A5058180571- Astrophysical Phenomena and Observations
- Astronomical Observations and Instrumentation
- Gamma-ray bursts and supernovae
- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Scientific Measurement and Uncertainty Evaluation
- Pulsars and Gravitational Waves Research
- Particle Accelerators and Free-Electron Lasers
- Galaxies: Formation, Evolution, Phenomena
- Historical Astronomy and Related Studies
- X-ray Spectroscopy and Fluorescence Analysis
Liupanshui Normal University
2024-2025
National Astronomical Observatories
2011
GK Persei, an old nova and intermediate polar (IP), exhibited a dwarf (DN) outburst in 2010. This was extensively observed by the Neil Gehrels Swift Observatory, beginning 1.95 days after eruption continuing until 13.9 before maximum of optical. In this paper, we present timing spectral analyses, comparing results with those other outbursts. We confirm spin modulation 2 $-$ 10 keV X-ray range period $P_{\rm WD} = 351.325(9)$ s. Additionally, detected 0.3 band during second half observations,...
Abstract In this study, we present a detailed analysis of public archival soft X-ray data on the classical nova V339 Delphini (Nova Del 2013) during its outburst, obtained using Chandra High-Resolution Camera Spectrometer (HRC-S) and Low Energy Transmission Grating (LETG), as well XMM-Newton in 2013. The observations, spanning from day 85.2 to 112.0 after optical maximum, capture luminous supersoft source (SSS) phase. spectra reveal numerous absorption features with blue-shifted velocities...
Abstract GK Persei, an old nova and intermediate polar (IP), exhibited a dwarf (DN) outburst in 2010. This was extensively observed by the Neil Gehrels Swift Observatory, beginning 1.95 days after eruption continuing until 13.9 before maximum of optical. In this paper, we present timing spectral analyses, comparing results with those other outbursts. We confirm spin modulation 2 − 10 keV X-ray range period PWD = 351.325(9) s. Additionally, detected 0.3 band during second half observations,...
PG 1351+489 is one of the 20 DBVs – pulsating helium-atmosphere white dwarf stars known and has simplest power spectrum for this class star, making it a good candidate to study cooling rates. We report accurate period determinations main peak at 489.334 48 s two other normal modes using data from Whole Earth Telescope (WET) observations 1995 2009. In 2009, we detected new pulsation mode exhibited substantial change in its amplitude compared all previous observations. were able estimate...
ABSTRACT The old nova and intermediate polar (IP) GK Persei underwent one of its recurrent dwarf (DN) outbursts in 2018. We proposed monitoring it UV X-rays with the Neil Gehrels Swift Observatory, starting less than six days after eruption, until 16 eruption ended. For first time, we could follow decay to minimum light X-rays. present timing spectral analysis, comparing results previous quiescent status. confirm spin modulation a period PWD = 351.325(9) s, only 2–10 keV range. was not...
In this study we present an analysis of the archival X-ray data eclipsing supersoft binary CAL 87 observed with Chandra Advanced CCD Imaging Spectrometer (ACIS) camera and Low Energy Transmission Grating (LETG) in 2001 August XMM-Newton 2003 April. The high-resolution spectra are almost unchanged on two different dates. average unabsorbed luminosity during exposure was 4.64 − 5.46 × 10 36 ergs s −1 4.54 4.82 2003, prominent redshifted emission lines, mostly nitrogen, oxygen, iron, argon,...
In this study, we present an analysis of the archival X-ray data eclipsing supersoft binary CAL 87 observed with {\it Chandra} Advanced CCD Imaging Spectrometer (ACIS) camera and Low Energy Transmission Grating (LETG) in 2001 August XMM-Newton} 2003 April. The high resolution spectra are almost unchanged two different dates. average unabsorbed luminosity during exposure was 4.64$-$5.46$\times10^{36}$ ergs s$^{-1}$ 4.54$-$4.82 $\times10^{36}$ 2003, prominent red-shifted emission lines, mostly...
The old nova and intermediate polar (IP) GK Persei underwent one of its recurrent dwarf (DN) outbursts in 2018. We proposed monitoring it UV X-rays with the Neil Gehrels Swift Observatory, starting less than six days after eruption, until 16 eruption ended. For first time we could follow decay to minimum light X-rays. present timing spectral analysis, comparing results previous quiescent status. confirm spin modulation a period 351.325(9) s, only 2-10 keV range. was not detected 0.3-2 range...