Iskanje po repozitoriju

A+ | A- | | SLO | ENG

Opis: The intermediate Palomar Transient Factory (ATel #4807) reports the discovery and classification of the following Type Ia SNe. Our automated candidate vetting to distinguish a real astrophysical source (1.0) from bogus artifacts (0.0) is powered by three generations of machine learning algorithms: RB2 (Brink et al. 2013MNRAS.435.1047B), RB4 (Rebbapragada et al. 2015AAS...22543402R) and RB5 (Wozniak et al. 2013AAS...22143105W).
Ključne besede: Supernovae, Transient
Objavljeno v RUNG: 23.01.2018; Ogledov: 4245; Prenosov: 0
Gradivo ima več datotek! Več...

Opis: We report the detection of a young supernova, designated as iPTF16auf, at RA=14:31:09.26 and Dec=+27:14:09.8 (J2000), in the vicinity of the star forming galaxy MRK 685 at spectroscopic redshift 0.015.
Ključne besede: Supernova iPTF16auf
Objavljeno v RUNG: 23.01.2018; Ogledov: 3221; Prenosov: 0
Gradivo ima več datotek! Več...

Opis: The intermediate Palomar Transient Factory (ATel #4807) reports the discovery and classification of the following Type Ia SNe. Our automated candidate vetting to distinguish a real astrophysical source (1.0) from bogus artefacts (0.0) is powered by three generations of machine learning algorithms: RB2 (Brink et al. 2013MNRAS.435.1047B), RB4 (Rebbapragada et al. 2015AAS...22543402R) and RB5 (Wozniak et al. 2013AAS...22143105W).
Ključne besede: Supernovae, Transient
Objavljeno v RUNG: 23.01.2018; Ogledov: 3552; Prenosov: 0
Gradivo ima več datotek! Več...

Opis: The intermediate Palomar Transient Factory (ATel #4807) reports the discovery of the following bright transients. We report as ATel alerts all objects brighter than 19 mag. Our discoveries are reported in two filters: sdss-g and Mould-I, denoted as g, and I. Both are in the AB magnitude system.
Ključne besede: Supernovae, Transient
Objavljeno v RUNG: 23.01.2018; Ogledov: 3499; Prenosov: 0
Gradivo ima več datotek! Več...

Opis: Modern wide-field, optical time-domain surveys must solve a basic optimization problem: maximize the number of transient discoveries or minimize the follow-up needed for the new discoveries. Here, we describe the Color Me Intrigued experiment, the first from the intermediate Palomar Transient Factory (iPTF) to search for transients simultaneously in the gPTF and RPTF bands. During the course of this experiment, we discovered iPTF 16fnm, a new member of the 02cx-like subclass of Type Ia supernovae (SNe). iPTF 16fnm peaked at Mg 15.09 0.17 mag PTF =-  , making it the second-least-luminous known SN Ia. iPTF 16fnm exhibits all the hallmarks of the 02cx-like class: (i) low luminosity at peak, (ii) low ejecta velocities, and (iii) a non-nebular spectrum several months after peak. Spectroscopically, iPTF 16fnm exhibits a striking resemblance to two other low-luminosity 02cx-like SNe: SN 2007qd and SN 2010ae. iPTF 16fnm and SN 2005hk decline at nearly the same rate, despite a 3 mag difference in brightness at peak. When considering the full subclass of 02cx-like SNe, we do not find evidence for a tight correlation between peak luminosity and decline rate in either the g′ or r′ band. We measure the relative rate of 02cx-like SNe to normal SNe Ia and find rN N 02 Ia cx = 33- + 25 158%. We further examine the g′ − r′ evolution of 02cx-like SNe and find that their unique color evolution can be used to separate them from 91bg-like and normal SNe Ia. This selection function will be especially important in the spectroscopically incomplete Zwicky Transient Facility/Large Synoptic Survey Telescope (LSST) era. Finally, we close by recommending that LSST periodically evaluate, and possibly update, its observing cadence to maximize transient science.
Ključne besede: methods: observational – surveys – supernovae: general – supernovae: individual (SN 2002cx, SN 2005hk, iPTF 16fnm)
Objavljeno v RUNG: 23.01.2018; Ogledov: 3719; Prenosov: 0
Gradivo ima več datotek! Več...