DATE |
1980 |
| OBSERVER(S) |
WITTEBORN |
| SITE |
NASA - U OF A, MT. LEMON |
| INSTR. SIZE (M) |
1.5 |
| SEARCH FREQ. (MHz) |
8.5 - 13.5 |
| FREQ. RES. (Hz) |
1 |
| OBJECTS |
20 STARS |
| FLUX LIMITS (W/m
2
) |
N MAGNITUDE EXCESS < 1.7 |
| TOTAL HOURS |
50 |
| REFERENCE |
|
| COMMENTS |
Search for IR excess due to Dyson spheres around solar type stars. Target stars were chosen because too faint for spectral type. |
|
| DATE |
1980 1981 |
| OBSERVER(S) |
SUCHKIN, TOKAREV ET AL. |
| SITE |
NIRFI, GORKII, GAISH, MOSCOW |
| INSTR. SIZE (M) |
|
| SEARCH FREQ. (MHz) |
9.3 MHz PULSED RADAR |
| FREQ. RES. (Hz) |
1500 |
| OBJECTS |
L4 & L5 LIBRATION POINTS OF EARTH-MOON SYSTEM |
| FLUX LIMITS (W/m
2
) |
|
| TOTAL HOURS |
20 |
| REFERENCE |
30 |
| COMMENTS |
Radar reflections sought from artifacts in parking orbits. |
|
| DATE |
1981 |
| OBSERVER(S) |
LORD & O'DEA |
| SITE |
U. MASS |
| INSTR. SIZE (M) |
14 |
| SEARCH FREQ. (MHz) |
115000 |
| FREQ. RES. (Hz) |
20,000 125,000 4 x 10
8
|
| OBJECTS |
NORTH GALACTIC ROTATION AXIS b = 5° -> 90° |
| FLUX LIMITS (W/m
2
) |
1 x 10
-21
|
| TOTAL HOURS |
50 |
| REFERENCE |
|
| COMMENTS |
Search for signals J=1-0 CO line from a transmitter somewhere along the Galactic rotation axis. |
|
| DATE |
1981 |
| OBSERVER(S) |
SHOSTAK & TARTER SIGNAL |
| SITE |
WRST |
| INSTR. SIZE (M) |
3000 MAX BASELINE |
| SEARCH FREQ. (MHz) |
1420.4 REL. TO GAL. CEN. B = 156 kHz |
| FREQ. RES. (Hz) |
1200 |
| OBJECTS |
GALACTIC CENTER |
| FLUX LIMITS (W/m
2
) |
1 x 10
-24
|
| TOTAL HOURS |
4 |
| REFERENCE |
39 |
| COMMENTS |
Use of interferometer to search for pulsed signals from Galactic Center in range of periods from 40 seconds to 2 hours. |
|
| DATE |
1981 |
| OBSERVER(S) |
TALENT |
| SITE |
KPNO |
| INSTR. SIZE (M) |
2.1 |
| SEARCH FREQ. (MHz) |
3575 - 5350 |
| FREQ. RES. (Hz) |
10 |
| OBJECTS |
3 STARS |
| FLUX LIMITS (W/m
2
) |
|
| TOTAL HOURS |
0.2 |
| REFERENCE |
31 |
| COMMENTS |
Search for enhanced stellar lines of praseodymium, neodymium, zirconium as evidence for dumping of nuclear wastes into stellar atmospheres. |
|
| DATE |
1981 |
| OBSERVER(S) |
TARTER & ISRAEL |
| SITE |
WRST |
| INSTR. SIZE (M) |
3000 MAX BASELINE |
| SEARCH FREQ. (MHz) |
1420 |
| FREQ. RES. (Hz) |
4 x 10
6
, 10 x 10
6
|
| OBJECTS |
85 STAR FIELDS |
| FLUX LIMITS (W/m
2
) |
6 x 10
-22
to 6 x 10
-24
|
| TOTAL HOURS |
600 |
| REFERENCE |
18 |
| COMMENTS |
Parasitic search similar to Israel & DeRuiter using uncleaned maps stored at Groningen & Leiden, & AGK3 catalog. |
