J/AJ/126/2922 Astrometry and membership in NGC 188 (Platais+, 2003)
WIYN open cluster study. XVII. Astrometry and membership to V=21 in NGC 188.
Platais I., Kozhurina-platais V., Mathieu R.D., Girard T.M.,
Van Altena W.F.
<Astron. J., 126, 2922-2935 (2003)>
=2003AJ....126.2922P 2003AJ....126.2922P
ADC_Keywords: Clusters, open ; Proper motions ; Photometry, CCD
Keywords: astrometry - open clusters and associations: individual (NGC 188)
Abstract:
We present techniques for obtaining precision astrometry using old
photographic plates from assorted large-aperture reflectors in
combination with recent CCD Mosaic Imager frames. At the core of this
approach is a transformation of plate/CCD coordinates into a
previously constructed astrometric reference frame around the open
cluster NGC 188.
Description:
The astrometric reductions are based on 30 photographic plates taken
with three different large reflectors in Johnson's BV bandpasses,
combined with numerous CCD mosaic frames obtained with the Kitt Peak
National Observatory (KPNO) Mayall 4m telescope (Table 1).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 137 7812 Catalog of positions, proper motions, and BV CCD
photometry in the region of open cluster NGC 188
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See also:
J/AJ/124/601 : Absolute positions + proper motions in NGC 188 (Platais+, 2002)
Table 1: Plates and CCD mosaic frames
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Telescope Latitude (deg) Plates Epoch Range Scale
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Mount Wilson 60 inch 34.22 5B, 2V 1958-1959 27.1"/mm
Hale 5 m 33.36 2B, 2V 1960 11.1"/mm
KPNO 4 m 31.96 10B, 9V 1975-1979 18.6"/mm
KPNO 4 m 31.96 26B, 81V 1998-2001 0.26"/pixel
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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- 4 I4 --- PKM Object identifier, Cl* NGC 188 PKM NNNN
6- 15 F10.7 deg RAdeg Right Ascension expressed in decimal degrees
ICRS, Ep=J2000 (1)
17- 26 F10.7 deg DEdeg Declination expressed in decimal degrees
ICRS, Ep=J2000 (1)
28- 33 F6.2 mas/yr pmRA Proper motion in Right Ascension multiplied
by cos(DE) (2)
35- 40 F6.2 mas/yr pmDE Proper motion in declination (2)
42- 45 F4.2 mas/yr e_pmRA Standard error in pmRA
47- 50 F4.2 mas/yr e_pmDE Standard error in pmDE
52- 53 I2 --- Num Initial number of photographic plates and CCD
frames used for astrometry
55- 56 I2 --- o_pmRA Number of deleted datapoints in RA
astrometric solution
58- 59 I2 --- o_pmDE Number of deleted datapoints in DE
astrometric solution
61- 62 I2 % MProb ?=-1 Membership probability (3)
64- 69 F6.3 mag Vmag The CCD V band magnitude
71- 76 F6.3 mag B-V The (B-V) color index from CCD photometry (4)
78- 79 I2 --- o_Vmag Number of V CCD frames
81- 82 I2 --- o_Bmag Number of B CCD frames
84- 88 F5.3 mag e_Vmag Estimated standard deviation in V magnitude
90- 94 F5.3 mag e_Bmag Estimated standard deviation in B magnitude
96 A1 --- ICode [DG] Internal classification code (5)
98-101 I4 --- DGV ? Cross-identification with Dinescu et al.,
1996AJ....111.1205D 1996AJ....111.1205D, Cl* NGC 188 DGV NNNN
103-109 A7 --- S62 Cross-identification with Sandage,
1962ApJ...135..333S 1962ApJ...135..333S, (6)
111-117 F7.2 yr epRA Mean epoch of RA position
119-123 F5.1 mas e_RAdeg Standard error in RA multiplied by cos(DE)
125-131 F7.2 yr epDE Mean epoch of DE position
133-137 F5.1 mas e_DEdeg Standard error in DE
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Note (1): For the epoch 2000.0 degrees and in the ICRS reference system
(i.e. equinox J2000.0).
Note (2): A proper motion equal to exact zero in both coordinates is set
for extremely poor measurements.
Note (3): -1 = the probability has not been calculated.
Note (4): -0.500 = unknown B-V.
Note (5): Internal classification code:
G = galaxy (only `astrometric' galaxies marked);
D = visual binary with separation less than 5".
Note (6): Simbad denominations:
A: Cl* NGC 188 San A
I-NNN: NGC 188 1NNN
II-NNN: NGC 188 2NNN
III-NNN: NGC 188 3NNN
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History:
From electronic version of the journal
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Cummings et al., Pap L 2012AJ....144..137C 2012AJ....144..137C
Geller et al., Pap LI 2013AJ....145....8G 2013AJ....145....8G
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Pap LVI
Maderak et al., Pap LVII 2013AJ....146..143M 2013AJ....146..143M
Pap LVIII
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Thompson et al., Pap LXII 2014AJ....148...85T 2014AJ....148...85T, Cat. J/AJ/148/85
Maderak et al., Pap LXIII 2015AJ....149..141M 2015AJ....149..141M
Pap LXIV
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Pap LXVIII
Pap LXIX
Pap LXX
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Anthony-Twarog et al., Pap LXXII 2016AJ....152..192A 2016AJ....152..192A, cat. J/AJ/152/192
Pap LXXIII
Pap LXXIV
Cummings et al., Pap LXXV 2017AJ....153..128C 2017AJ....153..128C
Anthony-Twarog et al., Pap LXXVI 2018AJ....155..138A 2018AJ....155..138A
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 12-Jan-2004