Object: UGC260* On scan num: 580 Off scan num: 581 R.A.: 0.450821 hrs Dec.: 11.584303 deg On azimuth: 235.568881 deg On zenith dist.: 39.180646 deg Off azimuth: 235.500445 deg Off zenith dist.: 39.142735 deg MJD: 52242 UTC: 0.139271 Center freq.: 1410.262113 MHz Doppler: -0.00008393 Num. correlators: 2 Spectrom. atten.: 30 38 dB Bandwidth: 5.0 MHz Num. channels: 1024 Eff. integration: 300 seconds
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
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. Narrow band interference was removed from 3 channels by interpolation between the nearest valid channels
Peak intensity: 0.170 Jy
Lower 20% velocity: 1995.4 km/s
Upper 20% velocity: 2272.0 km/s
Systemic velocity: 2133.7 km/s
Line width (20%): 276.6 km/s
Profile integral: 34.22 Jy * km/s
A: 27.33
B: 34.50
Ratio B/A: 1.262
Flux integral
velocity range: 1970.3 - 2293.3 km/s
slight RFI on low velocity wing