1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
|
include <smw.h>
include <units.h>
include "identify.h"
# ID_VELOCITY -- Compute velocity.
procedure id_velocity (id, interactive)
pointer id # ID pointer
int interactive # Called interactively?
int i, n
double z, sumz, sumz2, sumw, zerr, zhelio, v, verr, id_zval()
begin
sumz = 0
sumw = 0
n = 0
for (i=1; i <= ID_NFEATURES(id); i = i + 1) {
if (IS_INDEFD (USER(id,i)) || WTS(id,i) == 0.)
next
z = id_zval (id, FIT(id,i), USER(id,i))
sumz = sumz + WTS(id,i) * z
sumw = sumw + WTS(id,i)
n = n + 1
}
if (sumw > 0.) {
zhelio = ID_ZHELIO(id)
sumz = sumz / sumw
sumz2 = 0.
for (i=1; i <= ID_NFEATURES(id); i = i + 1) {
if (IS_INDEFD (USER(id,i)) || WTS(id,i) == 0.)
next
z = id_zval (id, FIT(id,i), USER(id,i))
sumz2 = sumz2 + WTS(id,i) * (z - sumz) ** 2
}
if (sumz2 > 0.)
sumz2 = sqrt (sumz2 / sumw)
else
sumz2 = 0.
zerr = sumz2
if (n > 1)
zerr = zerr / sqrt (n - 1.)
if (interactive == YES) {
v = (sumz + zhelio) * VLIGHT
verr = zerr * VLIGHT
if (zhelio == 0D0)
call printf (
"%s%s: Lines=%3d, Vobs=%.5g (%.5g), Zobs=%.5g (%.5g)\n")
else
call printf (
"%s%s: Lines=%3d, Vhelio=%.5g (%.5g), Zhelio=%.5g (%.5g)\n")
call pargstr (Memc[ID_IMAGE(id)])
call pargstr (Memc[ID_SECTION(id)])
call pargi (n)
call pargd (v)
call pargd (verr)
call pargd (sumz + zhelio)
call pargd (zerr)
}
ID_REDSHIFT(id) = sumz
ID_RMSRED(id) = sumz2
ID_ZHELIO(id) = zhelio
}
end
# ID_ZVAL -- Compute Z value.
double procedure id_zval (id, x, xref)
pointer id #I Identify pointer
double x #I Coordinate
double xref #I Reference coordinate
double z #O Z value
double y, yref
pointer un
begin
y = x
yref = xref
un = UN(ID_SH(id))
if (UN_LOG(un) == YES) {
y = 10D0 ** y
yref = 10D0 ** yref
}
if (UN_INV(un) == YES) {
y = 1D0 / y
yref = 1D0 / yref
}
switch (UN_CLASS(un)) {
case UN_WAVE:
z = (y - yref) / yref
case UN_FREQ, UN_ENERGY:
z = (yref - y) / y
case UN_VEL:
y = sqrt ((1 + y) / (1 - y))
yref = sqrt ((1 + yref) / (1 - yref))
z = (y - yref) / yref
case UN_DOP:
y = y + 1
yref = yref + 1
z = (y - yref) / yref
}
return (z)
end
# ID_ZSHIFTD -- Shift coordinate by redshift.
double procedure id_zshiftd (id, x, dir)
pointer id #I Identify pointer
double x #I Coordinate
int dir #I Direction (0=to rest, 1=from rest)
double y #O Shifted coordinate
pointer un
begin
y = x
un = UN(ID_SH(id))
if (UN_LOG(un) == YES)
y = 10D0 ** y
if (UN_INV(un) == YES)
y = 1D0 / y
switch (UN_CLASS(un)) {
case UN_WAVE:
if (dir == 0)
y = y / (1 + ID_REDSHIFT(id))
else
y = y * (1 + ID_REDSHIFT(id))
case UN_FREQ, UN_ENERGY:
if (dir == 0)
y = y * (1 + ID_REDSHIFT(id))
else
y = y / (1 + ID_REDSHIFT(id))
case UN_VEL:
y = sqrt ((1 + y) / (1 - y))
if (dir == 0)
y = y / (1 + ID_REDSHIFT(id))
else
y = y * (1 + ID_REDSHIFT(id))
y = y ** 2
y = (y - 1) / (y + 1)
case UN_DOP:
y = (y + 1)
if (dir == 0)
y = (y + 1) / (1 + ID_REDSHIFT(id)) - 1
else
y = (y + 1) * (1 + ID_REDSHIFT(id)) - 1
}
if (UN_INV(un) == YES)
y = 1D0 / y
if (UN_LOG(un) == YES)
y = log10 (y)
return (y)
end
# ID_ZSHIFTR -- Shift coordinate by redshift.
real procedure id_zshiftr (id, x, dir)
pointer id #I Identify pointer
real x #I Coordinate
int dir #I Direction (0=to rest, 1=from rest)
double id_zshiftd()
begin
return (real (id_zshiftd (id, double(x), dir)))
end
|
