J/A+A/543/A87 Proper motions and photometry of stars in M55 (Sariya+, 2012)
Proper motions and membership probabilities of stars in the region of globular
cluster NGC 6809.
Sariya D.P., Yadav R.K.S., A.Bellini.
<Astron. Astrophys. 543, A87 (2012)>
=2012A&A...543A..87S 2012A&A...543A..87S
ADC_Keywords: Clusters, globular ; Photometry, UBVRI ; Proper motions
Keywords: globular cluster: individual: NGC 6809
Abstract:
NGC 6809 is a luminous metal-poor halo globular cluster that is
relatively easy to study due to its proximity and low concentration.
Because of its high Galactic latitude (b=-23°), interstellar
reddening and contamination is not very high.
We aim to determine the relative proper motion and membership
probability of the stars in the wide area of globular cluster
NGC 6809. To target cluster members reliably during spectroscopic
surveys and both spatial and radial distributions in the cluster
outskirts without including field stars, a good proper motion and
membership probability catalogue of NGC 6809 is required.
Description:
The archival data of two epochs with a time-base line of 7.1-years
have been collected with Wide Field Imager (WFI) mounted on the 2.2m
MPG/ESO telescope. The CCD images of both epochs have been reduced
using the astrometric techniques as described in Anderson et al.
(2006A&A...454.1029A 2006A&A...454.1029A). The calibrated UBVI magnitudes have been
derived using Stetson's secondary standard stars.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table5.dat 154 12606 Proper motions and membership probabilities
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See also:
J/AJ/134/825 : BVI photometry in M55 (NGC 6809) (Vargas+, 2007)
J/AJ/96/1632 : CCD BV photometry in M55 (Schade+ 1988)
J/MNRAS/414/3711 : Proper motion study of M55 stars (Zloczewski+, 2011)
Byte-by-byte Description of file:table5.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- ID Sequential Number
7- 16 F10.6 deg RAdeg Right Ascention (J2000)
18- 27 F10.6 deg DEdeg Declination (J2000)
29- 37 F9.4 pix Xpos X position
39- 47 F9.4 pix Ypos Y position
49- 55 F7.4 mag Umag ?=99.9990 Johnson U magnitude
57- 62 F6.4 mag e_Umag ?=0.9990 rms uncertainty on Umag
64- 70 F7.4 mag Bmag ?=99.9990 Johnson B magnitude
72- 77 F6.4 mag e_Bmag ?=0.9990 rms uncertainty on Bmag
79- 85 F7.4 mag Vmag ?=99.9990 Johnson V magnitude
87- 92 F6.4 mag e_Vmag ?=0.9990 rms uncertainty on Vmag
94-100 F7.4 mag Icmag ?=99.9990 Cousins I magnitude
102-107 F6.4 mag e_Icmag ?=0.9990 rms uncertainty on Icmag
109-116 F8.4 mas/yr pmRA Proper motion along RA (pmRA.cosDE)
118-123 F6.4 mas/yr e_pmRA rms uncertainty on pmRA
125-132 F8.4 mas/yr pmDE Proper motion along DEC
134-139 F6.4 mas/yr e_pmDE rms uncertainty on pmDEC
141-145 F5.2 % Mmb Proper-motion membership probability
147-154 I8 --- Zl11 ? ID number of the stars in Zloczewski et al.
(2011, Cat. J/MNRAS/414/3711)
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Acknowledgements:
Devesh P. Sariya, devesh(at)aries.res.in
References:
Anderson et al., Paper et al., 2006A&A...454.1029A 2006A&A...454.1029A
(End) Patricia Vannier [CDS] 18-May-2012