SETI - List of Searches

NOTES:

  • DATE: 1960
    OBSERVER(S): DRAKE "OZMA"
    SITE: NRAO
    INSTR. SIZE (M): 26
    SEARCH FREQ.(MHz): 1420-1420.4
    FREQUENCY RESOL.(Hz): 100
    OBJECTS: 2 STARS
    FLUX LIMITS (W/m**2): 4x10**-22 **
    TOTAL HOURS: 150
    REFERENCE: 1
    COMMENTS: Single channel receiver.

  • DATE: 1964-65
    OBSERVER(S): KARDASHEV & SHOLOMITSKII
    SITE: CRIMEA DEEP SPACE STATION
    INSTR. SIZE (M): 16 (8 ANTENNAS)
    SEARCH FREQ.(MHz): 923
    FREQUENCY RESOL.(Hz): 10 MHz
    OBJECTS: 2 QUASARS
    FLUX LIMITS (W/m**2): 2x10**-20
    TOTAL HOURS: 80
    REFERENCE: 20, 44
    COMMENTS: Reported detection of CTA102 as possible Type III civilization.

  • DATE: 1966
    OBSERVER(S): KELLERMAN
    SITE: CSIRO
    INSTR. SIZE (M): 64
    SEARCH FREQ.(MHz): MANY BETWEEN 350 & 5000
    FREQUENCY RESOL.(Hz): FULL BANDWIDTH FOR EACH FEED
    OBJECTS: 1 GALAXY (1934-63)
    FLUX LIMITS (W/m**2): 10**-18
    TOTAL HOURS:
    REFERENCE: 2
    COMMENTS: No "notch" of ETI origin was detected in galaxy 1934-63.

  • DATE: 1968 & 1969
    OBSERVER(S): TROITSKII,GERSHTEJIN,STARODUBTSEV & RAKHLIN
    SITE: ZIMENKIE, USSR
    INSTR. SIZE (M): 5
    SEARCH FREQ. (MHz): 926-928 & 1421-1423
    FREQUENCY RESOL. (Hz): 13
    OBJECTS: 11 STARS + M31
    FLUX LIMITS (W/m**2): 2x10**-21**
    TOTAL HOURS: 12
    REFERENCE: 3
    COMMENTS: 20 filters of width 100 KHz divided into 25 channels with F = 13 Hz spaced 4 KHz apart and stepped in frequency.

  • DATE: 1968 - 1982
    OBSERVER(S): TROITSKII
    SITE: GORKY
    INSTR. SIZE (M): DIPOLE
    SEARCH FREQ.(MHz): 30 CM, 16 CM, 8 CM and 3 CM
    FREQUENCY RESOL.(Hz):
    OBJECTS: ALL SKY SEARCH
    FLUX LIMITS (W/m**2):
    TOTAL HOURS: CONTINUING
    REFERENCE: 24
    COMMENTS: Search over all sky visible by single dipole.

  • DATE: 1969 - 1983
    OBSERVER(S): TROITSKII, BONDAR, & STARODUBTSEV
    SITE: GORKII, CRIMEA, MURMANSK AND PRIMORSKIJ REGIONS
    INSTR. SIZE (M): DIPOLES
    SEARCH FREQ.(MHz): 1863 & 927 & 600
    FREQUENCY RESOL.(Hz):
    OBJECTS: ALL SKY SEARCH FOR SPORADIC PULSES
    FLUX LIMITS (W/m**2): 10**-22 W/m**2/Hz
    TOTAL HOURS: 1200 PER YEAR (ON AVERAGE)
    REFERENCE: 4
    COMMENTS: Network of isotropic detectors: cross correlation from 2 or 4 sites over 8000 km.

  • DATE: 1970 - 1972
    OBSERVER(S): SLYSH, PASHCHENKO, RUDNITSKII, & LEKHT
    SITE: NANCAY
    INSTR. SIZE (M): 40x240
    SEARCH FREQ.(MHz): 1667 & 1665
    FREQUENCY RESOL.(Hz): 4 kHz
    OBJECTS: 5 OH MASERS
    FLUX LIMITS (W/m**2):
    TOTAL HOURS: 2
    REFERENCE: 37, 38, 39
    COMMENTS: Searched for deviation from Gaussian Emission Statistics in 5 OH Maser sources that might indicate transmissions from another civilization.

  • DATE: 1970 - 1972
    OBSERVER(S): SLYSH
    SITE: NANCAY
    INSTR. SIZE (M): 40x240
    SEARCH FREQ.(MHz): 1667 & 1665
    FREQUENCY RESOL.(Hz): 4 kHz
    OBJECTS: 10 NEAREST STARS
    FLUX LIMITS (W/m**2):
    TOTAL HOURS:
    REFERENCE:
    COMMENTS: Looked for signals at OH frequency between observations of OH Masers.

  • DATE: 1971 & 1972
    OBSERVER(S): VERSCHUUR "OZPA"
    SITE: NRAO
    INSTR. SIZE (M): 91 & 43
    SEARCH FREQ.(MHz): 1419.8-1421 & 1410-1430
    FREQUENCY RESOL.(Hz): 490 & 6900
    OBJECTS: 9 STARS
    FLUX LIMITS (W/m**2): 5x10**-24 & 2x10**-23
    TOTAL HOURS: 13
    REFERENCE: 5
    COMMENTS: 384 channel correlator on-line.

