N0710 Scan 616


Observing log information

  Object:           N0710
  On scan num:      616 618 620 622 624 626
  Off scan num:     617 619 621 623 625 627
  R.A.:             1.881783 hrs
  Dec.:             36.054897 deg
  On azimuth:       82.664119 deg
  On zenith dist.:  29.797637 deg
  Off azimuth:      82.643687 deg
  Off zenith dist.: 29.833564 deg
  MJD:              52498
  UTC:              0.303403
  Center freq.:     1392.209709 MHz
  Doppler:          0.00008949
  Num. correlators: 2
  Spectrom. atten.: 39 37 dB
  Bandwidth:        10.0 MHz
  Num. channels:    1024
  Eff. integration: 1800 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

Measured spectrum

This is the section of spectrum measured to obtain the parameters listed below. The three horizontal dotted lines are the baseline, the peak level selected, and 20% of the peak level. The two vertical dotted lines mark the selected 20% line width edges. The solid horizontal line marks the velocity range chosen for the the line profile flux density integral. This spectrum has a second-order least squares fit baseline removed using most of the baseline shown in Figure 1.

Figure 2. Measured spectrum

Measured parameters

  Peak intensity:      0.011 Jy
  Lower 20% velocity: 5983.2 km/s
  Upper 20% velocity: 6218.0 km/s
   Systemic velocity: 6100.6 km/s
   Line width (20%):   234.8 km/s
  Profile integral:    2.22 Jy * km/s
                 A:    1.95
                 B:    2.29
         Ratio B/A:   1.173
  Flux integral
     velocity range:  5969.8 - 6231.5 km/s