CCD Observing Log of Ritter Observatory
Page  1 of  1

Echelle settings UT Date:  2005-Apr-11
Observer:  NDR
LDS Settings
X-Disp Tilt 235.0 Wavelength H alpha Exposure:  20050411.*
Temp.:  20 C
RH (%):   58
Grating 6 Wavelength H alpha
Tilt 3
Echelle Tilt 20.55 Slit 275 Sky Conditions:  cirrus clds
Slit 240
Det. Temp. -95C Focus 6.27


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

E
Bias


75
may be a sucker hole
06-10
0:28
4

E
Flat


4224

11
0:51
300

E
ThAr


102

12
1:02
900
+3:09
E
epsilon Ori
B0Ia
1.70
239
seeing is horrible!  #13 1:20 ThAr
14
1:33
1200
+1:49
E
beta CMi
B8Ve
2.90
149
starting to clear?  #15  1:57  ThAr
16
2:10
600
+2:08
E
beta Gem
K0IIIb
1.14
163
rv std  #17  2:19  ThAr
18-22
2:30
0

E
Bias


76
clouds coming in, closing
23
2:42
4

E
Flat


4972
counts a little high, shortening exposure for remaining flats
24-27
2:46 3
E
Flat


3713