  • DATE: 1972 - 1974
    OBSERVER(S): KARDASHEV, GINDILIS, POPOV, SOGLASNOV, SPANGENBERG, STEINBERG ET AL.
    SITE: CAUCASUS, PAMIR, KAMCHATKA, MARS 7 SPACECRAFT
    INSTR. SIZE (M): 38, 60
    SEARCH FREQ.(MHz): 371, 408, 458, 535
    FREQUENCY RESOL.(Hz): 5 MHz
    OBJECTS: OMNI-DIRECTIONAL
    FLUX LIMITS (W/m**2): 2x10**-16 to 7x10**-15
    TOTAL HOURS: 150
    REFERENCE: 44
    COMMENTS: "Eavesdropping" search for pulses. Synchronous dispersion reception.

  • DATE: 1972
    OBSERVER(S): KARDASHEV, POPOV, SOGLASNOV ET AL.
    SITE: CRIMEA, RT-22
    INSTR. SIZE (M): 22
    SEARCH FREQ.(MHz): 8570 MHz
    FREQUENCY RESOL.(Hz):
    OBJECTS: GALACTIC CENTER
    FLUX LIMITS (W/m**2):
    TOTAL HOURS:
    REFERENCE: 44
    COMMENTS: Looked for statistical anomolies in continuum emission from galactic center.

  • DATE: 1972 - 1976
    OBSERVER(S): PALMER & ZUCKERMAN "OZMA II"
    SITE: NRAO
    INSTR. SIZE (M): 91
    SEARCH FREQ.(MHz): 1413-1425 & 1420.1-1420.7
    FREQUENCY RESOL.(Hz): 6.4x104 & 4,000
    OBJECTS: 674 STARS
    FLUX LIMITS (W/m**2): 10**-23 **
    TOTAL HOURS: 500
    REFERENCE: 6
    COMMENTS: 384 channel correlator on-line.

  • DATE: 1973 & On
    OBSERVER(S): DIXON, EHMAN, RAUB & KRAUS
    SITE: OSURO
    INSTR. SIZE (M): 53
    SEARCH FREQ.(MHz): 1420.4 REL.TO GAL.CEN. +/- 250 kHz
    FREQUENCY RESOL.(Hz): 10 & 1 kHz
    OBJECTS: ALL SKY SEARCH
    FLUX LIMITS (W/m**2): 1.5x10**-21 **
    TOTAL HOURS: CONTINUING
    REFERENCE: 8
    COMMENTS: Receiver is tuned to hydrogen rest frequency relative to Galactic Center (as a function of direction).

  • DATE: 1972 - 1976
    OBSERVER(S): BRIDLE & FELDMAN "QUI APPELLE?"
    SITE: ARO
    INSTR. SIZE (M): 46
    SEARCH FREQ.(MHz): 22235.08 +/- 5 MHz
    FREQUENCY RESOL.(Hz): 3x10**4
    OBJECTS: 70 STARS
    FLUX LIMITS (W/m**2): 1x10**-22 **
    TOTAL HOURS: 140
    REFERENCE:
    COMMENTS: Seventy solar type stars within 45 light years have been observed to date.

  • DATE: 1974
    OBSERVER(S): WISHNIA
    SITE: "COPERNICUS SATELLITE"
    INSTR. SIZE (M): 1
    SEARCH FREQ.(MHz): 3x10**9
    FREQUENCY RESOL.(Hz):
    OBJECTS: 3 STARS
    FLUX LIMITS (W/m**2):
    TOTAL HOURS:
    REFERENCE: 9
    COMMENTS: Search for UV laser lines.

  • DATE: 1973 - 1974
    OBSERVER(S): SHVARTSMAN ET AL. "MANIA"
    SITE: SPECIAL ASTROPHYSICAL OBSERVATORY
    INSTR. SIZE (M): 0.6
    SEARCH FREQ.(MHz): 5500 Angstroms
    FREQUENCY RESOL.(Hz): D = 10**-6 Angstroms
    OBJECTS: 21 PECULIAR OBJECTS
    FLUX LIMITS (W/m**2):
    TOTAL HOURS:
    REFERENCE: 21
    COMMENTS: Optical search for short pulses of length 3x10**-7 to 300 seconds, & narrow laser lines. Prototype for later system on 6m telescope.

  • DATE: 1978 & On
    OBSERVER(S): SHVARTSMAN ET AL "MANIA"
    SITE: SPECIAL ASTROPHYSICAL OBSERVATORY
    INSTR. SIZE (M): 6
    SEARCH FREQ.(MHz): 5500 Angstroms
    FREQUENCY RESOL.(Hz): D = 10**-6 Angstroms
    OBJECTS: 93 OBJECTS
    FLUX LIMITS (W/m**2): < 3x10**-4 OF THE OPTICAL FLUX IS VARIABLE IN ANY OBJECT OBSERVED
    TOTAL HOURS: 250
    REFERENCE: 45
    COMMENTS: Have searched 30 Radio Objects with Continuous Optical Spectra to date, looking for optical pulses form potential Kardashev type II or III civilizations.

