Browsing by Author "Kurtev, R."
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- ItemA colour-excess extinction map of the southern Galactic disc from the VVV and GLIMPSE surveys(2019) Soto, M.; Barba, R.; Minniti, D.; Kunder, A.; Majaess, D.; Nilo Castellon, J. L.; Alonso García, J.; Leone, G.; Contreras Ramos, Rodrigo Andrés; Hempel, Maren; Morelli, Lorenzo; Haikala, L.; Firpo, V.; Lucas, P.; Emerson, J. P.; Bidin, C. M.; Geisler, D.; Saito, R. K.; Gurovich, S.; Rejkuba, M.; Barbieri, M.; Román Lopes, A.; Alonso, M. V.; Baravalle, L. D.; Borissova, J.; Kurtev, R.; Milla, F
- ItemA near-infrared catalogue of the Galactic novae in the VVV survey area(2013) Kalbusch Saito, Roberto; Minniti, D.; Angeloni, Rodolfo; Catelan, Márcio; Beamin, J. C.; Borissova, J.; Dekany, Istvan; Kerins, E.; Kurtev, R.; Mennickent, R. E.
- ItemAlert Classification for the ALeRCE Broker System: The Light Curve Classifier(2021) Sánchez-Sáez, P.; Reyes, I.; Valenzuela, C.; Förster, F.; Eyheramendy, S.; Elorrieta, F.; Bauer, F. E.; Cabrera-Vives, G.; Estévez, P. A.; Catelan, Márcio; Pignata, G.; Huijse, P.; De Cicco, D.; Arévalo, P.; Carrasco-Davis, R.; Abril, J.; Kurtev, R.; Borissova, J.; Arredondo, J.; Castillo-Navarrete, E.; Rodríguez, D.; Ruz-Mieres, D.; Moya, A.; Sabatini-Gacitúa, L.; Sepúlveda-Cobo, C.; Camacho-Iñiguez, E.
- ItemAn automated tool to detect variable sources in the vista variables in the vía láctea survey : the VVV variables (V4) catalog of tiles d001 and d002(2018) Medina, N.; Borissova, J.; Bayo, A.; Kurtev, R.; Navarro Molina, C.; Kuhn, M.; Kumar, N.; Lucas, P.W.; Catelan, Márcio; Minniti, D.; Smith, L. C.
- ItemDiscovery of a brown dwarf companion to the A3V star beta Circini(2015) Smith, L.; Lucas, P.; Pena, C.; Kurtev, R.; Marocco, F.; Jones, H.; Beamin Muhlenbrock, Juan Carlos; Napiwotzki, R.; Borissova, J.; Burningham, B.; Faherty, J.; Pinfield, D.; Gromadzki, M.; Ivanov, V.; Minniti, D.; Stimson, W.; Villanueva, V.
- ItemDiscovery of VVV CL001 A low-mass globular cluster next to UKS 1 in the direction of the Galactic bulge(EDP SCIENCES S A, 2011) Minniti, D.; Hempel, M.; Toledo, I.; Ivanov, V. D.; Alonso Garcia, J.; Saito, R. K.; Catelan, M.; Geisler, D.; Jordan, A.; Borissova, J.; Zoccali, M.; Kurtev, R.; Carraro, G.; Barbuy, B.; Claria, J.; Rejkuba, M.; Emerson, J.; Moni Bidin, C.Context. It is not known how many globular clusters may remain undetected towards the Galactic bulge.
- ItemEstudio infrarrojo de cúmulos inmersos en l = 345°(2011) Baume, G.; Feinstein, C.; Borissova, J.; Kurtev, R.; Chené, A. -N.; Moni Bidin, C.; Mauro, F.; Bonatto, C.; Bica, E.; Clarke, J. R. A.; Catelan, Márcio; Geisler, D.; Minniti, D.; Lucas, P. W.We have studied several embedded star clusters located in the fourth quad- rant of the Galactic plane (l 345 ; b +1.5 ). Data involves photometry and infrared spectroscopy (bands JHK and low dispersion respectively). This analysis has yielded a preliminary estimate of the fundamental param- eters of these objects and the behavior of the interstellar medium in this Galactic direction. FULL TEXT IN SPANISH...
