Shao Ming Hu

Multiband Optical Photometric Variability of the Blazar OJ 287 from 2015 to 2025

A. Gupta, Karan Dogra, Mark Kidger, Mauri J. Valtonen et autres

Abstract We present the most densely sampled multiband optical photometric observations of the peculiar BL Lacertae object OJ 287 from 2015 to 2025 with a focus on its optical activity on diverse timescales. We present a total of 2296, 10,927, 11,484, and …

cn, ge, in, us, gb, at, es, fi, il, ru, de, jp, rs, bg, cl, ua, it, tj, se (code pays fourni par la source)

Multi-band optical photometric variability of the blazar OJ 287 from 2015 to 2025

A. Gupta, Karan Dogra, Mark Kidger, Mauri J. Valtonen et autres

We present the most densely sampled multi-band optical photometric observations of the peculiar BL Lacertae object OJ 287 from 2015 to 2025 with a focus on its optical activity on diverse timescales. We present a total of 2296, 10927, 11484, and 2982 …

Optical multi-band observations of BL Lacertae during the outburst of 2005. (arXiv:astro-ph/0701129v1 CROSS LISTED)

Shao Ming Hu, Jianghua Wu, Gang Zhao, Xueging Zhou

The aim of our observations is to investigate the intranight variability properties and the spectral variability of BL Lacertae. 799 optical multi-band observations were intensively made with the Beijing-Arizona-Taiwan-Connecticut (BATC) 60/90cm Schmidt telescope during the outburst composed of two subsequent flares in …

cn (code pays fourni par la source)

Light Curve Properties of high earth orbital rocket bodies Observed at Weihai Observatory of Shandong University

Xu Chen, Shao Ming Hu

Symmetry Analysis of the Multi-band Optical Variability of BL LAC S5 0716+714 in Intranight and Longer Timescales

Yu Tong Li, Shao Ming Hu, Yunguo Jiang, Xu Chen et autres

The well-sampled optical light curves of S5 0716+714 in BVRI bands spanning about 20 years were built. The variability asymmetry could provide independent constraints on physical models for blazars variability. To perform analyses of variability properties, individual flares were decomposed and fitted …

cn, es (code pays fourni par la source)

variability and spectral variation of 3C 66A

Shao Ming Hu, X. Zhou, X. Zhang, Yi Zheng et autres

3C 66A was monitored by the BATC(Beijing-Arizona-Taipei-Connecticut) telescope from 2005 to 2008,1994 observations were obtained on 89 nights. Detailed research and analysis was performed on these observations in this paper. A long term burst occurred in the whole light curve. No intra-day …

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Stability of the FOCES spectrograph using an astro-frequency comb as calibrator

Anna Brucalassi, F. Grupp, H. Kellermann, Liang Wang et autres

We present the results of a series of measurements conducted using the upgraded Fiber Optic Cassegrain Echelle Spectrograph (FOCES)1 intended to be operated at the 2.0 m Fraunhofer Telescope at the Wendelstein Observatory (Germany) in combination with a laser frequency comb as …

de, cn (code pays fourni par la source)

Statistical analysis of the temporal properties of BL Lacertae

Yucheng Guo, Shao Ming Hu, Yu Tong Li, Xu Chen

A comprehensive temporal analysis has been performed on optical light curves of BL Lacertae in the B, V and R bands. The light curves were denoised by Gaussian smoothing and decomposed into individual flares using an exponential profile. The asymmetry, duration, peak …

cn (code pays fourni par la source)

The Weihai Observatory search for close-in planets orbiting giant stars

Robert A. Wittenmyer, Dong-Yang Gao, Shao Ming Hu, E. Villaver et autres

Planets are known to orbit giant stars, yet there is a shortage of planets orbiting within ∼0.5 AU (P ≲ 100 days). First-ascent giants have not expanded enough to engulf such planets, but tidal forces can bring planets to the surface of …

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Photometric study and period variation investigation of the W UMa-type binary EQ UMa

Shao Ming Hu, Kai Li, Di-Fu Guo, Yunguo Jiang et autres

Abstract Four-color light curves of EQ UMa were obtained with the 1.0 m telescope at Weihai Observatory, Shandong University. The light variability of EQ UMa is typical of a W UMa-type binary. By analyzing the four-color light curves simultaneously, we found that …

cn (code pays fourni par la source)

5-day photo-polarimetric WEBT Campaign on Blazar S5 0716+714 - a Study of Microvariabiltiy in Blazar

Gopal Bhatta, Michal Ostrwoski, Ł. Stawarz, S. Zoła et autres

Center determination for trailed sources in astronomical observation images

Jun Du, Shao Ming Hu, Chen Xu, Di Fu Guo

Images with trailed sources can be obtained when observing near-Earth objects, such as small astroids, space debris, major planets and their satellites, no matter the telescopes track on sidereal speed or the speed of target. The low centering accuracy of these trailed …

cn (code pays fourni par la source)