\documentstyle[oldlfont,supertabular]{article} \begin{document} \setcounter{table}{1} \begin{table*} \caption[]{\label{X} X-ray characteristics of ROSAT survey sources detected with ML $\geq$ 8 in the Cygnus test region. Entries are sorted by decreasing count rates} \end{table*} \scriptsize % \tablehead{\hline \tbsp Source &ROSAT &Right &Declination &\rqvd &Cnt rate & Error &Max &HR 1 &Error &HR 2 &Error \\[0.8ex] index &name &ascension & &(\arcsec) &(cts/s) & (cts/s) &lik. & & & & \\[0.8ex] \hline \tbsp} \tabletail{\hline \multicolumn{12}{l}{\sl Continued on next page}\\ \hline} \tablelasttail{\hline} \begin{supertabular}{cccccccrrrrr} 1&RX J2112.7+5006&21H12M44.20S& 50D06M16.9S&17.5&1.310&0.041&3643.6&-0.98& 0.01& 0.10& 0.93\\ 2&RX J2133.9+4535&21H33M58.78S& 45D35M33.5S&17.6&0.779&0.035&1297.3& 0.05& 0.05&-0.17& 0.07\\ 3&RX J2052.7+4639&20H52M43.71S& 46D39M41.2S&18.2&0.351&0.021& 863.4&-0.81& 0.06&-0.41& 0.38\\ 4&RX J2125.2+4942&21H25M12.37S& 49D42M21.6S&18.2&0.250&0.019& 422.2& 0.08& 0.09& 0.32& 0.11\\ 5&RX J2100.8+4530&21H00M48.01S& 45D30M09.1S&18.5&0.244&0.017& 425.1&--&--&--&--\\ [0.8ex] 6&RX J2106.0+5421&21H06M01.45S& 54D21M56.5S&22.5&0.140&0.017& 106.2&-0.05& 0.14&-0.23& 0.17\\ 7&RX J2104.1+4912&21H04M10.04S& 49D12M58.2S&17.9&0.139&0.014& 267.3& 0.14& 0.11&-0.14& 0.14\\ 8&RX J2130.8+4827&21H30M48.78S& 48D27M39.0S&19.3&0.136&0.015& 168.7& 0.04& 0.12& 0.17& 0.16\\ 9&RX J2120.9+4636&21H20M55.17S& 46D36M18.0S&19.0&0.114&0.013& 150.5& 0.31& 0.12& 0.07& 0.14\\ 10&RX J2124.7+4639&21H24M43.66S& 46D39M52.1S&19.2&0.113&0.013& 159.4& 0.14& 0.14&-0.13& 0.18\\[0.8ex] 11&RX J2117.3+5044&21H17M19.42S& 50D44M07.5S&23.9&0.109&0.013& 105.3&-1.00& 0.09&--&--\\ 12&RX J2135.9+4728&21H35M54.38S& 47D28M28.3S&18.8&0.101&0.012& 160.4& 0.87& 0.12& 0.76& 0.11\\ 13&RX J2102.6+4552&21H02M40.84S& 45D52M57.4S&19.7&0.095&0.011& 168.8&--&--&--&--\\ 14&RX J2123.1+4831&21H23M08.11S& 48D31M05.8S&21.1&0.077&0.011& 81.2&-0.43& 0.18&-0.40& 0.40\\ 15&RX J2055.3+5025&20H55M21.83S& 50D25M33.3S&21.8&0.070&0.012& 58.8&--&--&--&--\\ [0.8ex] 16&RX J2109.2+4810&21H09M17.12S& 48D10M11.3S&21.9&0.070&0.011& 68.3&-0.09& 0.21& 0.22& 0.35\\ 17&RX J2100.9+5103&21H00M59.30S& 51D03M18.5S&21.0&0.062&0.011& 51.8&-0.28& 0.16& 0.07& 0.27\\ 18&RX J2049.6+5119&20H49M37.35S& 51D19M10.0S&22.3&0.061&0.011& 46.4&--&--&--&--\\ 19&RX J2059.3+5303&20H59M20.66S& 53D03M11.7S&22.5&0.061&0.012& 38.8&-0.29& 0.22&-0.28& 0.35\\ 20&RX J2056.7+4940&20H56M42.63S& 49D40M09.6S&26.2&0.060&0.010& 61.7&--&--&--&--\\ [0.8ex] 21&RX J2123.1+5021&21H23M11.94S& 50D21M48.8S&22.7&0.059&0.010& 52.2& 0.13& 0.18&-0.52& 0.21\\ 22&RX J2107.8+4932&21H07M52.28S& 49D32M39.3S&23.4&0.049&0.009& 44.6& 0.21& 0.21&-0.09& 0.24\\ 23&RX J2100.1+4841&21H00M07.71S& 48D41M28.6S&25.7&0.048&0.009& 37.4&--&--&--&--\\ 24&RX J2104.7+5223&21H04M43.36S& 52D23M31.7S&25.2&0.048&0.011& 33.0& 0.47& 0.42&-0.11& 0.27\\ 25&RX J2044.6+4758&20H44M39.77S& 47D58M01.9S&21.0&0.048&0.009& 49.6& 0.09& 0.40& 0.93& 0.84\\[0.8ex] 26&RX J2107.3+5202&21H07M21.38S& 52D02M57.1S&22.4&0.047&0.010& 40.1&--&--&--&--\\ 27&RX J2052.3+4820&20H52M23.88S& 48D20M03.5S&21.4&0.045&0.009& 43.8&--&--&--&--\\ 28&RX J2118.4+4356&21H18M25.99S& 43D56M44.9S&19.8&0.045&0.009& 48.6& 1.00& 0.30&-0.43& 0.21\\ 29&RX J2109.3+5138&21H09M23.36S& 51D38M05.5S&27.7&0.041&0.009& 29.7&--&--&--&--\\ 30&RX J2120.4+4733&21H20M25.75S& 47D33M42.8S&24.5&0.040&0.008& 34.9&-0.52& 0.21&-0.57& 0.62\\[0.8ex] 31&RX J2104.2+5015&21H04M15.36S& 50D15M08.3S&57.5&0.038&0.008& 