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teuben committed Nov 24, 2023
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.TH PVTRACE 1NEMO "9 June 2009"
.SH NAME

.SH "NAME"
pvtrace \- PV diagram envelope tracing
.SH SYNOPSIS

.SH "SYNOPSIS"
\fBpvtrace\fP in=image [parameter=value]
.SH DESCRIPTION

.SH "DESCRIPTION"
\fBpvtrace\fP tries to recover the rotation curve from a single
position-velocity (PV) diagram, by tracing the outer edges of
the signal that, after correction for a velocity dispersion
Expand Down Expand Up @@ -45,7 +48,8 @@ the ISM, instrumental resolution and beam smearing.
.PP
WAMET = WArped Modified Envelope-Tracing method

.SH PARAMETERS
.SH "PARAMETERS"
.so man1/parameters
.TP 20
\fBin=\fP
Input image file - must be an PV \fIimage(5NEMO)\fP with position
Expand Down Expand Up @@ -105,7 +109,8 @@ Output file in case input file was a cube and output is now a map, not a table.
\fBmode=\fP
Which of the output modes (see OUTPUT below) will be used for the output map.
[Default: 2]
.SH OUTPUT

.SH "OUTPUT"
Output of the program will be an ASCII table, with various derived velocities
as function of position along the P axis in the PV-diagram. The following
columns are returned (see also \fBmode=\fP above):
Expand All @@ -121,13 +126,15 @@ columns are returned (see also \fBmode=\fP above):
7 half gaussian fit
8 half gaussian fit, with for MET correction
.fi
.SH CAVEATS

.SH "CAVEATS"
Position axis must be carefully created such that the galaxy center is at P=0,
whereas for velocity it can be corrected with VSYS=. This is easy for theoretical
data, but cumbersome for real data.
.PP
The MET mode is still not very robust, clipping helps.
.SH SEE ALSO

.SH "SEE ALSO"
rotcur(1NEMO), runvelfitss07(1NEMO), ccdvel(1NEMO), snapgrid(1NEMO), ccdmom(1NEMO), ccdsub(1NEMO)
.PP
.nf
Expand All @@ -137,15 +144,19 @@ Sofue et al 1997 PASJ 49, 17
Sofue et al 523, 136
Sofue et al (1997AJ....114.2428S)
Gentile et al. (2004MNRAS.351..903G) - MET/WAMET method
Aso & Sai - Spectral Line Analysis/Modeling (SLAM) - https://arxiv.org/abs/2311.07988
.fi
.SH FILES

.SH "FILES"
.nf
.ta +2i
src/image/rotcur sources
.fi
.SH AUTHOR

.SH "AUTHOR"
Peter Teuben
.SH UPDATE HISTORY

.SH "HISTORY"
.nf
.ta +1.0i +4.0i
5-May-01 V1.0 Created PJT
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