- ItemInvestigando cúmulos estelares masivos con el VVV(2011) Chené, A. -N.; Clarke, J. R. A.; Borissova, J.; Moni Bidin, C.; Mauro, F.; Bonatto, C.; Kurtev, R.; Baume, G.; Feinstein, C.; Minniti, D.; Catelan, Márcio; Lucas, P. W.; Geisler, D.Preliminary results are presented for the study of infrared data of three mas- sive stellar clusters. Have been combined photometric observations (JHK; VVV project = Vista Variables in the Vía Láctea) and spectroscopic (follow- up) observations of the brightest stars in these clusters. In this way we have been able to refine the values of distance, reddening, age and masses of the involved objects. FULL TEXT IN SPANISH...
- ItemLong-term stellar variability in the Galactic Centre region(2019) Molina, C.N.; Borissova, Jordanka Hristova; Catelan, Márcio; Lucas, P.W.; Medina, N.; Pena, C.C.; Kurtev, R.; Minniti, D.
- ItemMassive open star clusters using the VVV survey IV. WR 62-2, a new very massive star in the core of the VVV CL041 cluster(2015) Chene, A.; Ramírez, S.; Borissova, J.; O'Leary, E.; Martins, F.; Herve, A.; Kuhn, M.; Kurtev, R.; Amigo, P.; Minniti, D.; Bonatto, C.
- ItemMassive open star clusters using the VVV survey. III. A young massive cluster at the far edge of the Galactic bar(2014) Ramírez Alegría, S.; Borissova, J.; Chené, A. N.; O'Leary, E.; Amigo, P.; Minniti, D.; Saito, R. K.; Geisler, D.; Kurtev, R.; Hempel, M.; Gromadzki, M.; Clarke, J. R. A.; Negueruela, I.; Marco, A.; Fierro, C.; Bonatto, C.; Catelan, MárcioContext. Young massive clusters are key to map the Milky Way's structure, and near-infrared large area sky surveys have contributed strongly to the discovery of new obscured massive stellar clusters. Aims: We present the third article in a series of papers focused on young and massive clusters discovered in the VVV survey. This article is dedicated to the physical characterization of VVV CL086, using part of its OB-stellar population. Methods: We physically characterized the cluster using JHKS near-infrared photometry from ESO public survey VVV images, using the VVV-SkZ pipeline, and near-infrared K-band spectroscopy, following the methodology presented in the first article of the series. Results: Individual distances for two observed stars indicate that the cluster is located at the far edge of the Galactic bar. These stars, which are probable cluster members from the statistically field-star decontaminated CMD, have spectral types between O9 and B0 V. According to our analysis, this young cluster (1.0 Myr < age < 5.0 Myr) is located at a distance of 11+5-6 kpc, and we estimate a lower limit for the cluster total mass of (2.8+1.6-1.4) · 103 M⊙. It is likely that the cluster contains even earlier and more massive stars. Based on observations taken within the ESO VISTA Public Survey VVV (programme ID 179.B-2002), and with ISAAC, VLT, ESO (programme 087.D-0341A).Near-IR photometry of the most probable cluster members is only available at the CDS via anonymous ftp to http://cdsarc.u-strasbg.fr (ftp://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/564/L9...
- ItemNear-infrared photometry and spectroscopy of the low Galactic latitude globular cluster 2MASS-GC 03(2016) Carballo Bello, Julio A.; Ramírez Alegría, S.; Borissova, J.; Smith, L. C.; Kurtev, R.; Lucas, P. W.; Moni Bidin, Ch.; Alonso García, J.; Minniti, D.; Palma, T.; Dekany, Istvan
- ItemNew Galactic star cluster candidates discovered in the VVV Survey within 10 degrees around the Galactic center(2011) Borissova, J.; Clarke, J. R. A.; Bonatto, C.; Chené, A. -N.; Bica, E.; Kurtev, R.; Barbá, R.; Minniti, D.; Peñaloza, F.; Catelan, Márcio; Lucas, P. W.; Mauro, F.; Moni Bidin, C.; Geisler, D.; Ivanov, V. D.; Baume, G.; Feinstein, C.We report the discovery of 57 new infrared open cluster candidates and stel- lar groups in the inner 10 degrees around the Galactic center. The newly dis- covered candidates are found by visual inspection of near infrared images observed under the Vista Variables in the Via Lactea (VVV) ESO Large Public Survey. The preliminary analysis shows that approximately 1/3 of them are younger than 10 Myrs....