16.0&--&--&--&--\\ 32&RX J2057.3+4813&20H57M23.37S& 48D13M29.2S&23.1&0.037&0.008& 33.6&--&--&--&--\\ 33&RX J2119.0+5207&21H19M00.28S& 52D07M08.4S&22.5&0.036&0.009& 32.3& 0.13& 0.45&-0.26& 0.50\\ 34&RX J2117.8+5112&21H17M52.30S& 51D12M08.4S&29.1&0.035&0.008& 20.7& 0.16& 0.62& 0.34& 0.61\\ 35&RX J2133.3+4726&21H33M22.11S& 47D26M34.1S&22.3&0.035&0.008& 41.8& 0.96& 0.27& 0.62& 0.16\\ [0.8ex] 36&RX J2134.0+4525&21H34M04.12S& 45D25M25.3S&32.1&0.034&0.010& 16.0& 0.13& 0.23&-0.08& 0.32\\ 37&RX J2103.4+5021&21H03M25.45S& 50D21M10.1S&20.5&0.034&0.008& 35.0&-0.01& 0.28&-0.40& 0.36\\ 38&RX J2040.6+4859&20H40M38.46S& 48D59M56.6S&20.9&0.033&0.008& 38.4& 0.40& 0.94&-0.55& 0.91\\ 39&RX J2102.9+4854&21H02M59.58S& 48D54M42.4S&24.1&0.033&0.008& 24.1& 0.05& 0.23&-0.09& 0.34\\ 40&RX J2113.3+5140&21H13M23.70S& 51D40M06.5S&20.2&0.032&0.008& 42.9&--&--&--&--\\ [0.8ex] 41&RX J2123.5+4621&21H23M34.16S& 46D21M35.1S&23.3&0.032&0.008& 28.1& 0.45& 0.22& 0.08& 0.25\\ 42&RX J2100.9+4857&21H00M55.58S& 48D57M08.0S&26.3&0.032&0.008& 23.5&--&--&--&--\\ 43&RX J2130.1+4901&21H30M11.83S& 49D01M33.0S&22.2&0.032&0.008& 26.6&-0.09& 0.23&-0.62& 0.38\\ 44&RX J2054.1+4942&20H54M09.47S& 49D42M47.0S&31.5&0.032&0.009& 14.8&--&--&--&--\\ 45&RX J2116.6+4645&21H16M36.64S& 46D45M27.8S&21.3&0.032&0.008& 29.7& 0.03& 0.37&-0.84& 0.76\\[0.8ex] 46&RX J2110.2+5333&21H10M16.55S& 53D33M58.7S&24.2&0.031&0.010& 18.4&-0.29& 0.30&-0.03& 0.47\\ 47&RX J2125.3+4642&21H25M20.50S& 46D42M55.6S&25.9&0.031&0.008& 26.0&-0.35& 0.38& 0.32& 0.83\\ 48&RX J2118.5+5247&21H18M30.96S& 52D47M45.4S&27.6&0.030&0.008& 23.0&-0.20& 0.22&-0.06& 0.34\\ 49&RX J2128.7+4409&21H28M46.26S& 44D09M16.0S&41.1&0.029&0.009& 10.4& 0.77& 0.18&-0.10& 0.20\\ 50&RX J2121.7+5049&21H21M46.06S& 50D49M28.5S&26.5&0.029&0.008& 28.0& 0.10& 0.23& 0.07& 0.27\\ [0.8ex] 51&RX J2132.5+4849&21H32M33.83S& 48D49M41.3S&24.9&0.028&0.008& 19.7&-0.23& 0.48& 0.82& 0.90\\ 52&RX J2122.4+5023&21H22M29.15S& 50D23M47.1S&25.8&0.028&0.008& 22.2& 0.06& 0.23& 0.09& 0.29\\ 53&RX J2035.9+4900&20H35M57.61S& 49D00M40.1S&22.4&0.027&0.007& 22.5& 0.35& 0.26&-0.06& 0.25\\ 54&RX J2108.2+5313&21H08M17.65S& 53D13M33.9S&27.5&0.027&0.009& 15.2&--&--&--&--\\ 55&RX J2128.6+4653&21H28M40.44S& 46D53M55.3S&22.9&0.026&0.007& 21.7& 0.14& 0.39& 0.02& 0.54\\[0.8ex] 56&RX J2048.0+4903&20H48M03.92S& 49D03M08.1S&20.8&0.026&0.007& 27.5&--&--&--&--\\ 57&RX J2115.4+4437&21H15M25.18S& 44D37M24.6S&35.2&0.025&0.007& 20.7& 0.33& 0.22& 0.03& 0.25\\ 58&RX J2109.9+4809&21H09M55.86S& 48D09M20.1S&25.8&0.025&0.007& 16.1&--&--&--&--\\ 59&RX J2108.6+4927&21H08M37.97S& 49D27M34.3S&22.3&0.024&0.007& 22.9& 0.12& 0.40& 0.37& 0.48\\ 60&RX J2050.8+4743&20H50M48.56S& 47D43M54.7S&26.4&0.024&0.007& 21.0& 0.93& 0.27& 0.20& 0.25\\[0.8ex] 61&RX J2135.6+4523&21H35M41.85S& 45D23M11.5S&24.9&0.023&0.008& 10.6& 0.37& 0.25& 0.53& 0.29\\ 62&RX J2119.9+5227&21H19M54.30S& 52D27M36.4S&24.5&0.023&0.007& 23.4& 0.09& 0.40& 0.39& 0.38\\ 63&RX J2100.3+5219&21H00M19.66S& 52D19M04.9S&25.2&0.022&0.008& 19.0& 0.16& 0.28&-0.05& 0.28\\ 64&RX J2056.3+4817&20H56M23.14S& 48D17M22.5S&28.5&0.022&0.007& 13.5& 0.54& 0.27&-0.08& 0.24\\ 65&RX J2127.3+5121&21H27M19.87S& 51D21M56.2S&22.3&0.020&0.007& 21.1&-0.11& 0.37&-0.13& 0.49\\ [0.8ex] 66&RX J2041.9+4746&20H41M57.45S& 47D46M08.8S&43.5&0.020&0.007& 8.4&--&--&--&--\\ 67&RX J2126.3+4654&21H26M23.47S& 46D54M31.0S&32.8&0.020&0.007& 10.2&--&--&--&--\\ 68&RX J2055.8+5044&20H55M51.81S& 50D44M32.3S&28.0&0.019&0.007& 15.1&--&--&--&--\\ 69&RX