Simón Torres
A5068466720- Inorganic Fluorides and Related Compounds
- Superconducting Materials and Applications
- Gamma-ray bursts and supernovae
- Physics of Superconductivity and Magnetism
- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Inorganic Chemistry and Materials
- Astrophysics and Cosmic Phenomena
- Semiconductor Lasers and Optical Devices
- Gyrotron and Vacuum Electronics Research
- Photonic and Optical Devices
- Astronomical Observations and Instrumentation
- Advanced Fiber Optic Sensors
- Advanced Data Compression Techniques
- Astrophysical Phenomena and Observations
- Pulsars and Gravitational Waves Research
- Astro and Planetary Science
- Cancer-related Molecular Pathways
- Radio Astronomy Observations and Technology
- Adaptive optics and wavefront sensing
- Atomic and Subatomic Physics Research
- Microwave Engineering and Waveguides
- Image and Signal Denoising Methods
- Superconducting and THz Device Technology
- Solid-state spectroscopy and crystallography
Southern Astrophysical Research Telescope
2017-2024
Las Campanas Observatory
2017-2020
Carnegie Institution for Science
2020
We present final natural system optical (ugriBV) and near-infrared (YJH) photometry of 134 supernovae (SNe) with probable white dwarf progenitors that were observed in 2004-2009 as part the first stage Carnegie Supernova Project (CSP-I). The sample consists 123 Type Ia SNe, 5 Iax 2 super-Chandrasekhar SN candidates, SNe interacting circumstellar matter, 2006bt-like events. redshifts objects range from z = 0.0037 to 0.0835; median redshift is 0.0241. For 120 (90%) these was obtained. Average...
The Carnegie Supernova Project-II (CSP-II) was an NSF-funded, four-year program to obtain optical and near-infrared observations of a "Cosmology" sample ∼100 Type Ia supernovae located in the smooth Hubble flow (0.03 ≲ z 0.10). Light curves were also obtained "Physics" composed 90 nearby at ≤ 0.04 selected for spectroscopic timeseries observations. primary emphasis CSP-II is use combination photometry achieve distance precision better than 5%. In this paper, details supernova sample,...
We present an analysis of the final data release Carnegie Supernova Project I, focusing on absolute calibration luminosity-decline-rate relation for Type Ia supernovae (SNeIa) using new intrinsic color relations with respect to color-stretch parameter, $s_{BV}$, enabling improved dust extinction corrections. investigate what degree so-called fast-declining SNeIa can be used determine accurate extragalactic distances. estimate scatter in relation, and find it ranges from $\pm 0.13$ mag 0.18$...
We present an analysis of ultraviolet (UV) to near-infrared observations the fast-declining Type Ia supernovae (SNe Ia) 2007on and 2011iv, hosted by Fornax cluster member NGC 1404. The B-band light curves SN 2011iv are characterised dm_15(B) decline-rate values 1.96 mag 1.77 mag, respectively. Although they have similar decline rates, their peak B- H-band magnitudes differ ~0.60 ~0.35 After correcting for luminosity vs. rate colour relations, provide distances that ~14% ~9%, These findings...
Abstract We present an analysis of Type Ia supernovae (SNe Ia) from the Carnegie Supernova Project I and II extend Hubble diagram optical to near-infrared wavelengths ( uBgVriYJH ). calculate constant, H 0 , using various distance calibrators: Cepheids, tip red giant branch (TRGB), surface brightness fluctuations (SBFs). Combining all methods calibration, we derive = 71.76 ± 0.58 (stat) 1.19 (sys) km s −1 Mpc B band 73.22 0.68 1.28 band. By assigning equal weight Cepheid, TRGB, SBF...
The first phase of the Carnegie Supernova Project (CSP-I) was a dedicated supernova follow-up program based at Las Campanas Observatory that collected science data young, low-redshift supernovae between 2004 and 2009. Presented in this paper is CSP-I photometric release stripped-envelope core-collapse supernovae. consist optical (uBgVri) photometry 34 objects, with subset 26 having near-infrared (YJH) photometry. Twenty objects have pre-maximum coverage 12 beginning least five days prior to...
