A5087473550- Gamma-ray bursts and supernovae
- Astrophysics and Cosmic Phenomena
- Pulsars and Gravitational Waves Research
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Astrophysical Phenomena and Observations
- Astronomical Observations and Instrumentation
- Dark Matter and Cosmic Phenomena
- Geophysics and Gravity Measurements
- Neutrino Physics Research
- Galaxies: Formation, Evolution, Phenomena
- Solar and Space Plasma Dynamics
- Astro and Planetary Science
- Geochemistry and Geologic Mapping
- Adaptive optics and wavefront sensing
- Seismic Imaging and Inversion Techniques
- Nuclear Physics and Applications
- Geological and Geophysical Studies
- Geological Modeling and Analysis
- Particle Detector Development and Performance
- Radio Astronomy Observations and Technology
- Atmospheric Ozone and Climate
- Geophysical and Geoelectrical Methods
- Computational Physics and Python Applications
- Calibration and Measurement Techniques
Data61
2023-2024
Commonwealth Scientific and Industrial Research Organisation
2023-2024
The University of Sydney
2017-2023
ARC Centre of Excellence in Advanced Molecular Imaging
2022
Australian Research Council
2017-2022
The University of Western Australia
2021-2022
Australian National University
2011-2021
ARC Centre of Excellence for All-sky Astrophysics
2013-2020
Amirkabir University of Technology
2019
Mount Stromlo Observatory
2011-2018
We apply the reconstruction technique to clustering of galaxies from SDSS DR7 LRG sample, sharpening baryon acoustic oscillation (BAO) feature and achieving a 1.9% measurement distance z=0.35. This is first application BAO in galaxy redshift survey. update algorithm Eisenstein et al, 2007 account for effects survey geometry as well redshift-space distortions validate it on 160 LasDamas simulations. demonstrate that sharpens angle averaged correlation function, reducing nonlinear smoothing...
We present the first data release (DR1) of SkyMapper Southern Survey, a hemispheric survey carried out with Telescope at Siding Spring Observatory in Australia. Here, we strategy, processing, catalogue construction and database schema. The DR1 dataset includes over 66,000 images from Shallow Survey component, covering an area 17,200 deg$^2$ all six passbands $uvgriz$, while full covered by any passband exceeds 20,000 deg$^2$. catalogues contain 285 million unique astrophysical objects,...
We present photometric and spectroscopic observations of SN 2007if, an overluminous (MV = −20.4), red (B − V 0.16 at B-band maximum), slow-rising (trise 24 days) type Ia supernova (SN Ia) in a very faint (Mg −14.10) host galaxy. A spectrum 5 days past maximum light is direct match to the super-Chandrasekhar-mass candidate 2003fg, showing Si ii C ∼9000 km s−1. high signal-to-noise co-addition spectral time series reveals no Na i D absorption, suggesting negligible reddening galaxy, late-time...
The Public European Southern Observatory Spectroscopic Survey of Transient Objects (PESSTO) began as a public spectroscopic survey in April 2012. We describe the data reduction strategy and products which are publicly available through ESO archive Data Release 1 (SSDR1). PESSTO uses New Technology Telescope with EFOSC2 SOFI to provide optical NIR spectroscopy imaging. target supernovae transients brighter than 20.5mag for classification. Science targets then selected follow-up based on...
The discovery of the first electromagnetic counterpart to a gravitational wave signal has generated follow-up observations by over 50 facilities world-wide, ushering in new era multi-messenger astronomy. In this paper, we present event GW170817 and its SSS17a/DLT17ck (IAU label AT2017gfo) 14 Australian telescopes partner observatories as part Australian-based Australian-led research programs. We report early- late-time multi-wavelength observations, including optical imaging spectroscopy,...
We report Nearby Supernova Factory observations of SN 2005gj, the second confirmed case a "hybrid" Type Ia/IIn supernova. Our early-phase photometry 2005gj shows that interaction is much stronger than for prototype, 2002ic. first spectrum hot continuum with broad and narrow H-alpha emission. Later spectra, spanning over 4 months from outburst, show clear Ia features combined H-gamma, H-beta, HeI 5876,7065 in At higher resolution, P Cygni profiles are apparent. Surprisingly, we also observe...
