N04848 Scan 631


Observing log information

  Object:           N04848
  On scan num:      631 633 635 637
  Off scan num:     632 634 636 638
  R.A.:             12.968260 hrs
  Dec.:             28.244933 deg
  On azimuth:       208.855255 deg
  On zenith dist.:  11.425413 deg
  Off azimuth:      208.972164 deg
  Off zenith dist.: 11.436408 deg
  MJD:              52280
  UTC:              0.483738
  Center freq.:     1386.995478 MHz
  Doppler:          0.00008310
  Num. correlators: 2
  Spectrom. atten.: 34 40 dB
  Bandwidth:        10.0 MHz
  Num. channels:    1024
  Eff. integration: 1200 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 11 60-second sub-integrations manually deleted because of interference or a bad baseline.

Figure 2. Edited spectrum