LVM875. Scan 691


Observing log information

  Object:           LVM875.
  On scan num:      691 693 695 697 699 701
  Off scan num:     692 694 696 698 700 702
  R.A.:             20.253492 hrs
  Dec.:             79.252877 deg
  On azimuth:       347.530656 deg
  On zenith dist.:  55.362648 deg
  Off azimuth:      347.523454 deg
  Off zenith dist.: 55.349650 deg
  MJD:              52503
  UTC:              0.457951
  Center freq.:     1397.690670 MHz
  Doppler:          0.00002562
  Num. correlators: 2
  Spectrom. atten.: 35 42 dB
  Bandwidth:        10.0 MHz
  Num. channels:    1024
  Eff. integration: 1740 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 2 60-second sub-integrations manually deleted because of interference or a bad baseline.

Figure 2. Edited spectrum