Photometry of the progenitor of Nova Del 2013 (V339 Del) and calibration of a deep BVRI photometric
Photometry of the progenitor of Nova Del 2013 (V339 Del) and calibration of a deep BVRI photometric
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Nova Del 2013 (V339 Del) 的祖先的光度测定和深度 BVRI 光度测定的校准
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
A. Henden
中科院分区：
文献类型：
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作者：
U. Munari;A. Henden
Asiago板块档案已经搜索了覆盖包含Nova Del 2013(V339 Del)的天空区域的旧板块。根据我们特意校准的深度BVRI光度序列来测量前体的亮度。Asiago板上祖先的平均亮度为=17.27和=17.6，平均颜色(B-V)=-0.33。记录到的B波段变化总幅度为0.9毫微克。颜色和变化性与由吸积盘发射所主导的前身相一致。2012年4月的apass全天探测也略微发现了这颗星体的祖先。我们叠加了三次个人访问的CCD图像，并在B=17.33+/-0.09和V=17.06+/-0.10MAG处测量了祖细胞。
The Asiago plate archive has been searched for old plates covering the region of the sky containing Nova Del 2013 (V339 Del). The brightness of the progenitor was measured against a deep BVRI photometric sequence that we calibrated on purpose. The mean brightness of the progenitor on Asiago plates is =17.27 and =17.6, for a mean color (B-V) = -0.33. The recorded total amplitude of variation in B band is 0.9 mag. Color and variability are in agreement with a progenitor dominated by the emission from an accretion disc. The progenitor was marginally detected also by the APASS all sky survey on April 2012. We have stacked the CCD images from three individual visits and measured the progenitor at B=17.33+/-0.09 and V=17.06+/-0.10 mag.