37 citations · 165 across the 10 of their papers we have counts for
23 papers · 1 filter
Optical Variability of the Radio Source J 1128+5925
Jianghua Wu, Xu Zhou, Jun Ma +3
Very recently, J 1128+5925 was found to show strong intraday variability at radio wavelengths and may be a new source with annual modulation of the timescale of its radio variabili…
Metal Abundance Properties of M81 Globular Cluster System
Jun Ma, David Burstein, Zhou Fan +5
This paper is the third in the series of papers on M81 globular clusters. In this paper, we present spatial and metal abundance properties of 95 M81 globular clusters, which compri…
Structural Parameters of Mayall II = G1 in M31
J. Ma, R. de Grijs, D. Chen +6
Mayall II = G1 is one of the most luminous globular clusters (GCs) known in M31. New deep, high-resolution observations with the Advanced Camera for Surveys on the {\sl Hubble Spac…
BATC 13-band Photometry of Open Cluster NGC 7789
Zhen-Yu Wu, Xu Zhou, Jun Ma +3
We present 13-band CCD intermediate-band spectrophotometry of a field centered on the open cluster NGC 7789 from 400 to nearly 1000 nm, taken with Beijing-Arizona-Taiwan-Connecticu…
Membership Determination of Open Cluster M48 Based on BATC Thirteen-Band Photometry
Zhen-Yu Wu, Xu Zhou, Jun Ma +2
Beijing-Arizona-Taiwan-Connecticut (BATC) multi-band photometric data in the field of open cluster M48 are used to determine its membership. By comparing observed spectral energy d…
Optical Monitoring of BL Lacertae Object OJ 287: a 40-Day Period?
Jianghua Wu, Xu Zhou, Xuebing Wu +6
We present the results of our optical monitoring of the BL Lacertae object OJ 287 during the first half of 2005. The source did not show large-amplitude variations during this peri…