Visual Magnitude Estimates of the Variable Star GN Sge

This dataset contains visual magnitude estimates of the variable star GN Sge, obtained from photographic observations made with the Seven-Camera Astrograph of the Odessa Astronomical Observatory. The magnitudes were estimated visually from photographic plates. The data are provided as a time series of Julian Dates (JD) and corresponding stellar magnitudes in the photovisual magnitude system. All Julian Dates are strictly increasing and unique. The numerical precision of the original measurements is fully preserved. A colon “:” following a magnitude denotes an uncertain visual estimate, in accordance with standard variable-star observing practice. Unmarked values represent normal-confidence estimates. The dataset is intended for studies of long-term variability, historical light-curve reconstruction, and comparison with catalog and survey data. It supplements information available in major astronomical databases such as SIMBAD and the General Catalogue of Variable Stars (GCVS). Data summary:– Number of observations: 534– Julian Date range: JD 2436381.4712 – 2443069.2674– Observation type: visual estimates from photographic plates– Instrument: Seven-Camera Astrograph, Odessa Astronomical Observatory– Magnitude system: photovisual本数据集包含变星GN Sge的视星等估算值，数据源自敖德萨天文台（Odessa Astronomical Observatory）七相机天体照相仪（Seven-Camera Astrograph）的照相观测结果。所有星等均通过对照相底片的目视估算得到。 数据以儒略日（Julian Date, JD）时序序列与对应照相目视星等系统下的恒星星等形式提供。所有儒略日均严格递增且互不重复，原始测量的数值精度得到完整保留。 依据变星观测的标准惯例，星等后附带的半角冒号“:”代表该目视估算结果存在不确定性；未标注冒号的数值则代表置信度正常的估算结果。 本数据集可应用于长期变异性研究、历史光曲线重建，以及与各类星表和巡天数据的对比分析，可补充SIMBAD与变星总表（General Catalogue of Variable Stars, GCVS）等主流天文数据库中的现有资料。 数据概况： - 观测总数：534条 - 儒略日范围：JD 2436381.4712 — 2443069.2674 - 观测类型：照相底片目视估算 - 观测仪器：敖德萨天文台七相机天体照相仪 - 星等系统：照相目视星等