CCD Observing Log of Ritter Observatory
Page  1 of  1

Echelle settings UT Date: 2005 Sep 30
Observer:  GBT,JH/NDM
LDS Settings
X-Disp Tilt: 235.0 λc: Hα Exposure: 20050930.xxx
Temp.: 68 F
RH (%):65
Grating: 6 λc: Hα Tilt: 3o
Echelle Tilt: 21.95 Slit: 275 Sky Conditions: mostly clear - passing clouds/thin clds
Slit: 255 Det. Temp.: -95oC Focus: 5.70


Exp #
Start Time
(UT)
Dur
(s)
HA
Start
E/L
Object
Sp. Type
V
Mag
ADU's
(/pix)
Comments
1-5
00:10
0
zenith
E
bias


79

6-10
00:27
5
"
E
flat


4123

11
00:51
300
-01:07
E
Th-Ar


100

12
01:10 3000
-00:49
E
59 Cyg
B1.5Vnne
4.7
107
#13 Th-Ar 2:05
14
02:44 300
01:04 E
 alpha Cyg A2Ia 1.3
193
#15 Th-Ar 2:59; inserted HTML α 
16
03:32
300
01:53
E
 alpha Cyg A2Ia 1.3 177
tweaked focus - cloud interference; #17 Th-Ar 3:41
18
04:13
2400
01:29
E
 nu Cep
A2Ia
4.3
153
#19 Th-Ar 4:57 - Fixed header, adjusted focus
20
5:36
300
-0:18
E
alpha Cas
K0IIIa
2.2
107
??? Counts?? do not reduce.
21
6:45
300
+0:54
E
Th-Ar


101
Continue to adjust ... give up, double exp times, or more
22
6:53
600
+1:15
E
alpha Cas K0IIIa 2.2
129
#23 7:06 Th-Ar ... poor transparency??
24-28
7:15
0

E
Bias


80
Yes, there are clouds in Cassiopeia. Quit. RH 91.5%
29-33
7:31
8

E
Flat


3425