J2117.5+5127&21H17M33.20S& 51D27M10.2S&23.8&0.019&0.007& 12.8&-0.52& 0.28&-0.71& 0.79\\ 70&RX J2057.7+4752&20H57M42.33S& 47D52M12.6S&28.6&0.018&0.006& 11.3&--&--&--&--\\ [0.8ex] 71&RX J2131.2+4533&21H31M17.47S& 45D33M14.4S&25.4&0.018&0.007& 9.3&--&--&--&--\\ 72&RX J2054.6+5120&20H54M41.48S& 51D20M38.7S&45.2&0.018&0.006& 12.0&--&--&--&--\\ 73&RX J2121.5+4317&21H21M35.61S& 43D17M29.4S&57.6&0.018&0.006& 8.2&--&--&--&--\\ 74&RX J2128.4+4900&21H28M24.79S& 49D00M39.3S&29.4&0.017&0.006& 10.5&--&--&--&--\\ 75&RX J2058.5+4836&20H58M31.16S& 48D36M01.5S&30.1&0.017&0.006& 10.7&--&--&--&--\\ [0.8ex] 76&RX J2130.0+4740&21H30M05.91S& 47D40M30.8S&24.9&0.017&0.006& 12.6&--&--&--&--\\ 77&RX J2106.2+4437&21H06M17.37S& 44D37M00.9S&21.2&0.017&0.006& 16.7& 0.01& 0.44& 0.21& 0.66\\ 78&RX J2128.5+4626&21H28M30.05S& 46D26M55.3S&32.4&0.017&0.007& 11.1&--&--&--&--\\ 79&RX J2117.7+5139&21H17M46.61S& 51D39M05.4S&24.3&0.017&0.006& 23.3& 0.30& 0.34& 0.75& 0.26\\ 80&RX J2101.6+4730&21H01M40.31S& 47D30M21.3S&26.5&0.017&0.006& 10.1&--&--&--&--\\ [0.8ex] 81&RX J2046.7+4728&20H46M45.18S& 47D28M34.7S&34.1&0.017&0.006& 9.2&--&--&--&--\\ 82&RX J2136.6+4911&21H36M39.63S& 49D11M00.9S&23.5&0.017&0.006& 19.0&--&--&--&--\\ 83&RX J2118.6+5010&21H18M41.25S& 50D10M53.8S&24.9&0.017&0.005& 19.1& 0.74& 0.74& 0.12& 0.43\\ 84&RX J2130.3+4709&21H30M20.75S& 47D09M52.9S&26.1&0.016&0.006& 10.6&-0.14& 0.26&-0.26& 0.43\\ 85&RX J2116.0+4827&21H16M03.35S& 48D27M00.3S&33.4&0.016&0.006& 8.9&-0.60& 0.60&-0.74& 2.32\\[0.8ex] 86&RX J2124.7+4714&21H24M42.93S& 47D14M36.5S&24.6&0.016&0.006& 12.2&--&--&--&--\\ 87&RX J2117.5+4330&21H17M32.58S& 43D30M59.6S&33.3&0.016&0.006& 8.7&--&--&--&--\\ 88&RX J2137.6+4916&21H37M38.54S& 49D16M09.7S&26.3&0.016&0.005& 15.3&--&--&--&--\\ 89&RX J2100.6+5039&21H00M38.19S& 50D39M27.0S&29.4&0.016&0.006& 9.1&--&--&--&--\\ 90&RX J2110.5+4913&21H10M32.18S& 49D13M32.9S&29.5&0.016&0.006& 8.6&--&--&--&--\\ [0.8ex] 91&RX J2121.5+4732&21H21M30.99S& 47D32M52.1S&31.2&0.016&0.006& 8.4& 0.08& 0.24& 0.55& 0.27\\ 92&RX J2052.8+4723&20H52M53.05S& 47D23M34.6S&32.4&0.015&0.006& 8.0&--&--&--&--\\ 93&RX J2118.6+5039&21H18M40.10S& 50D39M06.4S&35.3&0.015&0.006& 8.3&--&--&--&--\\ 94&RX J2122.3+4730&21H22M20.15S& 47D30M45.4S&26.1&0.015&0.006& 10.4&-0.22& 0.28&-0.35& 0.48\\ 95&RX J2050.4+4913&20H50M27.45S& 49D13M16.2S&25.6&0.015&0.006& 9.3&--&--&--&--\\ [0.8ex] 96&RX J2113.0+4834&21H13M05.12S& 48D34M30.5S&29.0&0.015&0.006& 9.9& 0.28& 0.42&-0.07& 0.46\\ 97&RX J2134.2+4911&21H34M15.78S& 49D11M23.0S&21.7&0.015&0.005& 21.7&--&--&--&--\\ 98&RX J2119.5+4351&21H19M31.82S& 43D51M51.5S&36.7&0.014&0.006& 8.9&--&--&--&--\\ 99&RX J2117.4+5152&21H17M25.10S& 51D52M20.1S&30.8&0.014&0.005& 13.1&-0.10& 0.28& 0.72& 0.32\\ 100&RX J2123.2+5057&21H23M14.80S& 50D57M09.5S&40.6&0.014&0.005& 10.3&--&--&--&--\\ [0.8ex] 101&RX J2053.4+4759&20H53M28.87S& 47D59M14.3S&26.2&0.014&0.006& 9.0&--&--&--&--\\ 102&RX J2124.3+5059&21H24M18.31S& 50D59M52.4S&24.4&0.013&0.005& 17.3& 0.33& 0.29& 0.60& 0.23\\ 103&RX J2114.1+4840&21H14M09.88S& 48D40M27.9S&28.6&0.013&0.005& 14.4&--&--&--&--\\ 104&RX J2043.7+4727&20H43M44.64S& 47D27M11.9S&28.0&0.013&0.006& 8.8&--&--&--&--\\ 105&RX J2122.6+4956&21H22M40.00S& 49D56M04.0S&29.8&0.013&0.005& 11.7& 0.29& 0.46& 0.41& 0.43\\[0.8ex] 106&RX J2103.6+4845&21H03M39.94S& 48D45M41.1S&26.9&0.013&0.005& 9.7&--&--&--&--\\ 107&RX J2059.8+4937&20H59M48.59S& 49D37M34.6S&36.2&0.013&0.005& 8.8&--&--&--&--\\ 108&RX J2126.9+4636&21H26M58.87S& 46D36M43.9S&33.7&0.013&0.005& 