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J/AJ/153/134  Proper motions and photometry of stars in NGC 3201 (Sariya+, 2017)

A proper motions study of the globular cluster NGC 3201. Sariya D.P., Jiang I.-G., Yadav R.K.S. <Astron. J., 153, 134-134 (2017)> =2017AJ....153..134S (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, globular ; Proper motions ; Photometry, UBVRI Keywords: astrometry - catalogs - globular clusters: individual: NGC 3201 Abstract: With a high value of heliocentric radial velocity, a retrograde orbit, and suspected to have an extragalactic origin, NGC 3201 is an interesting globular cluster for kinematical studies. Our purpose is to calculate the relative proper motions (PMs) and membership probability for the stars in the wide region of globular cluster NGC 3201. PM based membership probabilities are used to isolate the cluster sample from the field stars. The membership catalog will help address the question of chemical inhomogeneity in the cluster. Archive CCD data taken with a wide-field imager (WFI) mounted on the ESO 2.2m telescope are reduced using the high-precision astrometric software developed by Anderson et al. for the WFI images. The epoch gap between the two observational runs is ∼14.3 years. To standardize the BVI photometry, Stetson's secondary standard stars are used. The CCD data with an epoch gap of ∼14.3 years enables us to decontaminate the cluster stars from field stars efficiently. The median precision of PMs is better than ∼0.8mas/yr for stars having V<18mag that increases up to ∼1.5mas/yr for stars with 18<V<20mag. Kinematic membership probabilities are calculated using PMs for stars brighter than V∼20mag. An electronic catalog of positions, relative PMs, BVI magnitudes, and membership probabilities in the ∼19.7x17arcmin2 region of NGC 3201 is presented. We use our membership catalog to identify probable cluster members among the known variables and X-ray sources in the direction of NGC 3201. Description: To determine the PMs of the stars in this work, we used archive images (http://archive.eso.org/eso/eso_archive_main.html) from observations made with the 2.2m ESO/MPI telescope at La Silla, Chile. This telescope contains a mosaic camera called the Wide-Field Imager (WFI), consisting of 4*2 (i.e., 8 CCD chips). Since each CCD has an array of 2048*4096 pixels, WFI ultimately produces images with a 34*33arcmin2 field of view. The observational run of the first epoch contains two images in B,V and I bands, each with 240s exposure time observed on 1999 December 05. In the second epoch, we have 35 images with 40s exposure time each in V filter observed during the period of 2014 April 02-05. Thus the epoch gap between the data is ∼14.3 years. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3.dat 13 14 Membership probability of the known variables in the direction of NGC 3201 and X-ray sources from Webb et al. 2006 (Cat. J/A+A/445/155) table4.dat 130 8322 The membership catalog for NGC 3201
See also: VII/202 : Globular Clusters in the Milky Way (Harris, 1997) J/ApJ/801/69 : EWs for giant star members of NGC3201 (Mucciarelli+, 2015) J/A+A/584/A59 : Proper motions and membership in NGC 6366 (Sariya+, 2015) J/other/RMxAA/50.307 : RR Lyr light curves in NGC 3201 (Arellano Ferro+, 2014) J/MNRAS/430/3350 : Proper motions and membership in NGC 3766 (Yadav+, 2013) J/AcA/62/357 : Proper motions in 6 globular clusters (Zloczewski+, 2012) J/A+A/543/A87 : Stars proper motions and photometry in M55 (Sariya+, 2012) J/A+A/497/371 : UBVI photometry of NGC 3201 (Kravtsov+, 2009) J/A+A/484/609 : BVI photometry and proper motions in M67 (Yadav+, 2008) J/A+A/445/155 : XMM count-rates in M 55 and NGC 3201 (Webb+, 2006) J/AJ/123/279 : VI Photometry and Variables in NGC 3201 (von Braun+, 2002) J/A+AS/131/89 : NGC 1750 + NGC 1758 proper motions (Tian+ 1998) J/ApJ/454/788 : Radial velocities and BV photometry of NGC 3201 (Cote+ 1995) J/ApJS/90/83 : Binaries in NGC 3201 (Cote+, 1994) http://archive.eso.org/eso/eso_archive_main.html : ESO Science Archive Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1 A1 --- f_Sce [VX] Flag on Source (V=known variable in the direction of NGC 3201; X=X-ray source from Webb et al. 2006, Cat. J/A+A/445/155) 2- 4 I3 --- Sce Identification number of the source (1) 6- 8 I3 % Mm ? Membership probability 10- 13 I4 --- Star ? Star number in our catalog
Note (1): The variable stars of NGC 3201 have been compiled on Clement's webpage of the catalog of variable stars in globular clusters (http://www.astro.utoronto.ca/~cclement/cat/C1015m461). Recently some new variables were detected by Kaluzny et al. (2016AcA....66...31K). We found four variable stars in common with our catalog. V137 comes from the variables listed in Kaluzny et al. (2016AcA....66...31K), and the coordinates of the other three variables have been taken from Clement's webpage.
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 4 I4 --- Star [1/8322] Running sequential number (ID) 6- 7 I2 h RAh Hour of Right Ascension (J2000) 9- 10 I2 min RAm Minute of Right Ascension (J2000) 12- 16 F5.2 s RAs Second of Right Ascension (J2000) 18 A1 --- DE- Sign of the Declination (J2000) 19- 20 I2 deg DEd Degree of Declination (J2000) 22- 23 I2 arcmin DEm Arcminute of Declination (J2000) 25- 28 F4.1 arcsec DEs Arcsecond of Declination (J2000) 30- 38 F9.4 pix Xpos [1544.4/4979.9] X position in CCD pixels 40- 48 F9.4 pix Ypos [247.47/4516.05] Y position in CCD pixels 50- 58 F9.4 mas/yr pmRA [-104.1/76.65] Relative proper motion along RA µαcos(δ) 60- 65 F6.4 mas/yr e_pmRA [0.04/2] rms uncertainty on pmRA σµαcos(δ) 67- 74 F8.4 mas/yr pmDE [-70.9/34.47] Relative proper motion along DEC µδ 76- 81 F6.4 mas/yr e_pmDE [0.06/2] rms uncertainty on pmDE σµδ 83- 89 F7.4 mag Bmag [12.55/21.62] Johnson B magnitude 91- 96 F6.4 mag e_Bmag [0/0.17] rms uncertainty on B mag σB 98-104 F7.4 mag Vmag [11.76/20.1] Johnson V magnitude 106-111 F6.4 mag e_Vmag [0.0001/0.19] rms uncertainty on V mag σV 113-119 F7.4 mag Imag [9.93/19.12] Cousins I magnitude 121-126 F6.4 mag e_Imag [0.0002/0.2] rms uncertainty on I mag σI 128-130 I3 % Mm [0/100] Proper-motion membership probability Pµ (please refer to Section 3 in the paper for details)
History: From electronic version of the journal
(End) Prepared by [AAS]; Sylvain Guehenneux [CDS] 26-Jul-2017
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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