BPM 37093 Fourier Transforms
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Running FT of Bruce 99/04/22 14:04:00 UT
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The power is moving...
Does anyone have observing
time after the WET run in
the southern hemisphere who is willing to
take follow up data
on BPM37093?
Optical FT overlapping with HST 99/04/21 17:07:35 UT
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The FT of optical data overlapping with HST.
X17 (2-62) vs. X16 Main Power 99/04/21 09:17:46 UT
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Then and now: Xcov 17 chunks
2-62 (through ita190499) vs. Xcov16 regions of main power.
Bruce's main power(up to ap1999q4) 99/04/20 15:09:24 UT
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Running FT of Bruce 99/04/20 15:07:56 UT
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HST observed Bruce during
(4), before the power at
1820 microHz
kicked in.
Corrected BPM Xcov17 First/Second Half DFT 99/04/20 10:40:30 UT
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1st half/2nd half DFTs of Xcov17 BPM data chunks 2-49.
This is a corrected version of the one posted previously which had an incorrect X-scale for the first half dft.
Bruce now and then 99/04/19 14:26:35 UT
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BPM Xcov17 First/Second Half DFT 99/04/19 11:27:57 UT
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First half/second half DFTs of
Xcov17 BPM data so far (chunks 2-49). There are significant differences!
Updated Xcov17 (2-49) vs Xcov16 DFT 99/04/18 10:38:35 UT
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Xcov17 chunks 2-49 (through tsm-0047) vs.
Xcov16 BPM DFTs over region of main power
Bruce (2-47) 1800-2000 muHz 99/04/17 15:44:55 UT
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Bruce (2-47) 1700-1900 muHz 99/04/17 15:42:46 UT
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Bruce (2-47) 1500-1700 muHz 99/04/17 15:42:26 UT
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Bruce (2-47)1400-1600 muHz 99/04/17 15:42:08 UT
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Now (2-47) and then 99/04/17 15:06:20 UT
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X17 BPM 2-45 DFT 99/04/16 12:35:14 UT
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1800-2000microhz
chunks 2-45
X17 BPM 2-45 DFT 99/04/16 12:34:57 UT
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1750-1950microhz
chunks 2-45
X17 BPM 2-45 DFT 99/04/16 12:34:31 UT
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1500-1700microhz
chunks 2-45
BPM 37093 Xcov16/Xcov17 DFT 99/04/16 11:23:13 UT
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Xcov17 DFT chunks 2-45 (through tsm-0045). Note the
better Xcov17 window!!!!
X16/X17 Main Power Comparison 99/04/16 08:18:51 UT
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Xcov17 BPM 37093 main power
chunks 2-44 (through tsm-0044 and tsm-0042)
Main Power X16/X17 Comparison 99/04/16 07:24:00 UT
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Bruce's main power comparison.
Xcov16 vs. Xcov17 chunks 2-41,
through saccd007.
Bruce's main power now and then 99/04/14 18:05:18 UT
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Periods identified last year
is marked by arrows. The
number corresponds
to the periods. I will post
the period table for xcov17
data ASAP.
Xcov17 (2-28) and Xcov16 Comparison 99/04/14 10:57:20 UT
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Current Xcov17 DFT (through ap1399) compared to that from
Xcov 16.
Main Power Comparision 99/04/12 13:47:05 UT
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Updated main power plot
of BPM37093 from this
WET run and last yaer WET run.
Top panel shows main power
of Xcov17 using chunks2-20,
second panel shows main power
from last year and the bottom
shows the windows for the two
WET runs.
Main Power of BPM37093 99/04/11 16:08:27 UT
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From the top panel, the main
power of BPM37093 during this WET run.
the FT from WET run last year, and the bottom panel shows the windows for each
WET runs. Notice there seem
to be power in ~1950 microHz this year which was not noticable last year and the power around 1700-1800microHz
we saw last year are not that
big this year.
DFT of BPM37093 99/04/08 21:45:45 UT
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The DFT of ap0899q1. BPM37093 is still pulsating!
Bruce (2-47) window 1500-1700 muHz 99/04/17 15:47:02 UT
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This window accompanies the
4 regional FTs created from
2-47 chunkcs.
X17 BPM 2-45 Regional Window 99/04/16 12:36:08 UT
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200microhz full x-scale
to match 2-45 regional DFTs
Bruce Xcov17 2-62 Prewhitening 99/04/21 12:40:40 UT
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Comparison of (2-62) DFT with
one with the 4 largets peaks
removed. Note the expected
sidelobes in each case split by about 1 microhz -the expected timescale given Atsuko's amplitude plots. So the question now is: is this the chicken or the egg?
Prewhitened FT 99/04/20 17:18:08 UT
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Took out 633,531,512sec modes.
Periods are from the 2nd half
data which has better
window than the 1st half,
but the phase and amp info was taken from the 1st
half.
The solid line on top panel
shows the prewhitened FT,
while the dotted line shows
the FT before prewhitening.
The | mark on the top panel
shows the amplitude of the
three modes during the 2nd
half of the run.
Before and after prewhitening 99/04/16 19:19:56 UT
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Solid line = after prewhitening
Dotted line = before prewhitening.
I used 633, 624, 530, 511 sec modes
for prewhitening. We will
keep on looking for modes.
Amplitude through the run 99/04/22 15:21:36 UT
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633sec and 531sec modes
seem anticorrelated.
549sec mode is growing large.
Amplitude through XCov17 99/04/20 20:29:52 UT
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Amplitude of three modes
through the run.
The periods were determined
from the total XCov17 light
curve. The amplitudes were obtained by fitting the periods obtained
above to the 2-day
lightcurves used in the
running FT.
calar alto masking field 99/04/12 22:02:36 UT
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Just showing off the goods
from Calar Alto
Individual FTs 2 99/04/11 10:57:25 UT
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same as above
2nd LC of BPM37093 99/04/08 12:06:19 UT
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CCD run from SAAO.
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