- ItemNew galactic star clusters discovered in the disc area of the VVVX survey(2018) Borissova, J.; Ivanov, V.D.; Lucas, P.W.; Kurtev, R.; Alonso Garcia, J.; Ramírez Alegría, S.; Minniti, D.; Froebrich, D.; Hempel, Maren; Medina, N.; Chené, A.N.; Kuhn, M.A.
- ItemNew galactic star clusters discovered in the VVV survey. Candidates projected on the inner disk and bulge(2014) Borissova, J.; Chene, A.; Ramirez Alegria, S.; Sharma, S.; Clarke, J.; Kurtev, R.; Negueruela, I.; Minniti, D.; Catelan, Márcio; Hempel, Maren; Marco, A.; Amigo, P.
- ItemNew VVV Survey Globular Cluster Candidates in the Milky Way Bulge(2017) Minniti, D.; Geisler, D.; Alonso, J.; Palma, T.; Beamin, J.; Borissova, J.; Catelan, Márcio; Claria, J.; Hempel, Maren; Contreras Ramos, Rodrigo Andrés; Cohen, R.; Días, B.; Fernández, J.; Gómez, M.; Ivanov, V.; Kurtev, R.
- ItemPersistent and occasional: Searching for the variable population of the ZTF/4MOST sky using ZTF Data Release 11(2023) Sánchez-Sáez, P.; Arredondo, J.; Bayo, A.; Arévalo, P.; Bauer, F. E.; Cabrera-Vives, G.; Catelan, Márcio; Coppi, P.; Estévez, P. A.; Förster, F.; Hernández-García, L.; Huijse, P.; Kurtev, R.; Lira, P.; Muñoz Arancibia. A. M.; Pignata, G.
- ItemProper motions and brown dwarfs in the VVV survey(2014) Beamín Muhlenbrock, Juan Carlos; Minniti, Dante; Gromadzki, M.; Kurtev, R.; Ivanov, V. D.; Peña Ramírez, Karla Yulien; Saito, R. K.; Borissova, J.We use the first three years of observations of the VISTA Variables in the Via Lactea Survey, to create a catalog of high proper motion objects, and search for nearby objects, here we describe the initial results including the discovery the first brown dwarf in the VVV survey.
- ItemSpectrophotometric characterization of high proper motion sources from WISE(2015) Beamin, J. C.; Ivanov, V. D.; Minniti, D.; Smart, R. L.; Muzic, K.; Mendez, R. A.; Beletsky, Y.; Bayo, A.; Gromadzki, M.; Kurtev, R.
- ItemStellar variability in the VVV survey(2013) Catelan, Márcio; Minniti, D.; Lucas, P. W.; Dékány, I.; Saito, R. K.; Angeloni, Rodolfo; Alonso-García, J.; Hempel, M.; Helminiak, Krzysztof Grzegorz; Jordán, A.; Contreras Ramos, Rodrigo Andrés; Navarrete, C.; Beamin Muhlenbrock, Juan Carlos; Rojas, A. F.; Gran, F.; Ferreira Lopes, C. E.; Contreras Peña, Carlos Eduardo; Kerins, E.; Huckvale, L.; Rejkuba, M.; Cohen, R.; Mauro, F.; Borissova, J.; Amigo, P.; Eyheramendy Duerr, Susana; Pichara Baksai, Karim Elías; Espinoza, N.; Navarro, C.; Hajdu, G.; Calderón Espinoza, Diego Nicolás; Muro, G. A.; Andrews, H.; Motta, V.; Kurtev, R.; Emerson, J. P.; Moni Bidin, C.; Chené, A. -N.The Vista Variables in the Via Lactea (VVV) ESO Public Survey is an ongoing time-series, near-infrared (IR) survey of the Galactic bulge and an adjacent portion of the inner disk, covering 562 square degrees of the sky, using ESOs VISTA telescope. The survey has provided superb multi-color photometry in 5 broadband filters ($Z$, $Y$, $J$, $H$, and $K_s$), leading to the best map of the inner Milky Way ever obtained, particularly in the near-IR. The main variability part of the survey, which is focused on $K_s$-band observations, is currently underway, with bulge fields having been observed between 31 and 70 times, and disk fields between 17 and 36 times. When the survey is complete, bulge (disk) fields will have been observed up to a total of 100 (60) times, providing unprecedented depth and time coverage. Here we provide a first overview of stellar variability in the VVV data, including examples of the light curves that have been collected thus far, scientific applications, and our efforts towards the automated classification of VVV light curves....
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