Differences
This shows you the differences between two versions of the page.
| Next revision | Previous revision | ||
| un:band [2024/04/16 02:09] – created asad | un:band [2024/04/16 02:28] (current) – asad | ||
|---|---|---|---|
| Line 1: | Line 1: | ||
| ====== Bands ====== | ====== Bands ====== | ||
| - | Color or frequency bands are standardized systems of filters in astronomy which are very different for different frequency ranges. In the visibile range, the bands are usually called //spectral color bands// or // | + | Color or frequency bands are standardized systems of filters in astronomy which are very different for different frequency ranges. In the visibile range, the bands are usually called //spectral color bands// or // |
| ===== - Photometric system ===== | ===== - Photometric system ===== | ||
| Line 7: | Line 7: | ||
| {{: | {{: | ||
| - | As evident from the figure, the U filter only allows ultraviolet light, the B filter blue light and V yellow-green light. In the Johnson-Cousins-Glass (JCG) system more filters are added. In the following table, we show the effective wavelength $\lambda_e$, | + | As evident from the figure, the U filter only allows ultraviolet light, the B filter blue light and V yellow-green light. In the Johnson-Cousins-Glass (JCG) system more filters are added. In the following table, we show the effective wavelength $\lambda_e$, |
| ^ Filter ^ $\lambda_e$ (nm) ^ $\Delta\lambda$ (nm) ^ $\nu_e$ (THz) ^ $\Delta\nu$ (THz) ^ $S_0$ (Jy) ^ | ^ Filter ^ $\lambda_e$ (nm) ^ $\Delta\lambda$ (nm) ^ $\nu_e$ (THz) ^ $\Delta\nu$ (THz) ^ $S_0$ (Jy) ^ | ||
| Line 20: | Line 20: | ||
| | L | 3450 | 472 | 87 | 11.9 | 281 | | | L | 3450 | 472 | 87 | 11.9 | 281 | | ||
| | M | 4750 | 460 | 63 | 6.1 | 154 | | | M | 4750 | 460 | 63 | 6.1 | 154 | | ||
| + | |||
| + | ===== - Radio bands ===== | ||
un/band.1713254950.txt.gz · Last modified: 2024/04/16 02:09 by asad