  • DATE: 1975 & 1976
    OBSERVER(S): DRAKE & SAGAN
    SITE: NAIC
    INSTR. SIZE (M): 305
    SEARCH FREQ.(MHz): 1420, 1667 & 2380 (B = 3 MHz)
    FREQUENCY RESOL.(Hz): 1,000
    OBJECTS: FOUR GALAXIES
    FLUX LIMITS (W/m**2): 3x10**-25 **
    TOTAL HOURS: 100
    REFERENCE: 10
    COMMENTS: Search for type II civilizations in local group galaxies.

  • DATE: 1975 - 1979
    OBSERVER(S): ISRAEL & DE RUITER
    SITE: WRST
    INSTR. SIZE (M): 1500 MAX BASELINE
    SEARCH FREQ.(MHz): 1415
    FREQUENCY RESOL.(Hz): 4x106
    OBJECTS: 50 STAR FIELDS
    FLUX LIMITS (W/m**2): 2x10**-23 **
    TOTAL HOURS: 400
    REFERENCE:
    COMMENTS: Searches of "cleaned" maps prepared for the WSRT background survey, looked for positional coincidence between residual signals & AGK2 stars.

  • DATE: 1976 - 1985
    OBSERVER(S): BOWYER ET AL. (U.C. BERKELEY) "SERENDIP"
    SITE: HCRO
    INSTR. SIZE (M): 26
    SEARCH FREQ.(MHz): 917-937, 1410-1430, 1602-1605, 1853-1873, 5GHz
    FREQUENCY RESOL.(Hz): 2x500
    OBJECTS: ALL SKY SURVEY
    FLUX LIMITS (W/m**2): 1.15x10**-22
    TOTAL HOURS:
    REFERENCE: 11
    COMMENTS: Automated survey parasitic to radio astronomical observations.

  • DATE: 1976
    OBSERVER(S): CLARK, BLACK, CUZZI & TARTER
    SITE: NRAO
    INSTR. SIZE (M): 43
    SEARCH FREQ.(MHz): 8522-8523
    FREQUENCY RESOL.(Hz): 5
    OBJECTS: 4 STARS
    FLUX LIMITS (W/m**2): 2x10**-24 **
    TOTAL HOURS: 7
    REFERENCE:
    COMMENTS: VLBI high speed tape recorder combined with software direct Fourier transformation to produce extreme frequency resolution (non-real time).

  • DATE: 1977
    OBSERVER(S): BLACK, CLARK, CUZZI & TARTER
    SITE: NRAO
    INSTR. SIZE (M): 91
    SEARCH FREQ.(MHz): 1665-1667 *
    FREQUENCY RESOL.(Hz): 5
    OBJECTS: 200 STARS
    FLUX LIMITS (W/m**2): 10**-24 **
    TOTAL HOURS: 100
    REFERENCE: 12
    COMMENTS: VLBI high speed tape recorder combined with software direct Fourier transformation to produce extreme frequency resolution (non-real time).

  • DATE: 1977
    OBSERVER(S): DRAKE & STULL
    SITE: NAIC
    INSTR. SIZE (M): 305
    SEARCH FREQ.(MHz): 1664-1668 *
    FREQUENCY RESOL.(Hz): 0.5
    OBJECTS: 6 STARS
    FLUX LIMITS (W/m**2): 10**-26 **
    TOTAL HOURS: 10
    REFERENCE: 13
    COMMENTS: High speed tape recorder combined with optical processor to produce extreme frequency resolution (non-real time).

  • DATE: 1977 & On
    OBSERVER(S): WIELEBINSKI & SEIRADAKIS
    SITE: MPIFR
    INSTR. SIZE (M): 100
    SEARCH FREQ.(MHz): 1420
    FREQUENCY RESOL.(Hz): 20,000,000
    OBJECTS: 3 STARS
    FLUX LIMITS (W/m**2): 4x10**-23
    TOTAL HOURS: 2
    REFERENCE:
    COMMENTS: Candidate stars are inserted into ongoing program which searches for pulsed signals with periods of 0.3 to 1.5 sec.

  • DATE: 1978
    OBSERVER(S): HOROWITZ
    SITE: NAIC
    INSTR. SIZE (M): 305
    SEARCH FREQ.(MHz): 1420 +/- 500 Hz
    FREQUENCY RESOL.(Hz): 0.015
    OBJECTS: 185 STARS
    FLUX LIMITS (W/m**2): 8x10**-28 **
    TOTAL HOURS: 80
    REFERENCE: 14, 26
    COMMENTS: Assumes that signal frequency was corrected at the source to arrive at rest in Heliocentric or barycentric laboratory frame.

  • DATE: 1978
    OBSERVER(S): COHEN, MALKAN & DICKEY
    SITE: NAIC, HRO, CSIRO
    INSTR. SIZE (M): 305, 36, 64
    SEARCH FREQ.(MHz): 1665 & 1667, 22235.08, 1612.231
    FREQUENCY RESOL.(Hz): 9500, 65000, 4500
    OBJECTS: 25 GLOBULAR CLUSTERS
    FLUX LIMITS (W/m**2): 1.8x10**-25, 1.1x10**-22, 1.5x10**-24 **
    TOTAL HOURS: 40, 20, 20
    REFERENCE: 15
    COMMENTS: Passive search for Type II & III civilizations using astronomical data originally observed to detect H2O & OH masers in globular clusters.

