the vvv templates project - rodolfo angeloni's webpage › uploads › 6 › 0 › 7 › 8 ›...

Updates from the

VVV Templates Project

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Rodolfo Angeloni

on behalf of the VVV Templates Project Team

Pontificia Universidad Católica

Departamento de Astronomía y Astrofísica

The VVV Templates Project Team

Javier Alonso-García

Rodolfo Angeloni

Juan Carlos Beamin

Cristobal Berger

Jura Borissova

* Márcio Catelan

André-Nicolas Chené

Carlos Contreras

István Dékány

Susana Eyheramendy

Janghee Han

Krzysztof Helminiak

Maren Hempel

Andrés Jordán

Carlos Eduardo Lopes

Camila Navarrete

Claudio Navarro

Paloma Perez

Karim Pichara

Alvaro Rojas

Roberto Saito

…

+ many more local collaborators

* Project leader

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survey area ~ 520 sq. deg.

> 33 globular clusters

> 350 open clusters

~ 109 points sources

~ 106 variable stars

The primary goal of the VVV Templates Project is to build

a statistically significant database of IR light curves for the

automated classification of the VVV variable stars

VVV Survey in numbers

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Variability tree

A tentative organization of variable objects

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Type N (CoRoT) N (VVV)

RRab Lyrae 129 15

EA-type 169 8

Classical Cepheids 195 32

The starting point…

The necessary high-quality templates that are needed for automated

variable star classification algorithms are not available in the near-IR

For many classes there are no data at all!

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Example of “well-sampled" light curves from the literature

(ab-type RR Lyrae stars in the globular cluster Centauri -

Del Principe et al. 2006).

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Proper light curves templates of ab-type RR Lyrae stars

in the globular cluster ω Centauri, by Jones et al.

(1996). Templates data of this quality are seldom found

in the literature.


Example of “well-sampled" light curves from the literature

(ab-type RR Lyrae stars in the globular cluster Centauri -

Del Principe et al. 2006).

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Digging into the literature…

(Symbiotic) Mirae & Semiregular variables from Gromadzki et al. 2009

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Digging into the literature…

R Coronae Borealis from Feast et al. 1997

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Digging into the (unexplored) archives…

Wide Field Infrared Camera for UKIRT WFCAM Science Archive standard star calibration data

from Lopes et al. (2012), in preparation

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Digging into the (unexplored) archives…

Wide Field Infrared Camera for UKIRT WFCAM Science Archive standard star calibration data

Variable Star Catalogue from WFCAM

Today’s talk: Session III, 15.30 - by Carlos Eduardo Lopes

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We also started an independent monitoring of hundreds of (optically well-studied) variable

stars in the JHKs bands, by securing observing time at several IR facilities across the world.

We need (much) more data!

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ANDICAM

FoV: 2,4’x2,4’ – pixel scale: 0,137 arcsec/pix

K-band light curve of the delta Cephei star BD Pup

(I. Dekany)

SMARTS 1,3m Telescope + ANDICAM

Facilities around the world

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REMIR

FoV: 10’x10’ – pixel scale: 1.2 arcsec/pix

K-band light curve of the type II Cepheid WY Sco

(I. Dekany)

INAF/REM 0,6m Telescope + REMIR


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K-band light curve of SX Phe, taken at the SAAO 0.75m Telescope

in Sept. 2010. Note the overall amplitude of 0.15 mag!

Observer: Carlos Contreras

SAAO/0,75m Telescope + MkII photometer


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SAAO/IRSF 1.4m Telescope + SIRPOL

SIRPOL

FoV: 7.7’x7.7’ – pixel scale: 0.45 arcsec/pix


M62

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SAAO/IRSF 1.4m Telescope + SIRPOL


M62

Pursuing RR Lyrae template light curves in the globular clusters M62

Juan Carlos Beamin POSTER 02

from the ABSTRACT …Here we report advances in the acquisition of template light curves for RR Lyrae stars in the Globular Cluster M62 one of the richest clusters in terms of number of RR Lyrae stars.

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CAIN III

FoV: 4.2’x4.2’ – pixel scale: 1 arcsec/pix

IAC/TCS 1.5m Telescope + CAIN III


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Period-Luminosity relations for delta Scuti stars in open clusters

Camila Navarrete POSTER 06



ABSTRACT Period-Luminosity relations were derived for low amplitude delta Scuti stars, from three open clusters, in J, H and Ks bands. The slope values found are in disagreement with the ones previously derived by King (1990). Nevertheless, we find that the slope values follow a behavior similar to that found for Cepheids stars, which is consistent with the expected ones for pulsating stars of Population I (Tsvetkov, 1988).

NGC7062 NGC1817

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VRI-JHK light curves of high-amplitude delta Scuti stars

Claudio Navarro


Simultaneous optical monitoring with the Asiago Schmidt 67/92 Telescope


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Simultaneous optical monitoring with the Asiago Schmidt 67/92 Telescope


V R

J K

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KASINICS

FoV: 3,3’x3,3’ – pixel scale: 0,39 arcsec/pix

BOAO 1,8m Telescope + KASINICS


IR Light Curve of BL Cam using BOAO in Korea. Preliminary result of VVV light curve templates

Janghee Han POSTER 08

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Ongoing VISTA observations of the globular cluster Cen.

Left panel: an example of variable star distribution across the cluster field: red circles mark the positions of known RR Lyrae stars,

while blue squares mark the positions of known eclipsing binaries.

Right panel: VIRCAM@VISTA's 16 detectors, with Cen at the center of the focal plane.

ESO/VISTA 4m Telescope + VIRCAM


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Such a project will lead to high-quality light curves for more than 250 variables, greatly exceeding, both in quantity

and in completeness of each individual light curve, what was achieved in previous near-IR studies of the cluster.

ESO/VISTA 4m Telescope + VIRCAM


Local collaborators

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IAC-TCS (Spain)

Aparicio, A.

Guerrero de Escalant, E. M.

Milone, A. - Murgas, F.

Hidalgo, S. - Tata, R.

NAOJ-IRSF (Japan)

Tamura, M. (VVV member)

Hashimoto, J.

Kuzuhara, N.

Kwon, J.

KASI-BOAO (Korea)

Young-Beom, J.

Han, J. - Sohn, J.

Sung, H.

de Grijs, R.

INAF REM (Italy)

Fiaschi, M. - Ochner, P.

Masetti, N. (VVV member)

Tomasella, L.

Siviero, A.

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The primary goal of the VVV Templates Project is to build

a statistically significant database of IR light curves for the

automated classification of the VVV variable stars

Active learning for light curves classification

Next talk, by Cristobal Berger

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To stay tuned…

http://www.vvvtemplates.org

the vvv templates project - rodolfo angeloni's webpage › uploads › 6 › 0 › 7 › 8 ›...

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