2D spectra of the “low-z”, low-redshift galaxies obtained with SDSS mask. The spectra are aligned in wavelength. The top panel shows SDSS28 with the highest K_AB band mag of 17.65. These sources spanned K_AB band magnitudes from 17.65 (SDSS28), 19.39 (SDSS12) to 20.46. In the center of the stripes (~19 000 Å), the decrease in flux indicates the wavelength region of strong atmospheric absorption. We can also see regions of high Poisson noise due to sky emission lines.