8.1&--&--&--&--\\ 109&RX J2120.2+5127&21H20M17.48S& 51D27M46.7S&25.2&0.013&0.006& 12.1&--&--&--&--\\ 110&RX J2130.7+4919&21H30M44.80S& 49D19M19.2S&26.2&0.012&0.005& 11.7&-0.18& 0.35&-1.00& 0.70\\[0.8ex] 111&RX J2123.7+4636&21H23M44.89S& 46D36M59.4S&30.9&0.012&0.005& 8.7&--&--&--&--\\ 112&RX J2043.4+5002&20H43M27.86S& 50D02M33.9S&28.4&0.012&0.005& 8.2&--&--&--&--\\ 113&RX J2107.6+5048&21H07M38.56S& 50D48M51.5S&23.8&0.012&0.005& 12.9&--&--&--&--\\ 114&RX J2117.5+5243&21H17M31.42S& 52D43M09.5S&22.9&0.012&0.004& 18.3&--&--&--&--\\ 115&RX J2120.8+5209&21H20M49.63S& 52D09M27.7S&25.8&0.011&0.005& 12.3&--&--&--&--\\ [0.8ex] 116&RX J2121.8+5135&21H21M51.46S& 51D35M16.5S&27.9&0.010&0.005& 9.2&--&--&--&--\\ 117&RX J2121.0+5049&21H21M02.19S& 50D49M57.6S&28.9&0.010&0.004& 10.4&--&--&--&--\\ 118&RX J2058.1+4552&20H58M11.60S& 45D52M57.6S&24.4&0.010&0.005& 9.4&--&--&--&--\\ 119&RX J2112.9+5314&21H12M55.73S& 53D14M24.0S&34.5&0.010&0.005& 8.8&--&--&--&--\\ 120&RX J2122.6+4856&21H22M37.14S& 48D56M13.8S&30.1&0.009&0.004& 8.1&--&--&--&--\\ [0.8ex] 121&RX J2122.0+5059&21H22M02.40S& 50D59M18.7S&29.9&0.009&0.004& 9.0&--&--&--&--\\ 122&RX J2105.7+4933&21H05M45.89S& 49D33M36.5S&32.6&0.009&0.004& 8.0&--&--&--&--\\ 123&RX J2116.0+5254&21H16M03.91S& 52D54M56.1S&27.7&0.009&0.004& 8.3&--&--&--&--\\ 124&RX J2059.6+4731&20H59M40.20S& 47D31M11.8S&23.4&0.008&0.004& 8.4&--&--&--&--\\ 125&RX J2100.8+5213&21H00M52.03S& 52D13M58.1S&31.1&0.008&0.004& 8.9&--&--&--&--\\ [0.8ex] 126&RX J2111.8+4942&21H11M53.70S& 49D42M33.3S&25.9&0.008&0.004& 9.2&--&--&--&--\\ 127&RX J2108.9+4958&21H08M56.32S& 49D58M07.8S&30.8&0.008&0.004& 8.1&--&--&--&--\\ 128&RX J2122.9+4941&21H22M58.94S& 49D41M00.9S&23.7&0.006&0.003& 9.8&--&--&--&--\\ \end{supertabular} \newpage \begin{table*} \caption[]{\label{Xs} X-ray characteristics of ROSAT survey sources detected with 7 $\leq$ ML $<$ 8 in the Cygnus test region. Entries are sorted by decreasing count rates} \end{table*} \scriptsize % \tablehead{\hline \tbsp Source &ROSAT &Right &Declination &\rqvd &Cnt rate & Error &Max &HR 1 &Error &HR 2 &Error \\[0.8ex] index &name &Ascension & &(\arcsec) &(cts/s) & (cts/s) &lik. & & & & \\[0.8ex] \hline \tbsp} \tabletail{\hline \multicolumn{12}{l}{\sl Continued on next page}\\ \hline} \tablelasttail{\hline} \begin{supertabular}{cccccccrrrrr} 129&RX J2053.2+4951&20H53M17.01S& 49D51M25.9S&41.6&0.020&0.008& 7.9&--&--&--&--\\ 130&RX J2054.0+4858&20H54M00.97S& 48D58M49.6S&53.9&0.019&0.007& 7.7&--&--&--&--\\ 131&RX J2049.6+5128&20H49M39.60S& 51D28M26.6S&28.8&0.017&0.008& 7.3&--&--&--&--\\ 132&RX J2052.3+4843&20H52M21.56S& 48D43M24.4S&38.3&0.016&0.006& 7.1&--&--&--&--\\ 133&RX J2129.2+4604&21H29M15.28S& 46D04M45.2S&36.5&0.016&0.006& 7.9&--&--&--&--\\ [0.8ex] 134&RX J2124.5+5133&21H24M32.10S& 51D33M57.5S&33.6&0.015&0.006& 7.0&--&--&--&--\\ 135&RX J2117.2+5241&21H17M13.60S& 52D41M09.1S&32.4&0.014&0.006& 7.9&--&--&--&--\\ 136&RX J2057.6+4750&20H57M36.51S& 47D50M42.0S&25.3&0.013&0.006& 7.8&--&--&--&--\\ 137&RX J2111.6+4809&21H11M37.34S& 48D09M17.5S&33.5&0.013&0.005& 7.6&--&--&--&--\\ 138&RX J2051.8+4741&20H51M48.74S& 47D41M23.5S&34.4&0.013&0.005& 7.7&--&--&--&--\\ [0.8ex] 139&RX J2057.1+4929&20H57M06.24S& 49D29M33.5S&38.7&0.013&0.005& 7.9&--&--&--&--\\ 140&RX J2043.1+4752&20H43M07.49S& 47D52M04.0S&27.6&0.013&0.005& 7.4&--&--&--&--\\ 141&RX J2127.1+4801&21H27M08.86S& 48D01M20.9S&27.9&0.012&0.005& 7.5&--&--&--&--\\ 142&RX J2048.8+4631&20H48M48.64S& 46D31M09.8S&29.5&0.012&0.005& 