A5100724619- Gamma-ray bursts and supernovae
- Stellar, planetary, and galactic studies
- Astrophysics and Cosmic Phenomena
- Astronomy and Astrophysical Research
- Astrophysical Phenomena and Observations
- Soil Moisture and Remote Sensing
- Astro and Planetary Science
- Electromagnetic Scattering and Analysis
- Electromagnetic Simulation and Numerical Methods
- Planetary Science and Exploration
- Climate change and permafrost
- Astrophysics and Star Formation Studies
- Cryospheric studies and observations
- Pulsars and Gravitational Waves Research
- Astronomical Observations and Instrumentation
- Galaxies: Formation, Evolution, Phenomena
- Calibration and Measurement Techniques
- Environmental Impact and Sustainability
- Bariatric Surgery and Outcomes
- Photocathodes and Microchannel Plates
- Methane Hydrates and Related Phenomena
- Peer-to-Peer Network Technologies
- Radio Astronomy Observations and Technology
- Infrared Target Detection Methodologies
- Water Quality Monitoring Technologies
University of Chinese Academy of Sciences
2025
Chinese Academy of Sciences
2013-2024
Hefei Institutes of Physical Science
2024
National Astronomical Observatories
2011-2023
Heilongjiang Institute of Technology
2023
Harbin Institute of Technology
2023
Zhejiang Province Institute of Architectural Design and Research
2021
Wuhan University
2020
The University of Western Australia
2019
Chongqing University
2019
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...
A multi-module staggered (MMS) long-linear-array (LLA) detector is presently recognized as an effective and widely adopted means of improving the field view (FOV) in-orbit optical line-array cameras. In particular, in terms low-orbit whisk-broom payloads, MMS LLA combined with one-dimensional scanning mirror capable achieving both large-swath high-resolution imaging. However, because complexity instantaneous relative motion model (IRMM) imaging mechanism, it really difficult to determine...
Abstract Rapid identification of candidates high-value gamma-ray bursts (GRBs), including both high- z and local events, is crucial for outlining subsequent observational strategy. In this paper, we present a model that enables an on-duty astronomer to rapidly identify GRBs prior spectroscopy, provided these events have been localized at arcsecond's precision. After taking into account the mass distribution host galaxies GRBs, calculates two-dimensional cross-match probabilities between GRB...
Abstract The Murchison Widefield Array (MWA) is an open access telescope dedicated to studying the low-frequency (80–300 MHz) southern sky. Since beginning operations in mid-2013, MWA has opened a new observational window hemisphere enabling many science areas. driving objectives of original design were observe 21 cm radiation from Epoch Reionisation (EoR), explore radio time domain, perform Galactic and extragalactic surveys, monitor solar, heliospheric, ionospheric phenomena. All together...
Dimethyl sulfide (DMS) emitted from the petrochemical industry is a typical volatile organic sulfur compound (VOSC) with poor solubility and odorous smell. A microbial fuel cell (MFC) regarded as an appreciative method for simultaneous DMS degradation electricity generation. In this work, first time, we developed MFC system treatment. With initial concentration of 95 mg L–1, removal efficiency at closed-circuit state was achieved high 89.5% within 40 h, which 1.21 times higher than that...
We present a novel class of models for Type Ia supernova time-evolving spectral energy distributions (SEDs) and absolute magnitudes: they are each modeled as stochastic functions described by Gaussian processes. The values the SED magnitudes defined through well-defined regression prescriptions, so that data directly inform models. As proof concept, we implement model synthetic photometry built from spectrophotometric time series Nearby Supernova Factory. Absolute at peak B brightness...
We present Keck LRIS spectroscopy and $g$-band photometry of the metal-poor, low-luminosity host galaxy super-Chandrasekhar mass Type Ia supernova SN 2007if. Deep imaging reveals its apparent magnitude to be $m_g=23.15\pm0.06$, which at spectroscopically-measured redshift $z_{helio}=0.07450\pm0.00015$ corresponds an absolute $M_g=-14.45\pm0.06$. Galaxy $g-r$ color constrains mass-to-light ratio, giving a stellar estimate $\log(M_*/M_\odot)=7.32\pm0.17$. Balmer absorption in continuum, along...
We present a fast method for deriving general explicit closed-form expression of second-order perturbative solutions the problem radiation and propagation electromagnetic (EM) fields in hybrid layered structure with an arbitrary number rough interfaces planar stratified medium based on classical small perturbation (SPM). The SPM electric magnetic each region rough-layered is provided by theoretical analysis fully formula derivation instead considering any other approximation equivalent...
We describe the photometric calibration of Lunar-based Ultraviolet Telescope (LUT), first robotic astronomical telescope working on lunar surface, for its six months operation surface. Two spectral datasets (set A and B) from near-ultraviolet (NUV) to optical band were constructed with 44 International Explorer (IUE) standards, because LUT's relatively wide wavelength coverage. Set was obtained by extrapolating IUE NUV spectra (λ < 3200 Å) based upon theoretical stellar atmosphere models. B...