We assemble a sample of 24 hydrogen-poor super-luminous supernovae (SLSNe). Parameterizing the light curve shape through rise and decline timescales shows that two are highly correlated. Magnetar-powered models can reproduce correlation, with diversity in rates driven by diffusion timescale. Circumstellar interaction exhibit similar rise-decline relation, but only for narrow range densities, which may be problematic these models. find SLSNe approximately 3.5 magnitudes brighter have curves 3...
We present results from a study of the photometric redshift performance Dark Energy Survey (DES), using early data Science Verification period observations in late 2012 and 2013 that provided science-quality images for almost 200 sq. deg. at nominal depth survey. assess (photo-z) about 15 000 galaxies with spectroscopic redshifts available other surveys. These are used, different configurations, as calibration sample, photo-z's obtained studied most existing photo-z codes. A weighting method...
We examine the relationship between Type Ia supernova (SN Ia) Hubble residuals and properties of their host galaxies using a sample 115 SNe from Nearby Supernova Factory. use galaxy stellar masses specific star formation rates fitted photometry for all hosts, as well gas-phase metallicities subset 69 star-forming (non-active galactic nucleus) to show that SN correlate with each these properties. With data we find new evidence correlation intrinsic color metallicity. When combine our those...
We present a sample of normal Type Ia supernovae (SNe Ia) from the Nearby Supernova Factory data set with spectrophotometry at sufficiently late phases to estimate ejected mass using bolometric light curve. measure 56Ni masses peak luminosity, then compare luminosity in 56Co-decay tail expected rate radioactive energy release ejecta given mass. infer Bayesian context semi-analytic model ejecta, incorporating constraints contemporary numerical models as priors on density structure and...
The ejected mass distribution of Type Ia supernovae (SNe Ia) directly probes progenitor evolutionary history and explosion mechanisms, with implications for their use as cosmological probes.Although the Chandrasekhar is a natural scale white dwarfs SNe Ia, models allowing to explode at other masses have attracted much recent attention.Using an empirical relation between light-curve width, we derive M ej 56 Ni sample 337 redshifts z < 0.7 used in analyses.We hierarchical Bayesian inference...
(Abridged) We study the host galaxy regions in close proximity to Type Ia supernovae (SNe Ia) analyze relations between properties of SN events and environments most similar where their progenitors formed. focus on local H\alpha\ emission as an indicator young environments. The Nearby Supernova Factory has obtained flux-calibrated spectral timeseries for SNe using integral field spectroscopy, allowing simultaneous measurement its immediate vicinity. For 89 we measure tracing ongoing star...
We present two hydrogen-rich superluminous supernovae (SLSNe), namely SN2013hx and PS15br. These objects, together with SN2008es are the only SLSNe showing a distinct, broad Halpha feature during photospheric phase also do not show any sign of strong interaction between fast-moving ejecta circumstellar shells in their early spectra. Despite PS15br peak luminosity is fainter than other spectrophotometric evolution similar to different supernova space. group all them as II hence distinct from...
OzDES is a five-year, 100-night, spectroscopic survey on the Anglo-Australian Telescope, whose primary aim to measure redshifts of approximately 2,500 Type Ia supernovae host galaxies over redshift range 0.1 < z 1.2, and derive reverberation-mapped black hole masses for 500 active galactic nuclei quasars 0.3 4.5. This treasure trove data forms major part follow-up Dark Energy Survey which we are also targeting cluster galaxies, radio strong lenses, unidentified transients, as well measuring...
The ensemble variability properties of nearly 23,000 quasars are studied using the Palomar-QUEST Survey. survey has covered 15,000 deg2 multiple times over 3.5 years seven optical filters, and been calibrated specifically for work. allows study rare objects epochs consistently calibrated, homogeneous data, obviating common problem generating comparable measurements from disparate data sets. A power-law fit to quasar structure function versus time yields an index 0.432 ± 0.024 our best...
