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J/A+A/584/A31       Photometry of VVV CL041 cluster               (Chene+, 2015)

Massive open star clusters using the VVV survey. IV. WR 62-2, a new very massive star in the core of the VVV CL041 cluster. Chene A.-N., Ramirez Alegria S., Borissova J., O'Leary E., Martins F., Herve A., Kuhn M., Kurtev R., Consuelo Amigo Fuentes P., Bonatto C., Minniti D. <Astron. Astrophys. 584, A31 (2015)> =2015A&A...584A..31C (SIMBAD/NED BibCode)
ADC_Keywords: Surveys ; Clusters, open ; Photometry, infrared Keywords: open clusters and associations: individual: VVV CL041 - stars: massive - stars: Wolf-Rayet - infrared: stars - surveys Abstract: The ESO Public Survey VISTA Variables in the Via Lactea (VVV) provides deep multi-epoch infrared observations for an unprecedented 562 sq. deg of the Galactic bulge and adjacent regions of the disk. Nearly 150 new open clusters and cluster candidates have been discovered in this survey. We present the fourth article in a series of papers focussed on young and massive clusters discovered in the VVV survey. This article is dedicated to the cluster VVV CL041, which contains a new very massive star candidate, WR 62-2. Following the methodology presented in the first paper of the series, wide-field, deep JHKs VVV observations, combined with new infrared spectroscopy, are employed to constrain fundamental parameters (distance, reddening, mass, age) of VVV CL041. Description: We present the JHKs photometry extracted from the VVV (VISTA variables in the Via Lactea) survey for the cluster VVV CL041. The photometry extraction was performed by employing the VVV-SkZ pipeline's (Mauro et al., 2013RMxAA..49..189M) automated software based on ALLFRAME (Stetson, 1994PASP..106..250S). 2MASS photometry was used for absolute flux calibration in the J, H, and Ks bands, using stars with 12.5<J<14.5mag, 11.5<H<13mag, and 11<Ks<12.5mag. We performed stellar detection with DAOphot, following a similar approach as in the VVV-SkZ pipeline. Statistical field-star decontamination was performed via the algorithm of Bonatto & Bica (2010A&A...516A..81B). Objects: ---------------------------------------------- RA (ICRS) DE Designation(s) ---------------------------------------------- 14 46 26 -59 23.3 VVV CL041 = VVV CL041 ---------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file vvvcl041.dat 89 221493 Photometric catalogue
See also: II/337 : VISTA Variables in the Via Lactea Survey DR1 (Minniti+, 2014) Byte-by-byte Description of file: vvvcl041.dat
Bytes Format Units Label Explanations
1- 12 F12.7 arcsec Dist Distance to the central coordinates of the cluster 14- 24 F11.7 deg RAdeg Right ascension (J2000) 26- 36 F11.7 deg DEdeg Declination (J2000) 38- 44 F7.4 mag Jmag J magnitude 46- 51 F6.4 mag e_Jmag Error on Jmag 53- 59 F7.4 mag Hmag H magnitude 61- 66 F6.4 mag e_Hmag Error on Hmag 68- 74 F7.4 mag Ksmag Ks magnitude 76- 81 F6.4 mag e_Ksmag Error in Ksmag 83- 89 A7 --- statdec Note (1)
Note (1): Tells if the star was considered as cluster member or not by the statistical decontamination (Bonatto & Bica, 2010A&A...516A..81B) as follows: cluster = was considered as member of the cluster sky = was considered as fore/background star
Acknowledgements: Andre-Nicolas Chene, achene(at)
(End) Andre-Nicolas Chene [Gemini Obs.], Patricia Vannier [CDS] 18-Nov-2015
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