UPPER LIMITS TO SOFT-X-RAY EMISSION OF SOURCES IN VIRGO

[1] ROCKET OBSERVATIONS OF VIRGO XR-1 [J]. NATURE, 1969, 222 (5195) : 757 - &

[2] EVIDENCE FOR X-RADIATION FROM RADIO GALAXY M87 [J]. ASTROPHYSICAL JOURNAL, 1967, 150 (3P2) : L199 - &

[3] BROWN R, 1970, PHYS REVIEW D, V223, P573

[4] VARIABILITY OF X-RAY EMISSION FROM M87 [J]. NATURE, 1971, 229 (5286) : 544 - &

[5] X-RAY STRUCTURE OF CYGNUS LOOP [J]. SCIENCE, 1971, 172 (3981) : 369 - +

[6] ROCKET PAYLOAD USING FOCUSING X-RAY OPTICS FOR OBSERVATION OF SOFT COSMIC X-RAYS [J]. NUCLEAR INSTRUMENTS & METHODS, 1971, 91 (03): : 451 - +

[7] GRAYZECK EJ, 1971, PRIVATE COMMUNICATIO

[8] ESTIMATED DISTANCE TO CYGNUS X-1 BASED ON ITS LOW-ENERGY X-RAY SPECTRUM [J]. ASTROPHYSICAL JOURNAL, 1971, 167 (01) : L15 - +

[9] VARIABILITY IN X-RAY FLUX FROM M87 [J]. NATURE-PHYSICAL SCIENCE, 1971, 230 (17): : 188 - &

[10] X-RAY OBSERVATIONS OF VIRGO CLUSTER, NGC-5128, AND 3C-273 FROM UHURU SATELLITE [J]. ASTROPHYSICAL JOURNAL, 1971, 165 (02) : L49 - +

[1] ROCKET OBSERVATIONS OF VIRGO XR-1 [J]. NATURE, 1969, 222 (5195) : 757 - &

[2] EVIDENCE FOR X-RADIATION FROM RADIO GALAXY M87 [J]. ASTROPHYSICAL JOURNAL, 1967, 150 (3P2) : L199 - &

[3] BROWN R, 1970, PHYS REVIEW D, V223, P573

[4] VARIABILITY OF X-RAY EMISSION FROM M87 [J]. NATURE, 1971, 229 (5286) : 544 - &

[5] X-RAY STRUCTURE OF CYGNUS LOOP [J]. SCIENCE, 1971, 172 (3981) : 369 - +

[6] ROCKET PAYLOAD USING FOCUSING X-RAY OPTICS FOR OBSERVATION OF SOFT COSMIC X-RAYS [J]. NUCLEAR INSTRUMENTS & METHODS, 1971, 91 (03): : 451 - +

[7] GRAYZECK EJ, 1971, PRIVATE COMMUNICATIO

[8] ESTIMATED DISTANCE TO CYGNUS X-1 BASED ON ITS LOW-ENERGY X-RAY SPECTRUM [J]. ASTROPHYSICAL JOURNAL, 1971, 167 (01) : L15 - +

[9] VARIABILITY IN X-RAY FLUX FROM M87 [J]. NATURE-PHYSICAL SCIENCE, 1971, 230 (17): : 188 - &

[10] X-RAY OBSERVATIONS OF VIRGO CLUSTER, NGC-5128, AND 3C-273 FROM UHURU SATELLITE [J]. ASTROPHYSICAL JOURNAL, 1971, 165 (02) : L49 - +