A5022115274- Gamma-ray bursts and supernovae
- Astrophysics and Cosmic Phenomena
- Stellar, planetary, and galactic studies
- Pulsars and Gravitational Waves Research
- Astrophysical Phenomena and Observations
- Astronomy and Astrophysical Research
- Astro and Planetary Science
- CCD and CMOS Imaging Sensors
- Adaptive optics and wavefront sensing
- Astronomical Observations and Instrumentation
- Galaxies: Formation, Evolution, Phenomena
Las Campanas Observatory
2017-2024
University of Antofagasta
2020-2024
Carnegie Institution for Science
2018-2020
Carnegie Observatories
2018
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$...
Abstract We present an analysis of Type Ia supernovae (SNe Ia) from the Carnegie Supernova Project I and II extend Hubble diagram optical to near-infrared wavelengths ( uBgVriYJH ). calculate constant, H 0 , using various distance calibrators: Cepheids, tip red giant branch (TRGB), surface brightness fluctuations (SBFs). Combining all methods calibration, we derive = 71.76 ± 0.58 (stat) 1.19 (sys) km s −1 Mpc B band 73.22 0.68 1.28 band. By assigning equal weight Cepheid, TRGB, SBF...
The first phase of the Carnegie Supernova Project (CSP-I) was a dedicated supernova follow-up program based at Las Campanas Observatory that collected science data young, low-redshift supernovae between 2004 and 2009. Presented in this paper is CSP-I photometric release stripped-envelope core-collapse supernovae. consist optical (uBgVri) photometry 34 objects, with subset 26 having near-infrared (YJH) photometry. Twenty objects have pre-maximum coverage 12 beginning least five days prior to...
We present a multi-wavelength photometric and spectroscopic analysis of thirteen "Super-Chandrasekhar Mass"/2003fg-like type Ia Supernova (SNe~Ia). Nine these objects were observed by the Carnegie Project. 2003fg-like have slowly declining light curves ($\Delta m_{15}$(B) $<$1.3 mag), peak absolute $B$-band magnitudes between $-19<M_{B}<-21$~mag. Many are located in same part luminosity width relation as normal SNe~Ia. In optical $B$ $V$ bands, look like SNe~Ia, but at redder wavelengths...
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...
Four observations of Starlink's LEO communication satellites, Darksat and STARLINK-1113, were conducted on two nights with telescopes. The Chakana 0.6\,m telescope at the Ckoirama observatory (Chile) observed both satellites 5\,Mar\,2020 (UTC) 7\,Mar\,2020 using a Sloan r' i' filter, respectively. ESO VISTA 4.1\,m VIRCAM instrument in NIR J-band Ks-band, calibration, image processing, analysis images give r\,$\approx$\,5.6\,mag, i\,$\approx$\,5.0\,mag, J\,$\approx$\,4.2\,mag,...
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 an early-phase $g$-band light curve and visual-wavelength spectra of the normal Type Ia supernova (SN) 2013gy. The is constructed by determining appropriate S-corrections to transform KAIT natural-system $B$- $V$-band photometry Carnegie Supernova Project Pan-STARRS1 natural photometric system. A Markov Chain Monte Carlo calculation provides a best-fit single power-law function first ten epochs described exponent $2.16^{+0.06}_{-0.06}$ time MJD 56629.4$^{+0.1}_{-0.1}$, which...
We present photometric and spectroscopic observations of the 03fg-like type Ia supernova (SN Ia) ASASSN-15hy from ultraviolet (UV) to near-infrared (NIR). shares many hallmark characteristics SNe Ia, previously referred as "super-Chandrasekhar" Ia. It is bright in UV NIR, lacks a clear i-band secondary maximum, shows strong persistent C II feature, has low Si $\lambda$6355 velocity. However, some its properties are also extreme among subgroup. under-luminous...
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...
Measure the Sloan g' magnitudes of Starlink's STARLINK-1130 (Darksat) and 1113 LEO communication satellites determine effectiveness Darksat darkening treatment at 475.4\,nm. Two observations satellite were conducted on 2020/02/08 2020/03/06 using a r' filter respectively. While second satellite, STARLINK-1113 was observed filter. The initial observation test when still manoeuvring to its nominal orbit orientation. Based successful observation, first main along with an Starlink satellite....
Type II supernovae (SNe II) 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 SNe II, but also serve as calibrators for distinct -- often lower-quality samples. We present $uBgVri$ optical...
SN 2017jgh is a type IIb supernova discovered by Pan-STARRS during the C16/C17 campaigns of Kepler/K2 mission. Here we present and ground based observations 2017jgh, which captured shock cooling progenitor breakout with an unprecedented cadence. This event presents unique opportunity to investigate progenitors stripped envelope supernovae. By fitting analytical models lightcurve, find that was likely yellow supergiant radius $\sim50-290~R_{\odot}$, mass $\sim0-1.7~M_{\odot}$. had velocity...
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...