We present an analysis of Type Ia Supernovae (SNe~Ia) from both the Carnegie Supernova Project~I (CSP-I) and II (CSP-II), extend Hubble diagram optical to near-infrared wavelengths ($uBgVriYJH$). calculate constant, $H_0$, using various distance calibrators: Cepheids, Tip Red Giant Branch (TRGB), Surface Brightness Fluctuations (SBF). Combining all methods calibrations, we derive $\rm H_0=71.76 \pm 0.58 \ (stat) 1.19 (sys) km s^{-1} Mpc^{-1}$ $B$-band, H_0=73.22 0.68 1.28 $H$-band. By...
We present the second and final release of optical spectroscopy Type Ia Supernovae (SNe Ia) obtained during first phases Carnegie Supernova Project (CSP-I CSP-II). The newly released data consist 148 spectra 30 SNe observed in course CSP-I, 234 127 CSP-II. also 216 46 historical Ia, including 53 by Cal\'an/Tololo Survey. combine these observations with previously published CSP publicly-available to compile a large sample measurements spectroscopic parameters at maximum light, consisting...
We present multi-wavelength observations of two gap transients followed by the Carnegie Supernova Project-II and supplemented with data obtained a number different programs. Here in first papers, we focus on intermediate luminosity red transient (ILRT) designated SNhunt120, while companion paper examine luminous novae AT 2014ej. Our set for SNhunt120 consists an early optical discovery, estimated to be within 3 days after outburst, subsequent near-infrared broadband followup extending over...
We present optical and near-infrared broadband photometry spectra of AT 2014ej from the Carnegie Supernova Project-II. These observations are complemented with data CHilean Automatic sEarch, Public ESO Spectroscopic Survey Transient Objects, Backyard Observatory Search. Observational signatures reveal that it is similar to other members gap-transient subclass known as luminous red novae (LRNe), including ubiquitous double hump light curve spectral properties akin LRN SN 2017jfs. A...
Gravitational lensing provides unique insights into astrophysics and cosmology, including the determination of galaxy mass profiles constraining cosmological parameters. We present spectroscopic confirmation lens modeling strong system DESI-253.2534+26.8843, discovered in Dark Energy Spectroscopic Instrument (DESI) Legacy Imaging Surveys data. This consists a massive elliptical surrounded by four blue images forming an Einstein Cross pattern. obtained observations this using Multi Unit...
Type II supernovae (SNeII) mark the endpoint in lives of hydrogen-rich massive stars. Their large explosion energies and luminosities allow us to measure distances, metallicities, star formation rates into distant Universe. To fully exploit their use answering different astrophysical problems, high-quality low-redshift data sets are required. Such samples vital understand physics SNeII, but also serve as calibrators for distinct - often lower-quality samples. We present uBgVri optical YJH...
Gravitational lensing provides unique insights into astrophysics and cosmology, including the determination of galaxy mass profiles constraining cosmological parameters. We present spectroscopic confirmation lens modeling strong system DESI-253.2534+26.8843, discovered in Dark Energy Spectroscopic Instrument (DESI) Legacy Imaging Surveys data. This consists a massive elliptical surrounded by four blue images forming an Einstein Cross pattern. obtained observations this using Multi Unit...
We have performed a near-infrared photometric monitoring of 39 galactic young star clusters and star-forming regions, known as {\em NIP Stars}, between the years 2009--2011, using Swope telescope at Las Campanas Observatory (Chile) RetroCam camera. The primary objective campaign is to perform census variability such discover massive eclipsing binary stars. In this work, we describe general idea, implementation survey, first preliminary results some observed clusters. This program...
We are carrying out a bibliographic compilation of near-infrared (NIR)(0.7-5.0 um) spectroscopic studies available for stars in the Galactic O Star Catalog (GOSC, Maíz Apellániz et al. 2004). This allows us to quantify precise degree knowledge about NIR spectral information GOSC sources, such as band coverage, resolution, equivalent-width measurements, etc. has clear next step toward development new catalog O-type observed only NIR, which will be annexed GOSC. In this poster paper we present...