  • DATE: 1978
    OBSERVER(S): KNOWLES & SULLIVAN
    SITE: NAIC
    INSTR. SIZE (M): 305
    SEARCH FREQ.(MHz): 130-500 (SPOT)*
    FREQUENCY RESOL.(Hz): 1
    OBJECTS: 2 STARS
    FLUX LIMITS (W/m**2): 2x10**-24
    TOTAL HOURS: 5
    REFERENCE: 16
    COMMENTS: Attempted "eavesdropping" using MKI VLBI tapes as in Black, et al., 1977.

  • DATE: 1978
    OBSERVER(S): MAKOVETSKIJ, GINDILIS, ET AL.
    SITE: ZELENCHUKSKAYA, RATAN-600
    INSTR. SIZE (M): 7.4x450 (ONE SECTOR)
    SEARCH FREQ.(MHz):
    FREQUENCY RESOL.(Hz)
    OBJECTS: BARNARD'S STAR
    FLUX LIMITS (W/m**2):
    TOTAL HOURS: 6 DAYS
    REFERENCE: 40
    COMMENTS: In accordance with "Magic Time" prediction by Makovetskij for Barnard's Star and Nova Cygni 1975, signals were searched for in September, 1978.

  • DATE: 1979
    OBSERVER(S): COLE & EKERS
    SITE: CSIRO
    INSTR. SIZE (M): 64
    SEARCH FREQ.(MHz): 5000 +/- 5 MHz & +/- 1 MHz
    FREQUENCY RESOL.(Hz): 10**7 & 10**6
    OBJECTS: NEARBY F, G & K STARS
    FLUX LIMITS (W/m**2): 4x10**-18 **
    TOTAL HOURS: 50
    REFERENCE: 17
    COMMENTS: Simultaneous pulsed events in both 2 MHz & 10 MHz filters are sought in detectors having time resolution of 4 microseconds.

  • DATE: 1979
    OBSERVER(S): FREITAS & VALDES
    SITE: LEUSCHNER OBSERVATORY, UCB
    INSTR. SIZE (M): 0.76
    SEARCH FREQ.(MHz): 5500 Angstroms
    FREQUENCY RESOL.(Hz):
    OBJECTS: STABLE "HALO ORBITS" ABOUT L4 & L5 LIBRATION POINTS IN EARTH-MOON SYSTEM
    FLUX LIMITS (W/m**2): mv =< 14 (magnitude)
    TOTAL HOURS: 30
    REFERENCE: 18
    COMMENTS: Attempt to discover evidence of discrete objects (such as interstellar probes) in stable orbits about L4, L5 by study of 90 photographic plates.

  • DATE: 1978 - 1980
    OBSERVER(S): MICHAEL J. HARRIS
    SITE: INTERPLANETARY NETWORK DATA
    INSTR. SIZE (M): PIONEER VENUS & VENERA 11 & 12 SPACECRAFT
    SEARCH FREQ.(MHz): 20 keV - 1 MeV
    FREQUENCY RESOL.(Hz):
    OBJECTS: 54 GAMMA RAY BURST EVENTS
    FLUX LIMITS (W/m**2):
    TOTAL HOURS:
    REFERENCE: 46
    COMMENTS: Attempt to find 3 GRB events in a straight line, each having same velocity (from positron-electron annihilation line) that could indicate trajectory of an interstellar spacecraft.

  • DATE: 1979 - 1982
    OBSERVER(S): JPL, UCB "SERENDIP"
    SITE: DSS 14
    INSTR. SIZE (M): 64
    SEARCH FREQ.(MHz): S&X BAND (B=10 MHz)
    FREQUENCY RESOL.(Hz): 2x(500 Hz)
    OBJECTS: APPARENT POSITIONS OF NASA SPACECRAFT
    FLUX LIMITS (W/m**2): 8x10**-24 **
    TOTAL HOURS: 400
    REFERENCE: 11
    COMMENTS: Automated survey parasitic to spacecraft tracking operations using 512 channel auto-correlator & 100 channel correlator with micro-processor control.

  • DATE: 1979 - 1981
    OBSERVER(S): TARTER, CLARK, DUQUET & LESYNA
    SITE: NAIC
    INSTR. SIZE (M): 305
    SEARCH FREQ.(MHz): 1420.4 +/- 2 MHz & 1666 +/- 2 MHz *
    FREQUENCY RESOL.(Hz): 5 & 600
    OBJECTS: 200 STARS
    FLUX LIMITS (W/m**2): 10**-25 **
    TOTAL HOURS: 100
    REFERENCE: 22
    COMMENTS: Rapid 1-bit sampler & high speed tape recorder run in parallel with 1008 channel correlator. Software direct Fourier transformation as in Black, et al., 1977.

