DDO_199 Scan 113


Observing log information

  Object:           DDO_199
  On scan num:      113
  Off scan num:     114
  R.A.:             15.147000 hrs
  Dec.:             67.110667 deg
  On azimuth:       331.968571 deg
  On zenith dist.:  55.776326 deg
  Off azimuth:      331.959059 deg
  Off zenith dist.: 55.753255 deg
  MJD:              52422
  UTC:              0.424676
  Center freq.:     1419.418654 MHz
  Doppler:          -0.00002831
  Num. correlators: 2
  Spectrom. atten.: 36 40 dB
  Bandwidth:         5.0 MHz
  Num. channels:    1024
  Eff. integration: 240 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

Edited spectrum

This spectrum is the same as Figure 1 but with 1 60-second sub-integrations manually deleted because of interference or a bad baseline.

Figure 2. Edited spectrum