|
| DATE |
1981 1982 |
| OBSERVER(S) |
VALDES & FREITAS SETA |
| SITE |
KPNO |
| INSTR. SIZE (M) |
0.61 |
| SEARCH FREQ. (MHz) |
5500 |
| FREQ. RES. (Hz) |
|
| OBJECTS |
EARTH-MOON THROUGH L5, SUN-EARTH L1, L2 |
| FLUX LIMITS (W/m
2
) |
10 = m
v
= 19 (magnitude) |
| TOTAL HOURS |
70 |
| REFERENCE |
22 |
| COMMENTS |
Attempt to see discrete artifacts (= few m in size) in stable orbits near Lagrange points. Studies 137 III aF photographic plates. |
|
| DATE |
1981 1988 |
| OBSERVER(S) |
BIRAUD & TARTER |
| SITE |
NANCAY |
| INSTR. SIZE (M) |
40 x 240 |
| SEARCH FREQ. (MHz) |
1420.4 320 kHz, 1665 - 1667 |
| FREQ. RES. (Hz) |
48.8 |
| OBJECTS |
343 STARS |
| FLUX LIMITS (W/m
2
) |
1 x 10
-24
|
| TOTAL HOURS |
~600 |
| REFERENCE |
28 |
| COMMENTS |
Eight level, 1024 channel auto-correlator, with stepped first LO to extend frequency coverage at 48 Hz resolution. |
|
| DATE |
1982 |
| OBSERVER(S) |
HOROWITZ, TEAGUE, LINSCOTT, CHEN & BACKUS, SUITCASE SETI |
| SITE |
NAIC |
| INSTR. SIZE (M) |
305 |
| SEARCH FREQ. (MHz) |
2840.8 (B=4 kHz) & 1420.4 (B=2 kHz) |
| FREQ. RES. (Hz) |
0.03 (1-LINEAR) & 0.03 (2-CIRCULAR) |
| OBJECTS |
250 STARS & 150 STARS |
| FLUX LIMITS (W/m
2
) |
4 x 10
-26
& 6 x 10
-28
|
| TOTAL HOURS |
75 |
| REFERENCE |
25 |
| COMMENTS |
Dual 64K channel real time microprocessor based spectrum analyzer with video archiving & swept LO frequency to test magic frequencies. |
|
| DATE |
1982 |
| OBSERVER(S) |
VALLEE & SIMARD-NORMANDIN |
| SITE |
ARO |
| INSTR. SIZE (M) |
46 |
| SEARCH FREQ. (MHz) |
10,522 |
| FREQ. RES. (Hz) |
185 MHz |
| OBJECTS |
GALACTIC CENTER MERIDIAN |
| FLUX LIMITS (W/m
2
) |
1 x 10
-19
|
| TOTAL HOURS |
72 |
| REFERENCE |
40 |
| COMMENTS |
Search for strongly polarized signals by mapping field 1/4' x 25' along l = 0. |
|
| DATE |
1983 |
| OBSERVER(S) |
DAMASHEK |
| SITE |
NRAO |
| INSTR. SIZE (M) |
92 |
| SEARCH FREQ. (MHz) |
390 8 |
| FREQ. RES. (Hz) |
2 x 10
6
|
| OBJECTS |
SKY SURVEY (PULSARS) |
| FLUX LIMITS (W/m
2
) |
2 x 10
-22
|
| TOTAL HOURS |
700 |
| REFERENCE |
|
| COMMENTS |
Sixteen MHz sampled at 60 Hz; 8 contiguous frequency channels. Search for single dispersed pulses and telemetry (bit stream) signals. |
|
| DATE |
1983 |
| OBSERVER(S) |
VALDES & FREITAS |
| SITE |
HCRO |
| INSTR. SIZE (M) |
26 |
| SEARCH FREQ. (MHz) |
1516 2.5 |
| FREQ. RES. (Hz) |
4.9 & 76 kHz |
| OBJECTS |
80 STARS & 12 NEARBY STARS |
