CCD Observing Log of Ritter Observatory
Page  1 of  1

Echelle settings UT Date:  4 Feb 2005
Observer:  ENH/NDM LDS Settings
X-Disp Tilt 235.0 Wavelength H alpha Exposure:  20050204.* Temp.:   RH (%):  73 Grating 6 Wavelength 5500 A Tilt 359
Echelle Tilt 20.55 Slit 275 Sky Conditions:  Patchy Clouds/Clds/Haze
Det. Temp. -95C Slit ~200 microns Focus 6.45


Exp #
Start Time
(UT)
Dur
(s)
HA
Start
E/L
Object
Sp. Type
V
Mag
ADU's
(/pix)
Comments
01-05
23:16
0

E
Bias


74

06-10
23:29
5

E
Flat


4501

11
23:51
300

E
Th-Ar


88
clouds in the west, humidity rising... this may not last long
12
23:59
1200
+2:25
E
gamma Cas
B0 IVe
2.5
126
through clouds                    #13 0:22 Th-Ar
14
0:49
300
-1:01
E
beta Ori
B8 Ia
0.1
115
through even more clouds.  #15 0:57 Th-Ar
16-20
1:05
0

E
bias


77
now it's truly overcast, closing
21-25
1:32
4

E
flat


3925

26
5:17
300

E
Th-Ar


87
Reopening. Haze but no clouds, RH 82% - NDM
27
5:25
0

L
Bias (5X)


136

28
5:26
300
+1:05
E
beta Gem
K0 IIIb
1.1

#29 5:34 Th-Ar
30
5:54
180

L
Fe-Ar


186

31
6:01
300
-0:43
L
alpha Leo
B7Vn
1.4
1889
#32 6:07 Fe-Ar #33 6:16 Th-Ar
34
6:25
1200
-0:19
E
alpha Leo
B7Vn
1.4
248
#35 6:48 Th-Ar #36 7:20 Fe-Ar - after looking for targets
37
7:29
1200
-0:23
L
phi Leo
A7IVn
4.5
711
Telluric std LDS #37 7:51 Fe-Ar; phi Leo overwritten, do again
38
7:59
1200
+0:07
L
phi Leo
  "
"
680
#39 8:20 Fe-Ar
40
8:31
600
+0:05
L
beta Vir
F9V
3.6
687
RV std LDS
41
8:44
180

L
Fe-Ar

194

42-46
8:57
5

E
Flat


4143

47
8:58
30

L
Flat (5X)


4480

  48-52 9:10    Bias      75
 #53 Bias LDS 5X 9:11 137