We describe the data processing pipeline developed to reduce pointing observation of Lunar-based Ultraviolet Telescope (LUT), which belongs Chang'e-3 mission Chinese Lunar Exploration Program. The program LUT is dedicated monitor variable objects in a near-ultraviolet (245-345 nm) band. works lunar daytime for sufficient power supply, so some special strategies have been pipeline. procedures include stray light removing, astrometry, flat fielding employing superflat technique, source...
As water environment is an important part of mangrove ecosystem, efficient prediction quality the foundation for judging health wetland ecosystem. And it also contributes a lot to smooth development environmental protection work. Based on data and weather in Beilun Estuary, this paper chooses permanganate index content ammonia nitrogen, which can reflect quality, as forecasting targets. We propose multi-feature method called SARIMA-LSTM basis seasonal autoregressive integrated moving average...
It is essential to study the allocation of carbon emission quotas key high-carbon industries. Here, we used theoretical generation performance standard (GPS) evaluate inputs and outputs five major Chinese power groups. We predicted their 2017, 2020, 2030 performances using a grey prediction model based on 2011–2016 data, then applied GPS calculate target year distributions emissions, finally employing data envelopment analysis (DEA) effectiveness these allocations. The trading evaluations...
Abstract Stellar white-light flares are believed to play an essential role in the physical and chemical properties of atmosphere surrounding exoplanets. Here we report optical monitoring campaign on nearby flaring system EI Cnc carried out by Ground-based Wide Angle Camera (GWAC) its dedicated follow-up telescope. A superflare, coming from brighter component CncA, was detected observed, which four components required properly model complex decay light curve. The lower limit flare energy R −...
We estimate systematic errors due to K-corrections in standard photometric analyses of high-redshift Type Ia supernovae. Errors K-correction occur when the spectral template model underlying light curve fitter poorly represents actual supernova energy distribution, meaning that distance modulus cannot be recovered accurately. In order quantify this effect, synthetic photometry is performed on artificially redshifted spectrophotometric data from 119 low-redshift supernovae Nearby Supernova...
Early afterglow observations of gamma-ray bursts (GRBs) are valuable for exploring the properties their jets and ambient medium. We report our photometric spectroscopic GRB 210104A discuss its jet with multiwavelength data. Our observation reveals several absorption features a tentative redshift 0.46 is identified. A bright optical flare that has peak brightness $R=13$ mag at $112\pm 7$~s was observed in $R$ band during $67\sim 165$ seconds post trigger. The flux $R$-band decays slope...
We develop a fast method for deriving the general closed-form perturbative solutions of bistatic scattering from layered structure with multilayer rough interfaces based on small perturbation (SPM). The proposed is developed by theoretical analysis and fully formula derivation instead considering any other approximation equivalent process. In addition, our completeness SPM can give solution problem radiation propagation electromagnetic fields in hybrid an arbitrary number planar stratified...
In the archive of Ground Wide Angle Camera (GWAC), we found 43 white light flares from stars, among which, three are sympathetic or homologous flares, and one them also has a quasi-periodic pulsation with period $13.0\pm1.5$ minutes. Among these flare there 19 new active stars 41 that have available TESS and/or K2 curves, which 931 stellar flares. We obtained rotational orbital periods 34 GWAC 33 less than 5.4 days, ephemerides eclipsing binaries curves. Combining low resolution spectra...
The energy injection model is usually proposed to interpret the shallow-decay phase in Swift GRB X-ray afterglows. However, very few GRBs have simultaneous signatures of their optical and Here, we report observations 090529A from 2000 sec $\sim10^6$ after burst, which an achromatic decay seen at both wavelengths. light curve shows a 0.37 0.99 with break $\sim10^5$ sec. In same time interval, indices changed 0.04 1.2. Comparing these values closure relations, segment 3$\times10^{4}$...
We present unfiltered CCD photometry of a sample 71 candidate RR Lyrae stars during 2003 and 2004, out 148 that were selected from Sloan Digital Sky Survey (SDSS) commissioning data by Ivezić coworkers. obtain light curves 69 catalog their positions, amplitudes, periods, types, mean magnitudes. confirm the are true variables based on periods curves, for first time 41 them. identify 57 type ab, 11 c, 1 d (double-mode) in our sample. The double-mode star shows properties similar to globular...
We present a star catalog extracted from the Lunar-based Ultraviolet Telescope (LUT) survey program. LUT's observable sky area is circular belt around Moon's north pole, and program covers preferred of about 2400 deg2 which includes region Galactic plane. The data are processed with an automatic pipeline copes stray light contamination, artificial sources, cosmic rays, flat field calibration, photometry so on. In first release version, provides high confidence sources have been...
In the era of multi-messenger astronomy, gamma-ray bursts (GRBs) with known redshifts, especially high-redshift GRBs, are a powerful tool for studying structure and evolution early Universe. We review background, history, application measurement methods GRB redshifts in astronomy. Based on different observation targets, two mainly introduced. One is afterglow, other host galaxy. There various processing belonging to based including spectral method afterglow energy distribution fitting...