Browsing by Author "Catelan, Márcio"
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- ItemA Data-driven Study of RR Lyrae Near-IR Light Curves: Principal Component Analysis, Robust Fits, and Metallicity Estimates(2018) Hajdu, Gergely; Dekany, Istvan; Catelan, Márcio; Grebel, Eva K.; Jurcsik, Johanna
- ItemA deep near-infrared view of the Galactic globular cluster 2 MASS GC 02(2007) Borissova, J.; Catelan, Márcio; Minniti, D.
- ItemA fork in the Sagittarius trailing debris(2017) Navarrete Silva, Camila Andrea; Belokurov, V; Koposov, S; Irwin, M; Catelan, Márcio; Duffau, S; Drake, A
- ItemA HOT HORIZONTAL BRANCH STAR WITH A CLOSE K-TYPE MAIN-SEQUENCE COMPANION(2015) Bidin, C. Moni; Momany, Y.; Montalto, M.; Catelan, Márcio; Villanova, S.; Piotto, G.; Geisler, D.
- ItemA low surface brightness halo surrounding the globular cluster NGC 5694(2011) Correnti, M.; Catelan, Márcio
- ItemA machine learned classifier for RR Lyrae in the VVV survey(2016) Elorrieta López, Felipe; Eyheramendy Duerr, Susana; Jordán Colzani, Andrés Cristóbal; Dekany, Istvan; Catelan, Márcio; Angeloni, Rodolfo; Alonso, J.; Contreras, R.; Gran, F.; Hajdu, G.; Espinoza, N.; Saito, R.; Minniti, D.
- ItemA misidentified RR Lyrae variable star in omega Centauri(2013) Navarrete Silva, Camila Andrea; Catelan, Márcio; Contreras Ramos, Rodrigo Andrés; Alonso Garcia, J.; Dekany, Istvan; Gran Merino, Felipe Eduardo; Hempel, Maren; Angeloni, Rodolfo
- 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.
- ItemA Near-infrared RR Lyrae Census along the Southern Galactic Plane: The Milky Way's Stellar Fossil Brought to Light(2018) Dekany, Istvan; Hajdu, Gergely; Grebel, Eva K.; Catelan, Márcio; Elorrieta López, Felipe; Eyheramendy Duerr, Susana; Majaess, Daniel; Jordán Colzani, Andrés Cristóbal
- ItemA New Lower Main Sequence Eclipsing Binary with Detached Components(2009) Rozyczka, M.; Pietrukowicz, Pawel; Catelan, Márcio
- ItemA search for dormant binaries with degenerate components in omega Centauri and NGC 6397(2010) Rozyczka, M.; Pietrukowicz, Pawel; Catelan, Márcio
- ItemA semi-empirical study of the mass distribution of horizontal branch stars in M 3 (NGC 5272)(2008) Valcarce Bravo, Aldo Alfonso Raúl; Catelan, Márcio
- ItemA VIMOS spectroscopy study of photometric variables and straggler candidates in omega Centauri(2012) Rozyczka, M.; Pietrukowicz, Pawel; Catelan, Márcio
- 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.
- ItemAlert Classification for the ALeRCE Broker System: The Real-time Stamp Classifier(2021) Carrasco-Davis, R.; Reyes, E.; Valenzuela, C.; Förster, F.; Estévez, P. A.; Pignata, G.; Bauer, F. E.; Reyes, I.; Sánchez-Sáez, P.; Cabrera-Vives, G.; Eyheramendy, S.; Catelan, Márcio; Arredondo, J.; Castillo-Navarrete, E.; Rodríguez-Mancini, D.; Ruz-Mieres, D.; Moya, A.; Sabatini-Gacitúa, L.; Sepúlveda-Cobo, C.; Mahabal, A. A.; Silva-Farfán, J.; Camacho-Iñiguez, E.; Galbany, L.We present a real-time stamp classifier of astronomical events for the Automatic Learning for the Rapid Classification of Events broker, ALeRCE. The classifier is based on a convolutional neural network, trained on alerts ingested from the Zwicky Transient Facility (ZTF). Using only the science, reference, and difference images of the first detection as inputs, along with the metadata of the alert as features, the classifier is able to correctly classify alerts from active galactic nuclei, supernovae (SNe), variable stars, asteroids, and bogus classes, with high accuracy (~94%) in a balanced test set. In order to find and analyze SN candidates selected by our classifier from the ZTF alert stream, we designed and deployed a visualization tool called SN Hunter, where relevant information about each possible SN is displayed for the experts to choose among candidates to report to the Transient Name Server database. From 2019 June 26 to 2021 February 28, we have reported 6846 SN candidates to date (11.8 candidates per day on average), of which 971 have been confirmed spectroscopically. Our ability to report objects using only a single detection means that 70% of the reported SNe occurred within one day after the first detection. ALeRCE has only reported candidates not otherwise detected or selected by other groups, therefore adding new early transients to the bulk of objects available for early follow-up. Our work represents an important milestone toward rapid alert classifications with the next generation of large etendue telescopes, such as the Vera C. Rubin Observatory....
- ItemAn Algorithm for the Visualization of Relevant Patterns in Astronomical Light Curves(2019) Pieringer Baeza, Christian Philip; Pichara Baksai, Karim Elías; Catelan, Márcio; Protopapas, Pavlos
- ItemAn AO-assisted variability study of four globular clusters(2016) Salinas, R.; Contreras Ramos, Rodrigo Andrés; Strader, J.; Hakala, P.; Catelan, Márcio; Peacock, M. B.; Simunovic , M.
- 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.
- ItemAN OVERVIEW OF THE ROTATIONAL BEHAVIOR OF METAL-POOR STARS(2009) Cortés, C.; Catelan, Márcio
- ItemAn Updated Catalog of 4680 Northern Eclipsing Binaries with Algol-type Light-curve Morphology in the Catalina Sky Surveys(2018) Papageorgiou, Athanasios; Catelan, Márcio; Christopoulou, Panagiota-Eleftheria; Drake, Andrew J.; Djorgovski, S. G.