| FLUX LIMITS (W/m
2
) |
3 x 10
-24
|
| TOTAL HOURS |
100 |
| REFERENCE |
29 |
| COMMENTS |
Search for radioactive tritium line from Nuclear fusion by another technology. |
|
| DATE |
1983 1984 |
| OBSERVER(S) |
CULLERS |
| SITE |
AMSETI |
| INSTR. SIZE (M) |
2 |
| SEARCH FREQ. (MHz) |
~1420 & = 1000 |
| FREQ. RES. (Hz) |
|
| OBJECTS |
|
| FLUX LIMITS (W/m
2
) |
|
| TOTAL HOURS |
CONTINUING |
| REFERENCE |
|
| COMMENTS |
Low noise GaAs FETS and micros with satellite TV dishes, by Silicon Valley Hams, with NASA Ames consultation. |
|
| DATE |
1983 1985 |
| OBSERVER(S) |
HOROWITZ SENTINEL |
| SITE |
OAK RIDGE (HARVARD UNIVERSITY) |
| INSTR. SIZE (M) |
26 |
| SEARCH FREQ. (MHz) |
1420.40575 & 1667.3590 |
| FREQ. RES. (Hz) |
0.03 DUAL CIRCULAR (B=2 kHz) |
| OBJECTS |
SKY SURVEY |
| FLUX LIMITS (W/m
2
) |
5 x 10
-25
|
| TOTAL HOURS |
CONTINUING |
| REFERENCE |
25 |
| COMMENTS |
Suitcase SETI as the backend of automated sky survey at 2 magic frequencies over a 3 year observing period. |
|
| DATE |
1983 1988 |
| OBSERVER(S) |
GRAY |
| SITE |
SMALL SETI OBSERVATORY |
| INSTR. SIZE (M) |
4 |
| SEARCH FREQ. (MHz) |
1419.5 - 1421.5 |
| FREQ. RES. (Hz) |
40 TO 1 Hz |
| OBJECTS |
SKY SURVEY & -27 |
| FLUX LIMITS (W/m
2
) |
1 x 10
-22
|
| TOTAL HOURS |
CONTINUING |
| REFERENCE |
41 |
| COMMENTS |
Dedicated meridian transit search system constructed by amateurs, operated during evenings. |
|
| DATE |
1983 1988 |
| OBSERVER(S) |
STEPHENS |
| SITE |
INTERSTELLAR ELECTRO-MAGNETICS INSTITUTE AT HAY RIVER, NWT |
| INSTR. SIZE (M) |
TWO 18m x 18m (28m EQUIVALENT) |
| SEARCH FREQ. (MHz) |
1415 - 1425 |
| FREQ. RES. (Hz) |
30 kHz |
| OBJECTS |
NORTHERN SKY SURVEY |
| FLUX LIMITS (W/m
2
) |
T
sys
~75K |
| TOTAL HOURS |
CONTINUING |
| REFERENCE |
|
| COMMENTS |
Two sixty four foot square surplus tropo-scatter dishes combined for use as dedicated amateur SETI observatory. Coverage is 30 -> 45 declination. Discontinued due to lack of funding. |
|
| DATE |
1983 ON |
| OBSERVER(S) |
GULKIS |
| SITE |
DSS 43 |
| INSTR. SIZE (M) |
64 |
| SEARCH FREQ. (MHz) |
8 GHz & 2380 5 MHz |
| FREQ. RES. (Hz) |
40 kHz |
| OBJECTS |
PARTIAL SOUTHERN SKY |
| FLUX LIMITS (W/m
2
) |
2 x 10
-22
|
| TOTAL HOURS |
800 ON |
| REFERENCE |
24 |
| COMMENTS |
Sky survey of constant declination strips (3 from -28.9 to -34.3 by April 1983) whenever antenna stowed. |
|
| DATE |
1984 |
| OBSERVER(S) |
SLYSH |
| SITE |
SATELLITE |
| INSTR. SIZE (M) |
RADIOMETER |
