NGC6946 Scan 685


Observing log information

  Object:           NGC6946
  On scan num:      685 687 689
  Off scan num:     686 688 690
  R.A.:             20.581194 hrs
  Dec.:             60.154002 deg
  On azimuth:       324.771906 deg
  On zenith dist.:  59.240825 deg
  Off azimuth:      324.757664 deg
  Off zenith dist.: 59.214099 deg
  MJD:              52503
  UTC:              0.435139
  Center freq.:     1420.201179 MHz
  Doppler:          0.00001603
  Num. correlators: 2
  Spectrom. atten.: 35 42 dB
  Bandwidth:        10.0 MHz
  Num. channels:    1024
  Eff. integration: 900 seconds

Raw spectrum

This spectrum is the integration of all data for the scan with spectra from both polarizations added together. The spectral intensities are Ssys * (on - off) / off, where Ssys is the system temperature in Jy. The system noise flux density equivalent is calibrated for each scan with a calibration noise source firing during each scan. The cal value, in Jy, is calibrated by comparison with a number of continuum sources as described in the summary web page

Figure 1. Unedited spectrum