  • DATE: 1980
    OBSERVER(S): WITTEBORN
    SITE: NASA - U OF A, MT. LEMON
    INSTR. SIZE (M): 1.5
    SEARCH FREQ.(MHz): 8.5 microns - 13.5 microns
    FREQUENCY RESOL.(Hz): 1 micron
    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 to 1981
    OBSERVER(S): SUCHKIN, TOKAREV ET AL
    SITE: NIRFI, GORKII, GAISH, MOSCOW
    INSTR. SIZE (M):
    SEARCH FREQ.(MHz): 9.3 MHz PULSED RADAR
    FREQUENCY RESOL.(Hz): 1500
    OBJECTS: L4 & L5 LIBRATION POINTS OF EARTH-MOON SYSTEM
    FLUX LIMITS (W/m**2):
    TOTAL HOURS: 20
    REFERENCE: 31
    COMMENTS: Radar reflections sought from artifacts in parking orbits.

  • DATE: 1981
    OBSERVER(S): LORD & O'DEA
    SITE: UNIVERSITY OF MASSACHUSETTS
    INSTR. SIZE (M): 14
    SEARCH FREQ.(MHz): 115000
    FREQUENCY RESOL.(Hz): 20,000 125,000 4x10**8
    OBJECTS: NORTH GALACTIC ROTATION AXIS b >= 5 degrees
    FLUX LIMITS (W/m**2): 10**-21 **
    TOTAL HOURS: 50
    REFERENCE:
    COMMENTS: Search for signals near J=1-0 CO line frequency from a transmitter somewhere along the Galactic rotation axis.

  • DATE: 1981
    OBSERVER(S): ISRAEL & TARTER
    SITE: WRST
    INSTR. SIZE (M): 3000 MAX BASELINE
    SEARCH FREQ.(MHz): 1420
    FREQUENCY RESOL.(Hz): 4x10**6, 10x10**6
    OBJECTS: 85 STAR FIELDS
    FLUX LIMITS (W/m**2): 6x10**-22 to 6x10**-24
    TOTAL HOURS: 600
    REFERENCE: 19
    COMMENTS: Parasitic search similar to Israel & De Ruiter using "uncleaned" maps stored at Groningen & Leiden, & AGK3 catalog.

  • DATE: 1981 - 1988
    OBSERVER(S): BIRAUD & TARTER
    SITE: NANCAY
    INSTR. SIZE (M): 40x240
    SEARCH FREQ.(MHz): 1420.4 +/- 320 kHz, 1665-1667
    FREQUENCY RESOL.(Hz): 48.8
    OBJECTS: 343 STARS
    FLUX LIMITS (W/m**2): 10**-24
    TOTAL HOURS: ~600
    REFERENCE: 29
    COMMENTS: Eight level, 1024 channel auto-correlator, with stepped first LO to extend frequency coverage at 48 Hz resolution.

  • 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
    FREQUENCY RESOL.(Hz): 1200
    OBJECTS: GALACTIC CENTER
    FLUX LIMITS (W/m**2): 10**-24 **
    TOTAL HOURS: 4
    REFERENCE: 41
    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 Angstroms
    FREQUENCY RESOL.(Hz): 10 Angstroms
    OBJECTS: 3 STARS
    FLUX LIMITS (W/m**2):
    TOTAL HOURS: 0.2
    REFERENCE: 32
    COMMENTS: Search for enhanced stellar lines of praseodymium, neodymium, zirconium as evidence for dumping of nuclear wastes into stellar atmospheres.

  • DATE: 1981 - 1982
    OBSERVER(S): VALDES & FREITAS "SETA"
    SITE: KPNO
    INSTR. SIZE (M): 0.61
    SEARCH FREQ.(MHz): 5500 Angstroms
    FREQUENCY RESOL.(Hz):
    OBJECTS: EARTH-MOON L1 THROUGH L5, SUN-EARTH L1, L2
    FLUX LIMITS (W/m**2): 10 <= mv <= 19 (magnitude)
    TOTAL HOURS: 70
    REFERENCE: 23
    COMMENTS: Attempt to see discrete artifacts (>= few m in size) in stable orbits near Lagrange points. Studies 137 III aF photographic plates.

  • 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)
    FREQUENCY RESOL.(Hz): 0.03 (1-LINEAR) & 0.03 (2-CIRCULAR)
    OBJECTS: 250 STARS & 150 STARS
    FLUX LIMITS (W/m**2): 4x10**-26 ** & 6x10**-28 **
    TOTAL HOURS: 75
    REFERENCE: 26
    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
    FREQUENCY RESOL.(Hz): 185 MHz
    OBJECTS: GALACTIC CENTER MERIDIAN
    FLUX LIMITS (W/m**2): 10**-19 **
    TOTAL HOURS: 72
    REFERENCE: 42
    COMMENTS: Search for strongly polarized signals by mapping field 1/4'x25' along l = 0 .

  • DATE: 1983 - 1985
    OBSERVER(S): HOROWITZ "SENTINEL"
    SITE: OAK RIDGE (HARVARD UNIVERSITY)
    INSTR. SIZE (M): 26
    SEARCH FREQ.(MHz): 1420.40575 & 1667.3590
    FREQUENCY RESOL.(Hz): 0.03 DUAL CIRCULAR (B=2 kHz)
    OBJECTS: SKY SURVEY
    FLUX LIMITS (W/m**2): 5x10**-25
    TOTAL HOURS: CONTINUING
    REFERENCE: 26
    COMMENTS: "Suitcase SETI" as the backend of automated sky survey at 2 magic frequencies over a 3 year observing period.

