SL1703+6127 Scan 550


Observing log information

  Object:           SL1703+6127
  On scan num:      550 552 554 556 558 560
  Off scan num:     551 553 555 557 559 561
  R.A.:             17.054166 hrs
  Dec.:             61.451385 deg
  On azimuth:       326.339828 deg
  On zenith dist.:  59.116796 deg
  Off azimuth:      325.982787 deg
  Off zenith dist.: 58.435240 deg
  MJD:              52242
  UTC:              0.006470
  Center freq.:     1392.969701 MHz
  Doppler:          0.00000737
  Num. correlators: 2
  Spectrom. atten.: 32 38 dB
  Bandwidth:         5.0 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:      0.026 Jy
  Lower 20% velocity: 5847.2 km/s
  Upper 20% velocity: 6060.0 km/s
   Systemic velocity: 5953.6 km/s
   Line width (20%):   212.7 km/s
  Profile integral:    4.20 Jy * km/s
                 A:    3.13
                 B:    4.81
         Ratio B/A:   1.541
  Flux integral
     velocity range:  5823.4 - 6079.6 km/s


profile extent not very well defined