These plots are for all scans that have processed coadds that have magnitude thresholds for unconfused areas, which are 15.50, 14.75 and 14.25 mag for J, H and K, respectively. There are 1,484 scans. Note that the K histogram is quite different from the other bands due to the significant seasonal variation, and hence its histogram will change as we process more data from different time periods.
The percentile points are 1, 5, 10, 25, 50, 75, 90, 95 and 99%.
| |
|
| Histogram of Minimum Scan Noises | ||||||
|---|---|---|---|---|---|---|
| Percentile Rank | J | H | K | |||
| coadd noise | bkgnd_sigma | coadd noise | bkgnd_sigma | coadd noise | bkgnd_sigma | |
| 0.01 | 0.42 | 0.42 | 0.71 | 0.69 | 0.77 | 0.76 |
| 0.05 | 0.45 | 0.44 | 0.79 | 0.77 | 0.81 | 0.80 |
| 0.10 | 0.46 | 0.46 | 0.83 | 0.81 | 0.84 | 0.83 |
| 0.25 | 0.49 | 0.48 | 0.88 | 0.86 | 0.93 | 0.91 |
| 0.50 | 0.51 | 0.50 | 0.96 | 0.93 | 1.10 | 1.09 |
| 0.75 | 0.54 | 0.53 | 1.07 | 1.02 | 1.20 | 1.19 |
| 0.90 | 0.58 | 0.57 | 1.19 | 1.12 | 1.25 | 1.24 |
| 0.95 | 0.62 | 0.60 | 1.29 | 1.16 | 1.28 | 1.26 |
| 0.99 | 0.71 | 0.69 | 1.69 | 1.40 | 1.35 | 1.32 |
http://spider.ipac.caltech.edu/staff/tchester/2mass/analysis/galaxies/backgrounds/low_density/percent_plots.html
Comments and feedback: Tom Chester
Last update: 15 October 1998.