7.8&--&--&--&--\\ 143&RX J2110.5+5244&21H10M30.63S& 52D44M23.8S&45.5&0.011&0.005& 7.8&--&--&--&--\\ [0.8ex] 144&RX J2052.3+4656&20H52M19.45S& 46D56M39.3S&42.9&0.011&0.005& 7.5&--&--&--&--\\ 145&RX J2101.2+4609&21H01M12.09S& 46D09M01.4S&38.4&0.011&0.005& 7.7&--&--&--&--\\ 146&RX J2055.7+4815&20H55M42.91S& 48D15M49.7S&46.3&0.011&0.005& 7.3&--&--&--&--\\ 147&RX J2045.1+4805&20H45M10.04S& 48D05M07.7S&23.4&0.011&0.005& 8.0&--&--&--&--\\ 148&RX J2110.3+4832&21H10M19.49S& 48D32M31.1S&46.2&0.011&0.004& 7.5&--&--&--&--\\ [0.8ex] 149&RX J2131.2+4812&21H31M12.24S& 48D12M14.0S&24.6&0.010&0.005& 7.5&--&--&--&--\\ 150&RX J2058.7+4845&20H58M45.38S& 48D45M48.5S&30.7&0.010&0.004& 8.0&--&--&--&--\\ 151&RX J2100.3+4810&21H00M22.02S& 48D10M24.9S&34.2&0.010&0.004& 7.9&--&--&--&--\\ 152&RX J2130.8+4842&21H30M50.85S& 48D42M40.9S&28.6&0.009&0.004& 7.1&--&--&--&--\\ 153&RX J2052.6+4703&20H52M38.94S& 47D03M46.4S&26.6&0.009&0.004& 7.5&--&--&--&--\\ [0.8ex] 154&RX J2055.0+5039&20H55M01.34S& 50D39M32.4S&27.7&0.009&0.004& 7.4&--&--&--&--\\ 155&RX J2121.1+4907&21H21M07.66S& 49D07M37.5S&27.5&0.008&0.004& 7.2&--&--&--&--\\ 156&RX J2122.4+4709&21H22M24.16S& 47D09M17.9S&30.3&0.008&0.004& 7.3&--&--&--&--\\ 157&RX J2054.6+4903&20H54M40.01S& 49D03M34.3S&26.3&0.008&0.004& 7.8&--&--&--&--\\ 158&RX J2121.5+4951&21H21M34.26S& 49D51M33.6S&26.7&0.006&0.003& 7.5&--&--&--&--\\ \end{supertabular} \newpage \begin{table*} \caption[]{\label{o} Optical properties of all proposed optical counterparts in the Cygnus test region for sources with ML $\geq$ 8. The last column lists the distance between X-ray an optical position in units of the 90\% confidence radius. For the sake of completeness, we also list the proposed counterparts having a probability of identification in the range 95\% - 98\%. These more uncertain cases are marked by a '?' as first letter of the identification name and the class acronym is followed by a '?'} \end{table*} \scriptsize \tablehead{\hline \tbsp Source &ROSAT &Class &Identification &Spectral &V &B-V &RA &DEC &D$_{\rm X-Opt}$ \\[0.8ex] index &name & & &type & & &(optical) &(optical) &(\rqvd) \\ [0.8ex] \hline \tbsp} \tabletail{\hline \multicolumn{10}{l}{\sl Continued on next page}\\ \hline} \tablelasttail{\hline} %\begin{supertabular}{cclllrrllr} \tabcolsep=4pt \begin{supertabular}{ccl p{3.3cm} lrrccr} 1&RX J2112.7+5006&WD &GD 394 &DAw &13.09&-0.24&21H12M43.50S&50D06M17.0S & .38\\ 2&RX J2133.9+4535&AC &HR 8252 &G8III & 4.00& 0.88&21H33M58.87S&45D35M35.3S & .12\\ 3&RX J2052.7+4639&WD &C &DO &17.50& --&20H52M43.87S&46D39M35.2S & .35\\ 4&RX J2125.2+4942&AC &A =GSC-0359801594 &K4V &10.95& --&21H25M12.11S&49D42M20.3S & .15\\ 5&RX J2100.8+4530&AC &SAO 50350 &G3V & 8.82& 0.72&21H00M46.72S&45D30M09.6S & .73\\ [0.8ex] 6&RX J2106.0+5421&AC &HD 235440 &F8V & 9.20& 0.70&21H06M00.57S&54D21M51.0S & .42\\ 7&RX J2104.1+4912&AC &B &M4e &16.00& --&21H04M10.64S&49D12M47.5S & .69\\ 8&RX J2130.8+4827&AC &SAO 50961 &G3V & 8.54& 0.74&21H30M47.88S&48D27M33.0S & .56\\ 9&RX J2120.9+4636&AC &A =GSC-0358903858 &F9V & 9.73& --&21H20M55.39S&46D36M13.0S & .29\\ 10&RX J2124.7+4639&AC &A+B &K3+K7V&10.59& --&21H24M43.75S&46D39M42.2S & .52\\ [0.8ex] 11&RX J2117.3+5044&WD &B =LAN 121 &DA &13.39& --&21H17M17.72S&50D44M06.0S & .67\\ 12&RX J2135.9+4728&AGN&B &Seyf 1&16.30& --&21H35M53.97S&47D28M20.9S & .45\\ 13&RX J2102.6+4552&AC &HD 200560 &K3V & 7.68& 0.97&21H02M38.67S&45D52M58.4S &1.14\\ 14&RX J2123.1+4831&AC &HD 203839 &F0V & 7.80& 0.40&21H23M07.70S&48D31M09.3S & .25\\ 15&RX J2055.3+5025&AC &A =GSC-0358301038 &G0V & 9.58& --&20H55M23.35S&50D25M36.4S & .69\\ [0.8ex] 16&RX J2109.2+4810&AC &A =GSC-0359205781 &K7V &11.40& --&21H09M17.84S&48D10M12.8S & .34\\ 17&RX J2100.9+5103&AC &A =G 231 -24 &M2Ve &14.80& --&21H00M59.62S&51D03M15.0S & .23\\ 18&RX J2049.6+5119&AC &HD 198638 &F2V & 6.70& 0.50&20H49M36.46S&51D18M54.2S & .80\\ 19&RX J2059.3+5303&AC &A =GSC-0395201062 &M3.5Ve&14.10& --&20H59M20.09S&53D03M04.9S & .37\\ 20&RX J2056.7+4940&AC &SAO 50269 &A7V & 9.90& 0.10&20H56M41.86S&49D40M17.8S & .42\\ [0.8ex] 21&RX J2123.1+5021&AC &A =BD+49 3512 &G0V & 9.56& --&21H23M12.30S&50D21M47.2S & .17\\ 22&RX J2107.8+4932&AC &A =GSC-0359600261 &G8V &10.66& --&21H07M52.88S&49D32M29.2S & .50\\ 23&RX J2100.1+4841&AC &BD+48 3260 E &G9V &12.03& --&21H00M07.88S&48D41M29.6S & .08\\ 24&RX J2104.7+5223&AC &A =GSC-0360000513 &G2V &11.44& --&21H04M44.32S&52D23M25.8S & .42\\ 25&RX J2044.6+4758&AC &A =GSC-0357800872 & &11.43& --&20H44M37.95S&47D58M08.3S & .91\\ [0.8ex] 26&RX J2107.3+5202&AC &V1061 Cyg =HD 235444&F8V & 9.24& 0.55&21H07M20.33S&52D02M56.3S & .42\\ 27&RX J2052.3+4820&AC &A =GSC-0357901469 &G9V &11.64& --&20H52M23.08S&48D19M57.3S & .47\\ 28&RX J2118.4+4356&OB &HR 8154 &O8Ve & 5.01&-0.03&21H18M27.05S&43D56M45.8S & .59\\ 29&RX J2109.3+5138&AC &A =GSC-0360000175 &G3V & 9.66& --&21H09M22.23S&51D37M50.2S & .67\\ 30&RX J2120.4+4733&AC &HD 203418 &K4V & 8.30& 1.60&21H20M25.27S&47D33M35.0S & .37\\ [0.8ex] 31&RX J2104.2+5015&AC &A &K7e &15.00& --&N/A &N/A & --\\ 32&RX J2057.3+4813&AC &A =GSC-0357900338 &A2m &10.93& --&20H57M22.55S&48D13M31.5S & .36\\ 33&RX J2119.0+5207&AC &A =GSC-0360101235 &G1V &11.72& --&21H18M59.28S&52D07M03.3S & .46\\ 34&RX J2117.8+5112&AC &HD 203028 &A2V & 8.36& 0.23&21H17M52.51S&51D12M25.7S & .60\\ 35&RX J2133.3+4726&?? & & &--&--& & &--\\ [0.8ex] 36&RX J2134.0+4525&AC &A =GSC-0359101945 &G3V &11.07& --&21H34M05.47S&45D25M33.6S & .52\\ 37&RX J2103.4+5021&AC &HR 8072 &K0III & 6.37& 0.98&21H03M25.63S&50D21M04.7S & .28\\ 38&RX J2040.6+4859&AC &SAO 49928 &F9V & 9.70& 0.60&20H40M38.29S&48D59M59.6S & .16\\ 39&RX J2102.9+4854&AC &A =GSC-0359600374 &G3V &10.69& --&21H03M00.75S&48D54M28.1S & .77\\ 40&RX J2113.3+5140&AC &A &M4Ve &16.50& --&21H13M23.09S&51D40M02.4S & .34\\ [0.8ex] 41&RX J2123.5+4621&AC &A =GSC-0359002325 &K4V &11.55& --&21H23M34.77S&46D21M40.3S & .35\\ 42&RX J2100.9+4857&AC &A =GSC-0359601318 &K2V &10.51& --&21H00M57.32S&48D56M46.7S &1.04\\ 43&RX J2130.1+4901&AC &B &M5Ve &14.11& 1.59&21H30M12.64S&49D01M25.7S & .49\\ 44&RX J2054.1+4942&AC &A =GSC-0358300309 &F8V &10.98& --&20H54M09.16S&49D42M41.4S & .20\\ 45&RX J2116.6+4645&AC &A &M5Ve &15.50& --&21H16M37.23S&46D45M16.2S & .62\\ [0.8ex] 46&RX J2110.2+5333&OB &HR 8106 &Ap & 5.61&-0.12&21H10M15.38S&53D33M47.5S & .63\\ 47&RX J2125.3+4642&AC &HR 8208 &F0V & 5.60& 0.35&21H25M18.57S&46D42M49.2S & .80\\ 48&RX J2118.5+5247&AC &A =GSC-0395301190 & &11.17& --&21H18M31.01S&52D47M40.8S & .17\\ 49&RX J2128.7+4409&?? & & &--&--& & &--\\ 50&RX J2121.7+5049&AC &HD 235498 &A0V &10.30& 0.20&21H21M47.33S&50D49M31.6S & .47\\ [0.8ex] 51&RX J2132.5+4849&?? & & &--&--& & &--\\ 52&RX J2122.4+5023&AC &A =GSC-0359700228 &G9V &11.55& --&21H22M26.82S&50D23M56.2S & .92\\ 53&RX J2035.9+4900&AC &A =GSC-0358101856 &G5-8V &10.97& --&20H35M57.27S&49D00M43.7S & .21\\ 54&RX J2108.2+5313&AC &HD 201543 &A0V & 7.30& 0.10&21H08M17.85S&53D13M31.1S & .12\\ 55&RX J2128.6+4653&AC &A =GSC-0359400075 &K5V &12.22& --&21H28M40.68S&46D53M56.7S & .13\\ [0.8ex] 56&RX J2048.0+4903&AC &A =GSC-0358200586 & &11.51& --&20H48M04.31S&49D03M12.5S & .28\\ 57&RX J2115.4+4437&AC &A =GSC-0318101403 &K0V &10.43& --&21H15M24.00S&44D37M42.4S & .62\\ 58&RX J2109.9+4809&AC &SAO 50523 &A5V & 9.10& 0.35&21H09M54.72S&48D09M17.2S & .45\\ 59&RX J2108.6+4927&AC &A &M2Ve &14.10& --&21H08M38.91S&49D27M32.4S & .43\\ 60&RX J2050.8+4743&?? & & &--&--& & &--\\ [0.8ex] 61&RX J2135.6+4523&AC &A =GSC-0359102803 &F9V &11.65& --&21H35M38.51S&45D23M10.6S &1.41\\ 62&RX J2119.9+5227&AC?&? A =GSC-0360101367 & &12.20& --&21H19M54.50S&52D27M46.7S & .43\\ 63&RX J2100.3+5219&AC &A =GSC-0360000514 &M1Ve &13.39& --&21H00M20.71S&52D19M10.6S & .45\\ 64&RX J2056.3+4817&?? & & &--&--& & &--\\ 65&RX J2127.3+5121&AC &A+B & &11.46& --&21H27M20.74S&51D22M03.1S & .48\\ [0.8ex] 66&RX J2041.9+4746&?? & & &--&--& & &--\\ 67&RX J2126.3+4654&AC &A =GSC-0359401755 & &10.62& --&21H26M23.54S&46D54M31.5S & .03\\ 68&RX J2055.8+5044&AC &A =GSC-0358700365 &G8V &12.99& --&20H55M53.12S&50D44M23.1S & .56\\ 69&RX J2117.5+5127&AC &A =GSC-0360100450 &M0Ve &12.90& --&21H17M32.20S&51D27M14.1S & .42\\ 70&RX J2057.7+4752&?? & & &--&--& & &--\\ [0.8ex] 71&RX J2131.2+4533&?? & & &--&--& & &--\\ 72&RX J2054.6+5120&?? & & &--&--& & &--\\ 73&RX J2121.5+4317&?? & & &--&--& & &--\\ 74&RX J2128.4+4900&?? & & &--&--& & &--\\ 75&RX J2058.5+4836&?? & & &--&--& & &--\\ [0.8ex] 76&RX J2130.0+4740&AC?&? A =Plat 2137 &K4V &11.98& 1.09&21H30M03.89S&47D40M25.4S & .84\\ 77&RX J2106.2+4437&AC &A &M5Ve &15.40& --&21H06M16.63S&44D37M03.8S & .39\\ 78&RX J2128.5+4626&?? & & &--&--& & &--\\ 79&RX J2117.7+5139&?? & & &--&--& & &--\\ 80&RX J2101.6+4730&AC &HD 200406 &G0V & 7.93& 0.54&21H01M38.16S&47D30M04.6S &1.03\\ [0.8ex] 81&RX J2046.7+4728&AC?&? A =GSC-0357800892 & &11.20& --&20H46M43.30S&47D28M33.3S & .56\\ 82&RX J2136.6+4911&?? & & &--&--& & &--\\ 83&RX J2118.6+5010&AC &HD 203136 &K0V & 7.76& 0.88&21H18M40.34S&50D10M57.0S & .37\\ 84&RX J2130.3+4709&CV &B &Me+DA & --& --&21H30M18.49S&47D10M07.6S &1.04\\ 85&RX J2116.0+4827&?? & & &--&--& & &--\\ [0.8ex] 86&RX J2124.7+4714&AC &A =GSC-0359402027 & &10.63& --&21H24M42.66S&47D14M42.5S & .26\\ 87&RX J2117.5+4330&AC &A =GSC-0318100914 &F8V &10.29& --&21H17M35.40S&43D30M52.1S & .95\\ 88&RX J2137.6+4916&?? & & &--&--& & &--\\ 89&RX J2100.6+5039&AC &A =GSC-0360000197 & &10.69& --&21H00M37.82S&50D39M29.4S & .14\\ 90&RX J2110.5+4913&AC &A =GSC-0359601415 & &10.49& --&21H10M32.49S&49D13M25.9S & .26\\[0.8ex] 91&RX J2121.5+4732&AC &A =GSC-0359303030 &M0Ve &12.84& --&21H21M32.55S&47D32M49.8S & .52\\ 92&RX J2052.8+4723&?? & & &--&--& & &--\\ 93&RX J2118.6+5039&?? & & &--&--& & &--\\ 94&RX J2122.3+4730&AC &A =GSC-0359305051 &M4.5Ve&13.50& --&21H22M20.75S&47D30M44.6S & .24\\ 95&RX J2050.4+4913&AC &A =GSC-0358300408 & &10.76& --&20H50M26.17S&49D13M25.4S & .60\\[0.8ex] 96&RX J2113.0+4834&AC &A =GSC-0359303505 &G1V &11.09& --&21H13M04.46S&48D34M23.4S & .33\\ 97&RX J2134.2+4911&AC?&? A =Plat 5991 &M2-M6 &12.62& 1.49&21H34M16.99S&49D11M21.4S & .56\\ 98&RX J2119.5+4351&?? & & &--&--& & &--\\ 99&RX J2117.4+5152&?? & & &--&--& & &--\\ 100&RX J2123.2+5057&?? & & &--&--& & &--\\ [0.8ex] 101&RX J2053.4+4759&?? & & &--&--& & &--\\ 102&RX J2124.3+5059&AC &A &K7Ve &13.30& --&21H24M17.95S&50D59M46.4S & .28\\ 103&RX J2114.1+4840&AC?&? A+B & &11.36& --&21H14M09.20S&48D40M53.0S & .90\\ 104&RX J2043.7+4727&AC?