  • DATE: 1983
    OBSERVER(S): DAMASHEK
    SITE: NRAO
    INSTR. SIZE (M): 92
    SEARCH FREQ.(MHz): 390 +/-8
    FREQUENCY RESOL.(Hz): 2x106
    OBJECTS: SKY SURVEY (PULSARS)
    FLUX LIMITS (W/m**2): 2x10**-22
    TOTAL HOURS: 700
    REFERENCE:
    COMMENTS: Sixteen MHz sampled at 60 Hz; 8 contiguous frequency channels. Search for single dispersed pulses & telemetry (bit stream) signals.

  • DATE: 1983
    OBSERVER(S): VALDES & FREITAS
    SITE: HCRO
    INSTR. SIZE (M): 26
    SEARCH FREQ.(MHz): 1516 +/- 2.5
    FREQUENCY RESOL.(Hz): 4.9 & 76 kHz
    OBJECTS: 80 STARS & 12 NEARBY STARS
    FLUX LIMITS (W/m**2): 3x10**-24 **
    TOTAL HOURS: 100
    REFERENCE: 30
    COMMENTS: Search for radioactive tritium line from nuclear fusion by another technology.

  • DATE: 1983 & On
    OBSERVER(S): GULKIS
    SITE: DSS 43
    INSTR. SIZE (M): 64
    SEARCH FREQ.(MHz): 8 GHz & 2380 +/- 5 MHz
    FREQUENCY RESOL.(Hz): 40 kHz
    OBJECTS: PARTIAL SOUTHERN SKY
    FLUX LIMITS (W/m**2): 2x10**-22**
    TOTAL HOURS: 800 & ON
    REFERENCE: 25
    COMMENTS: Sky survey of constant declination strips (3 from -28.9 to -34.3 by April '83) whenever antenna stowed.

  • DATE: 1983 - 1988
    OBSERVER(S): GRAY
    SITE: SMALL SETI OBSERVATORY
    INSTR. SIZE (M): 4
    SEARCH FREQ.(MHz): 1419.5 - 1421.5
    FREQUENCY RESOL.(Hz): 40 TO 1 Hz
    OBJECTS: SKY SURVEY & -27
    FLUX LIMITS (W/m**2): 1x10**-22 **
    TOTAL HOURS: CONTINUING
    REFERENCE: 43
    COMMENTS: Dedicated meridian transit search system constructed by amateurs, operated during evenings.

  • DATE: 1983 - 1984
    OBSERVER(S): CULLERS
    SITE: AMSETI
    INSTR. SIZE (M): 2
    SEARCH FREQ.(MHz): ~1420 & <1000
    FREQUENCY RESOL.(Hz):
    OBJECTS:
    FLUX LIMITS (W/m**2):
    TOTAL HOURS: CONTINUING
    REFERENCE:
    COMMENTS: Low noise GaAs FETS & micros with satellite TV dishes, by Silicon Valley Hams, with NASA Ames consultation.

  • DATE: 1983 - 1988
    OBSERVER(S): STEPHENS
    SITE: INTERSTELLAR ELECTRO-MAGNETICS INSTITUTE AT HAY RIVER, NWT
    INSTR. SIZE (M): TWO 18mx18m (28m EQUIVALENT)
    SEARCH FREQ.(MHz): 1415 - 1425
    FREQUENCY RESOL.(Hz): 30 kHz
    OBJECTS: NORTHERN SKY SURVEY
    FLUX LIMITS (W/m**2): Tsys~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 degrees to 45 degrees declination. Discontinued due to lack of funding.

  • DATE: 1984
    OBSERVER(S): SLYSH
    SITE: SATELLITE
    INSTR. SIZE (M): RADIOMETER
    SEARCH FREQ.(MHz): 37x10**3
    FREQUENCY RESOL.(Hz): 4x10**8
    OBJECTS: ALL SKY 3K BB
    FLUX LIMITS (W/m**2): T/T =< .01
    TOTAL HOURS: 6000
    REFERENCE: 27
    COMMENTS: Lack of fluctuations in 3K background radiation on angular scales of 10**-2 Strd. rules out optically thick Dyson spheres radiating more than 1 solar luminosity within 100 pc.

  • DATE: 1985 & On
    OBSERVER(S): HOROWITZ "META SETI"
    SITE: OAKRIDGE (HARVARD UNIVERSITY)
    INSTR. SIZE (M): 26
    SEARCH FREQ.(MHz): 1420.4 & 1665.4 & 1667.3 & 2840.8
    FREQUENCY RESOL.(Hz): .05
    OBJECTS: SKY SURVEY
    FLUX LIMITS (W/m**2): 1.3x10**-24
    TOTAL HOURS: CONTINUING
    REFERENCE: 28
    COMMENTS: Signal Processing Hardware from "SENTINEL" was replicated 128 times to produce 8.4x10**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, 3K Background).

