distance estimates are computed from the 11 colors generated
from the six-band photometry (Hambly et al. 2004AJ....128..437H 2004AJ....128..437H),
assuming that all objects are main-sequence stars. The accuracy
reported for this technique is roughly 26%
History:
* 22-Jul-2012: From electronic version of the journal
* 10-Jan-2013: in table2, right ascension and declination in degrees.
References:
Finch et al. Paper II. 2012ApJ...745..118F 2012ApJ...745..118F Cat. J/ApJ/745/118
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 16-Jun-2012