Fourier transform plot (1500 to 1900 microHz) of the BPM 37093 data chunks 1-106. This seems to be the most interesting part of the transform (see the multipanel plots below).

1500-1900 microHz: VIEW larger image (10 kb GIF)    DOWNLOAD PostScript file    (gzipped, 12 kb)

Prewhitening of the 1500 to 1900 microHz region using the BPM 37093 data chunks 4-106. The blue peaks might appear at first glance to be separated by the window width from others, but prewhitening seems to imply this is not so. The black arrows suggest an equally split grid of five modes, with an average frequency spacing of 13.37 microHz. This happens to be about 1/0.66 times the 8.82 microHz (average) splitting seen in two other pairs (see the table, below). It would be interesting to see if the run of amplitude vs. wavelength (from the HST data) is consistent with different l-identifications for the groups with 8.82 versus 13.37 microHz splitting. -Sean

1500-1900 microHz: VIEW larger image (10 kb GIF)    DOWNLOAD PostScript file    (gzipped, 12 kb)

Here is the current list of peaks in this region larger than approximately 0.7 mma (but see the above prewhitening plot), based on the 106 PMT data chunks obtained during the WET run:

Peak Number	FREQ [uHz]	Period [s]	amp [mma]	Tmax(0) [s]	Comments
1	1570.62	636.692	1.55	205.9	These two peaks are separated by 8.60 (+/- 0.03) microHz
2	1579.22	633.225	0.84	55.4
3	1630.01	613.495	1.02	310.8
4	1664.78	600.681	0.70	500.1
5	1718.26	581.985	1.07	95.6
6	1768.47	565.460	1.19	157.2	These two peaks are separated by 9.03 (+/- 0.03) microHz
7	1777.50	562.588	1.03	509.8
8	1823.44	548.413	1.11	24.5

Fourier transform plot (125 to 2125 microHz) of the BPM 37093 data chunks 1-106.

VIEW larger image (11 kb GIF)    DOWNLOAD PostScript file    (gzipped, 22 kb)

Fourier transform plot (125 to 2125 microHz) of the BPM 37093 data chunks 1-106.

VIEW larger image (9 kb GIF)    DOWNLOAD PostScript file    (gzipped, 19 kb)

Raw Data Log        Data Reduction Log

Transforms of Individual Runs
Run Name	Telescope	Observer	Instrument	Comments
an69fix	CTIO 1.5m	Atsuko Nitta	3-ch PMT	Possible Timing Problem
an-0070	CTIO 1.5m	Atsuko Nitta	3-ch PMT
an-0073	CTIO 1.5m	Atsuko Nitta	3-ch PMT
dj-001	SAAO 1.9m	Darragh O'Donoghue Jurek Krzesinski	1-ch PMT	Very short run, due to clouds. Sky counts three times normal.
an-0074	CTIO 1.5m	Atsuko Nitta	3-ch PMT
sa-j002	SAAO 1.9m	Darragh O'Donoghue Jurek Krzesinski	1-ch PMT	Fixed three second timing error. Sky counts three times normal. (problem fixed for subsequent runs).
an-0075	CTIO 1.5m	Atsuko Nitta	3-ch PMT
dj-003	SAAO 1.9m	Darragh O'Donoghue Jurek Krzesinski	1-ch PMT
ro108	LNA 1.6m	Odilon Giovannini	1-ch PMT
ap2498q2	Mt. John 1.0m	Denis Sullivan	1-ch PMT
dj-004	SAAO 1.9m	Darragh O'Donoghue Jurek Krzesinski	1-ch PMT	Absolutely beautiful.
ap2598q1	Mt. John 1.0m	Denis Sullivan Scot Kleinman	1-ch PMT
ap2598q2	Mt. John 1.0m	Denis Sullivan Scot Kleinman	1-ch PMT
dj-005	SAAO 1.9m	Darragh O'Donoghue Jurek Krzesinski	1-ch PMT
ro112	LNA 1.6m	Odilon Giovannini	1-ch PMT	Check out the amplitude!
ap2698q1	Mt. John 1.0m	Denis Sullivan Scot Kleinman	3-ch PMT
dj-006	SAAO 1.9m	Darragh O'Donoghue Jurek Krzesinski	1-ch PMT
an-0077	CTIO 1.5m	Atsuko Nitta	3-ch PMT
dj-007	SAAO 1.9m	Darragh O'Donoghue Jurek Krzesinski	1-ch PMT
gv-0522	ESO 2.2m	Gerard Vauclair Michel Chevreton	3-ch PMT
db9801	SAAO 1.9m	David Buckley	1-ch PMT
db9802	SAAO 1.9m	David Buckley	1-ch PMT
gv-0523	ESO 2.2m	Gerard Vauclair Michel Chevreton	3-ch PMT
gv-0524	ESO 2.2m	Gerard Vauclair Michel Chevreton	3-ch PMT
db9803	SAAO 1.9m	David Buckley	1-ch PMT
db9805	SAAO 1.9m	David Buckley	1-ch PMT
db9806	SAAO 1.9m	David Buckley	1-ch PMT