  • DATE: 1985 & On
    OBSERVER(S): BOWYER, WERTHEIMER & LAMPTON "SERENDIP II"
    SITE: NRAO
    INSTR. SIZE (M): 92
    SEARCH FREQ.(MHz): 400 TO 3500
    FREQUENCY RESOL.(Hz): 1
    OBJECTS: SKY AREAS OBSERVED BY ASTRONOMERS
    FLUX LIMITS (W/m**2): 4x10**-24
    TOTAL HOURS: CONTINUING
    REFERENCE: 36
    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): MIRABEL
    SITE: NRAO
    INSTR. SIZE (M): 43
    SEARCH FREQ.(MHz): 4829.620 - 4829.776
    FREQUENCY RESOL.(Hz): 76
    OBJECTS: GALACTIC CENTER & 33 NEARBY STARS
    FLUX LIMITS (W/m**2): 6x10**-25 to 10**-24 **
    TOTAL HOURS: 144
    REFERENCE: 33
    COMMENTS: Search at H2CO frequency. Included star HD170493 located in front of dark "anti-maser" cloud.

  • DATE: 1986 & On
    OBSERVER(S): COLOMB, MARTIN & LEMARCHAND
    SITE: IAR
    INSTR. SIZE (M): 30
    SEARCH FREQ.(MHz): 1415.4057, 1425.4057, 1667
    FREQUENCY RESOL.(Hz): 2.5 kHz
    OBJECTS: 78 SOLAR TYPE STARS
    FLUX LIMITS (W/m**2): 5x10**-23 **
    TOTAL HOURS: 320
    REFERENCE: 34
    COMMENTS: Thirty four of seventy eight 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: 1986
    OBSERVER(S): ARKHIPOV
    SITE:
    INSTR. SIZE (M):
    SEARCH FREQ.(MHz): 408 MHz
    FREQUENCY RESOL.(Hz):
    OBJECTS: HD 21899, HD 100623, HD 187691 & HD 187923
    FLUX LIMITS (W/m**2):
    TOTAL HOURS:
    REFERENCE: 35
    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: 1987
    OBSERVER(S): TARTER, KARDASHEV & SLYSH
    SITE: VLA
    INSTR. SIZE (M): 26 (9 ANTENNAS)
    SEARCH FREQ.(MHz): 1612.231
    FREQUENCY RESOL.(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: 1987
    OBSERVER(S): ROBERT 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
    FREQUENCY RESOL.(Hz): 0.05"
    OBJECTS: SKY POSITION CORRESPONDING TO OSURO's 1977 "WOW" SIGNAL
    FLUX LIMITS (W/m**2): 1.5x10**-24 W/m**2 PER CHANNEL
    TOTAL HOURS: 16
    REFERENCE: 46
    COMMENTS: Used "META SETI" system (see Ref. 27) to track position on sky that produced the "WOW" signal at OSURO in 1977.

  • DATE: 1988
    OBSERVER(S): BANIA & ROOD
    SITE: NRAO
    INSTR. SIZE (M): 43
    SEARCH FREQ.(MHz): 8665
    FREQUENCY RESOL.(Hz): >= 305
    OBJECTS: 24 "VEGA-LIKE" STARS WITH 60 MICRON EXCESSES (IRAS)
    FLUX LIMITS (W/m**2): 1 Jy
    TOTAL HOURS: 50
    REFERENCE: 49
    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: 1990
    OBSERVER(S): DAVID BLAIR ET AL.
    SITE: CSIRO
    INSTR. SIZE (M): 64
    SEARCH FREQ.(MHz): 4462 MHz +/- 25 kHz
    FREQUENCY RESOL.(Hz): 100
    OBJECTS: 100 SOLAR-TYPE STARS VISIBLE ONLY FROM SOUTHERN HEMISPHERE
    FLUX LIMITS (W/m**2): 2 Jy
    TOTAL HOURS: 60
    REFERENCE: 48
    COMMENTS: Magic frequency search at pi times hydrogen line frequency. 1280 channels were arranged to sample three reference frames: solar barycenter, stellar barycenter and geocenter.

  • DATE: 1990 & On
    OBSERVER(S): BETZ
    SITE: MT. WILSON
    INSTR. SIZE (M): 1.65 M ELEMENT OF TOWNES IR INTERFEROMETER
    SEARCH FREQ.(MHz): 10 MICRONS
    FREQUENCY RESOL.(Hz): 3.5 MHz (35 m/s)
    OBJECTS: 100 NEARBY SOLAR-TYPE STARS
    FLUX LIMITS (W/m**2): 1 MW TRANSMITTER OUT TO 20 pc
    TOTAL HOURS: CONTINUING
    REFERENCE: 52
    COMMENTS: Search for IR beacons at CO2 laser frequency using narrowband acousto-optical spectrometer.

  • DATE: 1990 & On
    OBSERVER(S): COLOMB "META II"
    SITE: IAR
    INSTR. SIZE (M): 30
    SEARCH FREQ.(MHz): 1420.4
    FREQUENCY RESOL.(Hz): .05
    OBJECTS: SKY SURVEY OF SOUTHERN HEMISPHERE
    FLUX LIMITS (W/m**2):
    TOTAL HOURS: CONTINUING
    REFERENCE: 50
    COMMENTS: A duplicate of META system build by Argentinian engineers under the guidance Prof. Horowitz at Harvard and financed by the Planetary Society. Same search stragegy as META.