| SEARCH FREQ. (MHz) |
37 x 10
3
|
| FREQ. RES. (Hz) |
4 x 10
8
|
| OBJECTS |
ALL SKY 3 K BB |
| FLUX LIMITS (W/m
2
) |
T/T = .01 |
| TOTAL HOURS |
6000 |
| REFERENCE |
26 |
| COMMENTS |
Lack of fluctuations 3 = K background radiation on angular scales of 10
-2
Strd. rules out optically thick Dyson spheres radiating more than 1 L
o
within 100 pc. |
|
| DATE |
1985 1995 |
| OBSERVER(S) |
HOROWITZ META SETI |
| SITE |
OAKRIDGE (HARVARD UNIVERSITY) |
| INSTR. SIZE (M) |
26 |
| SEARCH FREQ. (MHz) |
1420.4, 1665.4, 1667.3 & 2840.8 |
| FREQ. RES. (Hz) |
0.05 |
| OBJECTS |
SKY SURVEY |
| FLUX LIMITS (W/m
2
) |
1.3 x 10
-24
|
| TOTAL HOURS |
CONTINUING |
| REFERENCE |
27 |
| COMMENTS |
Signal Processing Hardware from SENTINEL was replicated 128 times to produce 8.4 x 10
6
channels. Six sequential observations of each patch of sky are made to cover 2 orthogonal circular polarizations & 3 rest frames (Sun/Earth, Galactic Center, 3 K Background). |
|
| DATE |
1985 ON |
| OBSERVER(S) |
BOWYER, WERTHEIMER & LAMPTON SERENDIP II |
| SITE |
NRAO |
| INSTR. SIZE (M) |
92 |
| SEARCH FREQ. (MHz) |
400 TO 3500 |
| FREQ. RES. (Hz) |
1 |
| OBJECTS |
SKY AREAS OBSERVED BY ASTRONOMERS |
| FLUX LIMITS (W/m
2
) |
4 x 10
-24
|
| TOTAL HOURS |
CONTINUING |
| REFERENCE |
34 |
| COMMENTS |
Automated search that piggybacks on radioastronomical observations. Scans available 3.5 MHz of available IF 65 KHz at a time, recording events above threshold for off line processing. |
|
| DATE |
1986 |
| OBSERVER(S) |
ARKHIPOV |
| SITE |
|
| INSTR. SIZE (M) |
|
| SEARCH FREQ. (MHz) |
408 MHz |
| FREQ. RES. (Hz) |
|
| OBJECTS |
HD 21899, HD 100623, HD 187691 & HD 187923 |
| FLUX LIMITS (W/m
2
) |
|
| TOTAL HOURS |
|
| REFERENCE |
33 |
| COMMENTS |
Search through 408 MHz Molonglo Survey Catalog of Radio Sources found 4 solar-type stars within 130" of radio source position. Suggested as leakage emission from orbital industrial processing facility ~1000 AU from star. |
|
| DATE |
1986 |
| OBSERVER(S) |
MIRABEL |
| SITE |
NRAO |
| INSTR. SIZE (M) |
43 |
| SEARCH FREQ. (MHz) |
4829.620 - 4829.776 |
| FREQ. RES. (Hz) |
76 |
| OBJECTS |
GALACTIC CENTER & 33 NEARBY STARS |
| FLUX LIMITS (W/m
2
) |
6 x 10
-25
to 10
-24
|
| TOTAL HOURS |
144 |
| REFERENCE |
|
| COMMENTS |
Search at H
2
CO frequency. Included star HD170493 located in front of dark anti-maser cloud. |
|
| DATE |
1986 1989 |
| OBSERVER(S) |
DIXON & BOLINGER |
| SITE |
OSURO |
| INSTR. SIZE (M) |
53 |