We employ 76 type Ia supernovae with optical spectrophotometry within 2.5 days of B-band maximum light obtained by the Nearby Supernova Factory to derive impact Si and Ca features on intrinsic luminosity determine a dust reddening law. use equivalent width II {\lambda}4131 in place curve stretch account for first-order variability. The resultant empirical spectral law exhibits strong associated {\lambda}6355. After applying correction based H&K we find consistent Cardelli extinction Using...
We present a new atmospheric extinction curve for Mauna Kea spanning 3200--9700 \AA. It is the most comprehensive to date, being based on some 4285 standard star spectra obtained 478 nights spread over period of 7 years by Nearby SuperNova Factory using Integral Field Spectrograph. This mean and its dispersion can be used as an aid in calibrating spectroscopic or imaging data from Kea, estimating calibration uncertainty associated with use curve. Our method decomposing into physical...
We present a new method to standardize type Ia supernova (SN Ia) luminosities 0.13 mag using flux ratios from single flux-calibrated spectrum per SN. Using Nearby Supernova Factory spectrophotomery of 58 SNe Ia, we performed an unbiased search for that correlate with SN luminosity. After developing the and selecting best training sample, verified results on separate validation sample data literature. identified multiple whose correlations luminosity are stronger than those light curve shape...
The light curves of Type Ia supernovae (SNe Ia) are powered by the radioactive decay $^{56}$Ni to $^{56}$Co at early times, and $^{56}$Fe from ~60 days after explosion. We examine evolution [Co III] 5892 A emission complex during nebular phase for SNe with multiple spectra show that line flux follows square mass as a function time. This result indicates both efficient local energy deposition positrons produced in decay, long-term stability ionization state nebula. compile 77 25 SN literature...
Insulin triggers an extensive signaling cascade to coordinate adipocyte glucose metabolism. It is considered that the major role of insulin provide anabolic substrates by activating GLUT4-dependent uptake. However, stimulates phosphorylation many metabolic proteins. To examine implications this on metabolism, we performed dynamic tracer metabolomics in cultured adipocytes treated with insulin. Temporal analysis metabolite concentrations and labeling revealed rapid distinct changes favoring...
ABSTRACT We present a description of the Australian Dark Energy Survey (OzDES) and summarize results from its 6 years operations. Using 2dF fibre positioner AAOmega spectrograph on 3.9-m Anglo-Australian Telescope, OzDES has monitored 771 active galactic nuclei, classified hundreds supernovae, obtained redshifts for thousands galaxies that hosted transient within 10 deep fields Survey. also second data release, containing almost 30 000 sources, some as faint rAB = 24 mag, 375 individual...
Traditional approaches to develop 3D geological models employ a mix of quantitative and qualitative scientific techniques, which do not fully provide quantification uncertainty in the constructed fail optimally weight field observations against constraints from geophysical data. Here, using Bayesian Obsidian software package, we methodology fuse lithostratigraphic with aeromagnetic gravity data build model small (13.5 km × 13.5 km) region Gascoyne Province, Western Australia. Our...
Abstract. Unlike some other well-known challenges such as facial recognition, where machine learning and inversion algorithms are widely developed, the geosciences suffer from a lack of large, labelled data sets that can be used to validate or train robust schemes. Publicly available 3D geological models far too restricted in both number range scenarios serve these purposes. With reference inverting geophysical this problem is further exacerbated most cases real observations result unknown...
Isolated black holes (BHs) and neutron stars (NSs) are largely undetectable across the electromagnetic spectrum. For this reason, our only real prospect of observing these isolated compact remnants is via microlensing; a feat recently performed for first time. However, characterisation microlensing events caused by BHs NSs still in its infancy. In work, we perform N-body simulations to explore frequency physical characteristics entire sky. Our find that every year can expect $88_{-6}^{+6}$...
The blazar 3C 454.3 was revealed by the Fermi Gamma-ray Space Telescope to be in an exceptionally high flux state July 2008. Accordingly, we performed a multi-wavelength monitoring campaign on this using IR and optical observations from SMARTS telescopes, optical, UV X-ray data Swift satellite, public-release gamma-ray Fermi. We find excellent correlation between IR, light curves, with time lag of less than one day. amplitude infrared variability is comparable that gamma-rays, larger at or...