  • DATE: 1990
    OBSERVER(S): GRAY
    SITE: OAK RIDGE (HARVARD UNIVERSITY)
    INSTR. SIZE (M): 26
    SEARCH FREQ.(MHz): 1420.4 MHz RELATIVE TO GALACTIC STANDARD OF REST +/- 200 kHz
    FREQUENCY RESOL.(Hz): .05
    OBJECTS: M31 and M33
    FLUX LIMITS (W/m**2):
    TOTAL HOURS: 50
    REFERENCE: 51
    COMMENTS: Long integrations (5 hours per HPBW) on 10**11 stars at once, looking for low duty cycle signals.

  • DATE: 1993
    OBSERVER(S): STEFFES & DeBOER
    SITE: NRAO/TUCSON
    INSTR. SIZE (M): 12
    SEARCH FREQ. (MHz): 203x10**3
    FREQUENCY RESOL. (Hz): 32
    OBJECTS: 40 STARS + 3 LOCATIONS NEAR GALACTIC CENTER
    FLUX LIMITS (W/m**2): 2.3x10**-19
    TOTAL HOURS: 25
    REFERENCE: 52
    COMMENTS: No artificial signals detected near positronium line.

  • DATE: 1992-93
    OBSERVER(S): NASA "HRMS" TARGETED SEARCH
    SITE: ARECIBO, PR
    INSTR. SIZE (M): 305
    SEARCH FREQ. (MHz): 1300 to 2400
    FREQUENCY RESOL. (Hz): 1, 7, 28 simultaneously, dual circular polarization
    OBJECTS: 25 STARS
    FLUX LIMITS (W/m**2): 5x10**-24
    TOTAL HOURS: 200
    REFERENCE: 53
    COMMENTS: No detection of non-human technology.

  • DATE: 1992-93
    OBSERVER(S): NASA "HRMS" SKY SURVEY
    SITE: GOLDSTONE, CA
    INSTR. SIZE (M): 26, 34
    SEARCH FREQ. (MHz): 1700 and 8300 to 8700
    FREQUENCY RESOL. (Hz): 19 OBJECTS: 72 sky frames at X-band and 130 sky frames repeatedly mapping 3 Galactic Plane regions at L-band in sequential circular polarization
    FLUX LIMITS (W/m**2): 9.8x10**-23
    TOTAL HOURS: 1,386
    REFERENCE: 53
    COMMENTS: No detection of non-human technology.

  • DATE: 1992 & on
    OBSERVER(S): BOWYER, WERTHIMER & DONNELLY "SERENDIP III"
    SITE: ARECIBO
    INSTR. SIZE (M): 305
    SEARCH FREQ. (MHz): 424 - 436
    FREQUENCY RESOL. (Hz): 0.6
    OBJECTS: Survey of the sky visible from Arecibo
    FLUX LIMITS (W/m**2): 5x10**-25
    TOTAL HOURS: CONTINUING
    REFERENCE: 54
    COMMENTS: 4 million channels are under observation. Commensal search occurring at twice sidereal rate in backwards direction while radio astronomers track targets using the feeds and receivers on carriage house 1.

  • DATE: 1995
    OBSERVER(S): PROJECT PHOENIX
    SITE: ATNF/PARKES
    INSTR. SIZE (M): 64
    SEARCH FREQ. (MHz): 1200 - 3000
    FREQUENCY RESOL. (Hz): 1
    OBJECTS: 206 stars, 1200 - 1750 MHz; 105 stars, 1750 - 3000 MHz
    FLUX LIMITS (W/m**2): 1.32x10**-25 for half of 1750 - 3000 MHz observations;
    1.86 x 10**-25 for all other observations TOTAL HOURS: 2600
    REFERENCE: 55, 56
    COMMENTS: Immediate two-site, pseudo-interferometric follow-up observations of candidate signals. No detection of non-human technology.

  • DATE: 1995
    OBSERVER(S): GREY
    SITE: VLA
    INSTR. SIZE (M): 27 element array of 26-m antennas
    SEARCH FREQ. (MHz): 1420
    FREQUENCY RESOL. (Hz): 6104 (B=781 kHz), 381 (B=195 kHz)
    OBJECTS: OSU "WOW" locale
    FLUX LIMITS (W/m**2): 10, 100 mJy/beam/channel
    TOTAL HOURS: 4
    REFERENCE: 57,
    COMMENTS: Search of the OSU "WOW" locale with 4 arcsec synthesized beam.

  • DATE: 1995
    OBSERVER(S): MAUERSBERGER, WILSON, ROOD, BANIA, HEIN, and LINHART
    SITE: IRAM
    INSTR. SIZE (M): 30-m
    SEARCH FREQ. (MHz): 203,000
    FREQUENCY RESOL. (Hz): 9700
    OBJECTS: 17 stars and positions
    FLUX LIMITS (W/m**2):
    TOTAL HOURS: 4.5
    REFERENCE: 58,
    COMMENTS: Search at the spin-flip line of positronium.
    List compiled by Jill Tarter, SETI Institute

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