J/A+A/584/A59 Proper motions and membership in NGC 6366 (Sariya+, 2015)
Proper motions and membership probabilities of stars in the region of globular
cluster NGC 6366.
Sariya D.P., Yadav R.K.S.
<Astron. Astrophys. 584, A59 (2015)>
=2015A&A...584A..59S 2015A&A...584A..59S (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, open ; Proper motions ; Photometry
Keywords: globular cluster: individual: NGC 6366 - astrometry - catalogs
Abstract:
NGC 6366 is a metal-rich globular cluster that is relatively
unstudied. It is a kinematically interesting cluster, reported as
belonging to the slowly rotating halo system, which is unusual given
its metallicity and spatial location in the Galaxy.
The purpose of this research is to determine the relative proper
motion and membership probability of the stars in the region of
globular cluster NGC 6366. To target cluster members reliably during
spectroscopic surveys without including field stars, a good proper
motion and membership probability catalogue of NGC 6366 is needed.
To derive relative proper motions, the archival data from the Wide
Field Imager mounted on the ESO 2.2m telescope have been reduced
using a high precision astrometric software. The images used are in
the B,V, and I photometric bands with an epoch gap of ∼3.2yr. The
calibrated BVI magnitudes have been determined using recent data for
secondary standard stars.
Description:
Proper motions of the stars in the cluster region were determined
using V filter images from the ESO archive
(http://archive.eso.org/eso/eso_archive_main.html). The images used in
this work were acquired using the 2.2m ESO/MPI telescope at La Silla,
Chile. This telescope is equipped with a Wide Field Imager (WFI)
camera. This camera contains a mosaic of 4x2, i.e., eight CCD chips,
with 2048x4096-pixels each, making it possible to image an
observational area of 34x33arcmin2.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table4.dat 130 2530 Catalogue of proper motions and membership
probabilities n the region of NGC 6366
--------------------------------------------------------------------------------
See also:
J/AJ/106/604 : Study of globular cluster NGC 6366 (Harris 1993)
J/other/RMxAA/44.365 : New variable stars in NGC 6366 (Arellano Ferro+, 2008)
J/MNRAS/430/3350 : Proper motions and membership in NGC 3766 (Yadav+, 2013)
Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- ID Sequential number
6- 7 I2 h RAh Right ascension (J2000)
9- 10 I2 min RAm Right ascension (J2000)
12- 16 F5.2 s RAs Right ascension (J2000)
18 A1 --- DE- Declination sign (J2000)
19 I1 deg DEd Declination (J2000)
21- 22 I2 arcmin DEm Declination (J2000)
24- 27 F4.1 arcsec DEs Declination (J2000)
29- 37 F9.4 pix Xpos X position
39- 47 F9.4 pix Ypos Y position
49- 57 F9.4 mas/yr pmRA Proper motion along RA (pmRA*cosDE)
59- 64 F6.4 mas/yr e_pmRA rms uncertainty on pmRA
66- 74 F9.4 mas/yr pmDE Proper motion along DEC
76- 81 F6.4 mas/yr e_pmDE rms uncertainty on pmDEC
83- 89 F7.4 mag Bmag ?=99.9999 Johnson B magnitude
91- 96 F6.4 mag e_Bmag ?=9.9999 rms uncertainty on B mag
98-104 F7.4 mag Vmag ?=99.9999 Johnson V magnitude
106-111 F6.4 mag e_Vmag ?=9.9999 rms uncertainty on V mag
113-119 F7.4 mag Imag ?=99.9999 Cousins I magnitude
121-126 F6.4 mag e_Imag ?=9.9999 rms uncertainty on I mag
128-130 I3 % Pmemb Proper-motion membership probability
--------------------------------------------------------------------------------
Acknowledgements:
Devesh Path Sariya, devesh(at)aries.res.in
(End) Patricia Vannier [CDS] 19-Oct-2015