Ritter Observatory Nightly Log Sheets
Portion of raw image of the Fe-Ar calibration lamp taken with the Low-Dispersion Spectrograph, shown in false color
Since early November 2004, our observers have been filling in the observing log on line. Here you may display the log sheet for each night of observations, as well as a few nights on which observations were attempted but not made. For a key to the observers' initials, see the Observing Schedule.
Previously, the logs were handwritten. Copies for any given night are available on request to the Observatory Research Assistant, James Davidson.
If you would like to search for observations of a given target, that is best done (for observations made before 2007 April) here. Observations made after that date are, for the most part, not yet reduced, and therefore are not indexed.
Explanation of the "ADU's (/pix)" column (indicator of exposure level)
- For the échelle: maximum value of mean of all rows of CCD. If this number is about 160 or above, the signal-to-noise ratio in the reduced spectrum will be 100 or better, per pixel, in the H alpha region.
- For the LDS: average value in box in middle of spectrum. Here the benchmark value for a SNR of 100 or better, per pixel, is about 500 ADU.
2004 (UT)
- November 6, 7, 8, 9, 10, 13, 14 (page 1, page 2), 15, 22, 23, 26, 29
- December 2, 4, 16, 17, 18, 20
2005 (UT)
- January 15, 16, 17, 28, 29, 31
- February 2, 4, 5, 11, 13, 25, 27
- March 3, 4, 7, 9, 13, 14, 16, 17, 19, 25, 27, 29, 31
- April 1, 4 (page 1, page 2), 5, 6, 9, 10, 11, 12, 13, 14, 15, 16, 17, 19, 20, 22
- May 1,
4,
5,
6,
9,
11,
15,
17,
18,
21,
22,
23,
26
- June 7,
8,
14,
17,
20,
21,
23,
23,
24,
27
- July 2,
3,
4,
8,
9,
10
- August 18,
28
- September 1,
3,
5,
7,
8,
10,
11,
12,
13,
14,
21,
22 (page 1, page 2),
27,
28,
30
- October 1,
2,
4,
5,
6,
14,
15,
17,
20,
29,
30,
31
- November 2,
3,
5,
8,
11,
12,
21,
23
- December 6,
8,
13,
18,
20
2006 (UT)
- January 9,
13,
15,
17,
22,
24,
27
- February 2,
7,
9,
15,
19,
21,
22,
23,
24,
26,
- March 4,
5,
7,
16,
18,
19,
20,
22
- April 6,
9,
11,
15,
16,
19,
20,
25,
26,
27,
28,
29
- May 4,
5,
6,
8,
9,
22,
23,
24,
27,
28,
29,
30
- June 4,
5,
6,
9,
15,
16,
17,
18,
26,
28,
30
- July 1,
5,
6,
7,
8,
9,
14,
16,
17,
18,
19,
20,
24,
29,
30
- August 1,
2,
8,
9,
12
- September 4,
7,
8,
9,
21,
25,
26,
27,
29
- October
2,
4,
7,
8,
9,
16,
26,
30
- November
1,
2,
4,
10,
21,
22,
25
- December
4,
10,
14,
15,
19,
20,
25,
29
2007 (UT)
- January
3,
4,
7,
11,
17,
18,
21,
23,
27
- February
3,
5,
8,
9,
24
- March
5,
6,
8,
9,
11,
12,
16,
18,
19,
23,
30
Ritter observations with camera CCD1 end here. Log sheets for the new camera, CCD3, will be posted as data are reduced.
- April
- May
- June
- July
- August
- September
- October
- November
- December
Document custodian: Nancy Morrison
Page last updated: August 28, 2011