The plotting of an NSVS light curve from the Internet is similar to the plotting of an ASAS-3 or ZTF light curve, both of which are explained in detail in this User Guide.  

The Plot light curve from NSVS dialog box consists of two sections: the upper one is labeled Star name, and allows to enter the NSVS name of the star to be plotted (e.g., NSVS 7984734), or the AAVSO VSX name, or the SIMBAD name, or its (J2000.0) RA and Decl coordinates. Both values have to be separated with a semi-colon. RA and Decl need to be in sexagesimal format with values separated by spaces. So, a valid entry would be: 04 59 13.57; -69 35 43.3. Or its (J2000.0) RA and Decl coordinates, expressed in degrees and separated with a semi-colon. Example: 76.80654; -69.595361.

The fields in the Additional fields section are identical to the ones found in the ASAS-3 and ZTF descriptions, except for the addition of a Quality flag selector. This selector allows to reject observations during import, that do not meet certain photometric quality criteria (e.g., saturated observations, unreliable measurements, etc):

    • Default: these are the default Quality Flags set on the NSVS website. Use this selection to avoid importing observations that do not meet the default NSVS quality criteria.

    • Otero: this is a modified set of Quality Flags, which were advised by Sebastian Otero (AAVSO) in 2012 (Ivan Adamin, private communication). It consists of following fields: SATURATED, APINCOMPL, NOCORR, HISCAT and RADECFLIP. We recommend to use the Otero flags in Peranso.

If multiple objects match the search criteria, Peranso will ask you to select one, from the list of (unique) NSVS names of each matching object.