EMSAO Image Header Entries

EMSAO saves its results in the IRAF spectrum file header if the save_vel parameter is yes. For IRAF multispec files, there is one velocity entry per spectrum for each type of velocity and one entry per emission line found in the spectrum.

VELOCITY=            11212.030
CZERR   =               15.630

The final radial velocity for the first spectrum in km/sec and its error, also in km/sec. If either XCSAO or EMSAO has been run, this is the same velocity with a more realistic error. If both have been run, this velocity is either an error-weighted combination, if both gave good results, or the same as the best velocity.

CZEM    =            11214.092
CZEERR  =                5.629
CZEMNL  =                    9
CZEMNLF =                    9

The weighted average of the velocities from the redshifts of the accepted lines, its error, the number of emission lines found, and the number of emission lines which were acceptably fit.

EMLINE1 = 'Hb 4861.33 5043.39 163.47 2.2380 11227.52 6.11 6.28 0.075'
EMLINE2 = 'OIII 4958.91 5142.12 77.282 5.0558 11076.10 7.41 5.78 0.051'
EMLINE3 = 'OIII 5006.84 5193.76 294.21 2.6857 11192.23 5.83 11.03 0.083'
EMLINE4 = 'OI 6300.23 6538.32 85.944 6.6561 11329.51 5.81 7.06 0.083'
EMLINE5 = 'N1 6548.06 6794.22 114.41 0.6230 11270.15 4.50 0.92 0.139'
EMLINE6 = 'Ha 6562.82 6808.68 823.11 1.8690 11230.78 4.41 20.04 0.144'
EMLINE7 = 'N2 6583.57 6830.45 220.81 1.2460 11242.18 4.57 3.61 0.135'
EMLINE8 = 'S1 6717.00 6967.96 328.20 2.2308 11200.87 4.33 9.49 0.150'
EMLINE9 = 'S2 6731.30 6982.57 174.80 3.3782 11190.64 4.48 7.60 0.140'

For each line in the spectrum, the name, rest and observed wavelengths in angstroms, height and width of line, velocity (cz) and error (from center error in Gaussian fit) in km/sec, equivalent width, and a weighting factor which indicates what fraction the line contributed to the final emission velocity. If the weight is negative, the line was manually dropped from the fit; if the weight is zero, the line shape as determined by the fit did not meet EMSAO's standards.

HISTORY   CZEM by rvsao.emsao 1.5beta Mon 17:55:06 22-Aug-94

The EMSAO history gives the RVSAO version, the time, and the date.

EMSAO Image Header Entries

Last updated 23 August 1994