Number of photometry measurements by filter
Histogram of select bands
Cumulative histogram, normalized to total number of GSC241 sources
Astrometry comparison 2MASS
A comparison of GSC2 coordinates against 2MASS.
Not only does GSC241 alleviate the systematic hemisphere error (see, eg, Lasker et al. 2008), it also improves uncertainties by about a factor of 2.
These RA/Dec difference plots and statistics are from the averages of the differences for each level 10 HTM trixels (~0.015 square degrees).
In the scatter plots of ra/dec differences vs ra/dec/glon/glat, the orange line is the average across 5-degree cuts along the abscissa.
GSC23 | GSC241 |
---|---|
RA difference: Dec difference: 0.056 +/- 0.131 | RA difference: Dec difference: -0.057 +/- 0.076 |
Comparisons in Equatorial coordinates | |
RA difference | |
Dec difference | |
Comparisons in Galactic coordinates | |
RA difference | |
Dec difference | |