UGC10014 Scan 867

Contents

Observing log information

  Object:           UGC10014
  On scan num:      867
  Off scan num:     868
  R.A.:             15.762616 hrs
  Dec.:             12.495088 deg
  On azimuth:       125.731806 deg
  On zenith dist.:  37.255774 deg
  Off azimuth:      125.662486 deg
  Off zenith dist.: 37.291442 deg
  MJD:              52244
  UTC:              0.596863
  Center freq.:     1415.131646 MHz
  Doppler:          0.00002884
  Num. correlators: 2
  Spectrom. atten.: 33 39 dB
  Bandwidth:         5.0 MHz
  Num. channels:    1024
  Eff. integration: 300 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:      0.227 Jy
  Lower 20% velocity: 1057.4 km/s
  Upper 20% velocity: 1186.0 km/s
   Systemic velocity: 1121.7 km/s
   Line width (20%):   128.6 km/s
  Profile integral:   23.24 Jy * km/s
                 A:   17.68
                 B:   22.86
         Ratio B/A:   1.293
  Flux integral
     velocity range:  1040.9 - 1197.6 km/s

Comments