Browsing by Author "Valenzuela, C."
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- 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....
- ItemAnalyzing the potential for solar thermal energy utilization in the Chilean copper mining industry(2020) Quinones, G.; Felbol, C.; Valenzuela, C.; Cardemil Iglesias, José Miguel; Escobar Moragas, Rodrigo
- ItemCSP plus PV hybrid solar plants for power and water cogeneration in northern Chile(2017) Valenzuela, C.; Mata Torres, Carlos Enrique; Cardemil Iglesias, José Miguel; Escobar Moragas, Rodrigo
- ItemDietary Inclusion of Monosodium Glutamate in Gestating and Lactating Sows Modifies the Preference Thresholds and Sensory-Motivated Intake for Umami and Sweet Solutions in Post-Weaned Pigs(2019) Guzman-Pino, S.A.; Lazcano, C.; De Luca, V.; Figueroa Hamed, Jaime; Valenzuela, C.; Roura, E.
- ItemInsulin Induces Relaxation and Decreases Hydrogen Peroxide-Induced Vasoconstriction in Human Placental Vascular Bed in a Mechanism Mediated by Calcium-Activated Potassium Channels and L-Arginine/Nitric Oxide Pathways(2016) Cabrera, L.; Saavedra Zamora, Álvaro Andrés; Rojas, S.; Cid, M.; Valenzuela, C.; Gallegos, D.; Careaga, P.; Basualto, E.; Haensgen, A.; Pena, E.; Rivas, C.; Vera, J.; Gallardo, V.; Zuniga, L.; Escudero, C.; Sobrevía Luarte, Luis Alberto; Wareing, M.; Gonzalez, M.
- ItemProtective mechanisms of S. lycopersicum aqueous fraction (Nucleosides and Flavonoids) on platelet activation and thrombus formation: In vitro, ex vivo and in vivo studies(2013) Pereira Garcés, Jaime Ignacio; Fuentes, E.; Alarcón, M.; Valenzuela, C.; Pérez, P.; Astudillo, L.; Palomo, I.
- ItemTransient Classification Report for 2020-12-01(2020) Dodin, A.; Tsvetkov, D.; Shatski, N.; Belinski, A.; Galbany, L.; Munoz-Arancibia, A.; Forster, F.; Bauer, F. E.; Hernandez-Garcia, L.; Pignata, G.; Camacho, E.; Silva-Farfan, J.; Mourao, A.; Arredondo, J.; Cabrera-Vives, G.; Carrasco-Davis, R.; Estevez, P. A.; Huijse, P.; Reyes, E.; Reyes, I.; Sanchez-Saez, P.; Valenzuela, C.; Castillo, E.; Ruz-Mieres, D.; Rodriguez-Mancini, D.; Catelan, Marcio; Eyheramendy, S.; Graham, M. J.F. Forster, F.E. Bauer, G. Pignata, J. Arredondo, G. Cabrera-Vives, R. Carrasco-Davis, P.A. Estevez, P. Huijse, E. Reyes, I. Reyes, P. Sanchez-Saez, C. Valenzuela, E. Castillo, D. Ruz-Mieres, D. Rodriguez-Mancini, F.E. Bauer, M. Catelan, S. Eyheramendy, M.J. Graham on behalf of the ALeRCE broker report/s the discovery of a new astronomical transient.
- ItemValidation of the Factorial Structure of Social Capital in Youth Involved in Prosocial and Political Organizations(2020) Valenzuela, C.; Martínez Guzmán, María Loreto; Cumsille E., Patricio
- ItemWine grape pomace flour in broiler diets effects growth and some meat characteristics(2020) Reyes, P.; Urquiaga Reus, Inés; Echeverría Errázuriz, Guadalupe; Duran, E.; Morales, M. S.; Valenzuela, C.