| SEARCH FREQ. (MHz) |
1400 - 1700 |
| FREQ. RES. (Hz) |
100, 10 and 2 kHz |
| OBJECTS |
ALL SKY SEARCH |
| FLUX LIMITS (W/m
2
) |
1.5 x 10
-22
|
| TOTAL HOURS |
20,000 |
| REFERENCE |
|
| COMMENTS |
|
|
| DATE |
1986 ON |
| OBSERVER(S) |
COLOMB, MARTIN & LEMARCHAND |
| SITE |
IAR |
| INSTR. SIZE (M) |
30 |
| SEARCH FREQ. (MHz) |
1415.4057, 1425.4057 & 1667 |
| FREQ. RES. (Hz) |
2.5 kHz |
| OBJECTS |
78 SOLAR-TYPE STARS |
| FLUX LIMITS (W/m
2
) |
5 x 10
-23
|
| TOTAL HOURS |
320 |
| REFERENCE |
32 |
| COMMENTS |
34 of 78 Southern Hemisphere solar-type stars have been examined at 21cm to date. All stars will be searched at 21 cm & 18 cm within 1 yr. |
|
| DATE |
1987 |
| OBSERVER(S) |
GRAY |
| SITE |
OAK RIDGE (HARVARD UNIVERSITY) |
| INSTR. SIZE (M) |
26 |
| SEARCH FREQ. (MHz) |
1420.405 200 KHz IN HELIOCENTRIC, LSR AND COSMIC BACKGROUND REST FRAMES |
| FREQ. RES. (Hz) |
0.05" |
| OBJECTS |
SKY POSITION CORRESPONDING TO OSUROs 1977 WOW SIGNAL |
| FLUX LIMITS (W/m
2
) |
1.5 x 10
-24
W/m
2
PER CHANNEL |
| TOTAL HOURS |
16 |
| REFERENCE |
51 |
| COMMENTS |
Used META SETI system (see Ref.27) to track position on sky that produced the WOW signal at OSURO in 1977. |
|
| DATE |
1987 |
| OBSERVER(S) |
TARTER, KARDASHEV & DLYSH |
| SITE |
VLA |
| INSTR. SIZE (M) |
26 (9 ANTENNAS) |
| SEARCH FREQ. (MHz) |
1612.231 |
| FREQ. RES. (Hz) |
6105 |
| OBJECTS |
G357.3-1.3 |
| FLUX LIMITS (W/m
2
) |
|
| TOTAL HOURS |
1 |
| REFERENCE |
|
| COMMENTS |
Remote observation (by VLA staff) of IRAS source near galactic center to
determine if source could be nearby Dyson sphere. Source confirmed as OH/IR
star. |
|
| DATE |
1988 |
| OBSERVER(S) |
BANIA & ROOD |
| SITE |
NRAO |
| INSTR. SIZE (M) |
43 |
| SEARCH FREQ. (MHz) |
8665 |
| FREQ. RES. (Hz) |
≥305 |
| OBJECTS |
24 "VEGA-LIKE" STARS WITH 60 MICRON EXCESSSES (IRAS) |
| FLUX LIMITS (W/m
2
) |
1 Jy |
| TOTAL HOURS |
50 |
| REFERENCE |
46 |
| COMMENTS |
Searching for narrow band, obviously artificial, signal at the frequency of 3He+
spin-flip, being radiated by advanced civilizations that have colonized their
planetary systems. |
|
| DATE |
1989- ON |
| OBSERVER(S) |
CHILDERS & DIXON |
| SITE |
OSURO |
| INSTR. SIZE (M) |
53 |
| SEARCH FREQ. (MHz) |
1400 - 1700 |
| FREQ. RES. (Hz) |
100, 10 AND 2 kHz |
| OBJECTS |
ALL SKY SEARCH |
| FLUX LIMITS (W/m
2
) |
1.5 x 10-22 |
| TOTAL HOURS |
60,000 |
| REFERENCE |
|
| COMMENTS |
Have searched declinations +62 to -22 so far. Continuing to -36. |
|