Signal Synchronization Strategies and Time Domain SETI with Gaia DR3

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Draft version August 2, 2023
Typeset using L
A
TEX preprint2 style in AASTeX631
Signal Synchronization Strategies and Time...

2 Nilipour et al.
for extraterrestrial intelligence (SETI) Ellip-
soid, and it can be used to greatly constrain
the number...

Time Domain SETI with Gaia DR3 3
0 1000 2000 3000 4000 5000
Distance (lyr)
10 2
10 1
100
101
102
103
104
105
Distance
Unce...

4 Nilipour et al.
Source Event
Earth
1
2
3
4
d1
d2
Figure 3. Diagram of the SETI Ellipsoid, which has its foci at the sour...

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Time Domain SETI with Gaia DR3 5
10000 7500 5000 2500 0 2500 5000 7500 10000
Y (pc)
6000
4000
2000
0
2000
4000
Z
(pc)
SN19...

6 Nilipour et al.
or previous observations can be used to ex-
plore these stars.
It may be unreasonable to assume that an ...

Time Domain SETI with Gaia DR3 7
4000 3000 2000 1000 0 1000 2000 3000 4000
Y (pc)
4000
3000
2000
1000
0
1000
2000
3000
400...

8 Nilipour et al.
200 150 100 50 0 50 100 150 200
X (pc)
200
150
100
50
0
50
100
150
200
Z
(pc)
Stars Crossing SETI Ellips...

Time Domain SETI with Gaia DR3 9
line Ex connecting Earth and a technosignature
candidate system, is such a point in space...

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10 Nilipour et al.
14h 16h 18h 20h 22h 0h 2h 4h 6h 8h 10h
-75°
-60°
-45°
-30°
-15°
0°
15°
30°
45°
60°
75°
Gaia Stars - Set...

Time Domain SETI with Gaia DR3 11
which is identical to the crossing time equation
for the SETI Ellipsoid. As seen in Figu...

12 Nilipour et al.
14h 16h 18h 20h 22h 0h 2h 4h 6h 8h 10h
-75°
-60°
-45°
-30°
-15°
0°
15°
30°
45°
60°
75°
Candidate Spatia...

Time Domain SETI with Gaia DR3 13
Table
2.
Table
of
Candidate
Targets
ID
RA
Dec
Dist
a
Dist84
a
Dist16
a
X
b
Y
b
Z
b
G
c
G...

14 Nilipour et al.
variable stars at all, and so a technosignature
search in the light curves of these objects is not
futi...

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Time Domain SETI with Gaia DR3 15
0.96
0.98
1.00
Source 4738129894277454336 Light Curve
G
1.00
1.02
Normalized
Flux
BP
0 2...

16 Nilipour et al.
0 200 400 600 800
BJD +2.457e6
0.96
0.97
0.98
0.99
1.00
1.01
Normalized
Flux
SN Correlation
Stellar LC
...

Time Domain SETI with Gaia DR3 17
0 2 4 6 8 10
Frequency
0.00
0.25
0.50
0.75
1.00
Power
Source 5633777360297734016 Periodo...

18 Nilipour et al.
0 2 4 6 8 10
Frequency
0.00
0.25
0.50
0.75
1.00
Power
Source 3444070610365980928 Periodograms and Light...

Time Domain SETI with Gaia DR3 19
from random variation and noise given the lim-
its of the Gaia epoch photometry.
7. CONC...

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20 Nilipour et al.
0.9
1.0
1.1
Source 5248299956676144256 Light Curve
G
0.9
1.0
1.1
Normalized
Flux
BP
0 200 400 600 800
B...

Time Domain SETI with Gaia DR3 21
lease 4, which will include 66 months of epoch
photometry for all 2 billion sources.
The...

22 Nilipour et al.
Pérez, F., Granger, B. E. 2007, Computing in
Science and Engineering, 9, 21,
doi: 10.1109/MCSE.2007.5...

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