SEARCH FOR THE OPTICAL COUNTERPART TO SGR 0418+5729

被引：11
作者：
Durant, Martin [1 ]
Kargaltsev, Oleg [1 ]
Pavlov, George G. [2 ,3 ]
机构：
[1] Univ Florida, Dept Astron, Gainesville, FL 32611 USA
[2] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA
[3] St Petersburg Polytech Univ, St Petersburg 195257, Russia
来源：
ASTROPHYSICAL JOURNAL | 2011年 / 742卷 / 02期
关键词：
stars: neutron; X-rays: individual (SGR 0418+5729); X-RAY PULSAR; SOFT GAMMA REPEATER; YOUNG NEUTRON-STAR; 1E; 1048.1-5937; VARIABILITY; PULSATIONS; PHOTOMETRY; 4U0142+61; BURSTS;
D O I：
10.1088/0004-637X/742/2/77
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We report broadband Hubble Space Telescope imaging of the field of soft gamma-ray repeater SGR 0418+5729 with Advanced Camera for Surveys/Wide Field Channel and Wide Field Camera 3/IR. Observing in two wide filters, F606W and F110W, we find no counterpart within the positional error circle derived from Chandra observations, to limiting magnitudes m(F606W) > 28.6 and m(F110W) > 27.4 (Vega system), equivalent to reddening-corrected luminosity limits L(F606W) < 5x10(28) and L(F110W) < 6x10(28) erg s(-1) for a distance d = 2 kpc, at 3 sigma confidence. This, in turn, imposes lower limits on the contemporaneous X-ray/optical flux ratio of similar or equal to 1100 and the X-ray/near-infrared flux ratio of similar or equal to 1000. We derive an upper limit on the temperature and/or size of any fall-back disk around the magnetar. We also compare the detection limits with observations of other magnetars.
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页数：4
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