&? A =GSC-0357801789 & &11.70& --&20H43M47.00S&47D27M19.4S & .90\\ 105&RX J2122.6+4956&?? & & &--&--& & &--\\ [0.8ex] 106&RX J2103.6+4845&AC &A =GSC-0359600092 & &10.65& --&21H03M37.95S&48D45M40.6S & .73\\ 107&RX J2059.8+4937&AC?&? A =GSC-0358300546 & &12.58& --&20H59M50.22S&49D37M30.9S & .45\\ 108&RX J2126.9+4636&?? & & &--&--& & &--\\ 109&RX J2120.2+5127&AC &A =GSC-0360100440 & &11.08& --&21H20M17.38S&51D27M44.2S & .11\\ 110&RX J2130.7+4919&AC &A =Plat 2930 &F9 &12.44& 0.56&21H30M43.51S&49D18M59.7S & .88\\[0.8ex] 111&RX J2123.7+4636&?? & & &--&--& & &--\\ 112&RX J2043.4+5002&AC?&? A =GSC-0358200283 & &12.90& --&20H43M29.31S&50D02M13.3S & .88\\ 113&RX J2107.6+5048&AC &A =GSC-0360000137 &G1V &11.31& --&21H07M37.64S&50D48M60.0S & .51\\ 114&RX J2117.5+5243&AC?&? A =GSC-0395301075 & &12.62& --&21H17M31.78S&52D43M07.5S & .17\\ 115&RX J2120.8+5209&?? & & &--&--& & &--\\ [0.8ex] 116&RX J2121.8+5135&AC &A =GSC-0360100693 & &11.47& --&21H21M52.28S&51D35M18.0S & .29\\ 117&RX J2121.0+5049&?? & & &--&--& & &--\\ 118&RX J2058.1+4552&AC?&? A =GSC-0357501843 & &10.67& --&20H58M11.67S&45D52M49.1S & .35\\ 119&RX J2112.9+5314&AC &A =GSC-0395300355 & & 9.95& --&21H12M56.17S&53D14M31.1S & .24\\ 120&RX J2122.6+4856&AC?&? A =GSC-0359800927 & &11.37& --&21H22M37.38S&48D56M19.0S & .19\\[0.8ex] 121&RX J2122.0+5059&?? & & &--&--& & &--\\ 122&RX J2105.7+4933&?? & & &--&--& & &--\\ 123&RX J2116.0+5254&?? & & &--&--& & &--\\ 124&RX J2059.6+4731&AC?&? A =GSC-0357901518 & &12.47& --&20H59M40.43S&47D31M09.6S & .14\\ 125&RX J2100.8+5213&AC?&? A =GSC-0360000242 & &13.27& --&21H00M52.05S&52D13M58.8S & .03\\[0.8ex] 126&RX J2111.8+4942&?? & & &--&--& & &--\\ 127&RX J2108.9+4958&?? & & &--&--& & &--\\ 128&RX J2122.9+4941&?? & & &--&--& & &--\\ \end{supertabular} \tabcolsep=6pt \newpage \begin{table*} \caption[]{\label{os} Optical properties of all proposed optical counterparts in the Cygnus test region for sources with 7 $\leq$ ML $<$ 8. The last column lists the distance between X-ray an optical positions in units of the 90\% confidence radius. For the sake of completeness, we also list the proposed counterparts having a probability of identification in the range 95\% - 98\%. These more uncertain cases are marked by a '?' as first letter of the identification name and the class acronym is followed by a '?'} \end{table*} \scriptsize \tablehead{\hline \tbsp Source &ROSAT &Class &Identification &Spectral &V &B-V &RA &DEC &D$_{\rm X-Opt}$ \\[0.8ex] index &name & & &type & & &(optical) &(optical) &(\rqvd) \\ [0.8ex] \hline \tbsp} \tabletail{\hline \multicolumn{10}{l}{\sl Continued on next page}\\ \hline} \tablelasttail{\hline} %\begin{supertabular}{cclllrrllr} \tabcolsep=4pt \begin{supertabular}{ccl p{3.3cm} lrrccr} 129&RX J2053.2+4951&?? & & &--&--& & &--\\ 130&RX J2054.0+4858&?? & & &--&--& & &--\\ 131&RX J2049.6+5128&AC &A =GSC-0358700147 & &11.53& --&20H49M39.75S&51D28M34.1S & .26\\ 132&RX J2052.3+4843&AC &A =GSC-0357901214 & & 9.75& --&20H52M20.16S&48D43M26.5S & .36\\ 133&RX J2129.2+4604&?? & & &--&--& & &--\\ [0.8ex] 134&RX J2124.5+5133&?? & & &--&--& & &--\\ 135&RX J2117.2+5241&AC &A =GSC-0395301223 & &10.42& --&21H17M11.64S&52D40M41.8S &1.01\\ 136&RX J2057.6+4750&?? & & &--&--& & &--\\ 137&RX J2111.6+4809&CV &V1500 Cyg & &17.06& 0.38&21H11M36.60S&48D09M02.0S & .51\\ 138&RX J2051.8+4741&?? & & &--&--& & &--\\ [0.8ex] 139&RX J2057.1+4929&?? & & &--&--& & &--\\ 140&RX J2043.1+4752&AC?&? A =GSC-0357802133 & &11.42& --&20H43M08.36S&47D52M13.8S & .48\\ 141&RX J2127.1+4801&?? & & &--&--& & &--\\ 142&RX J2048.8+4631&?? & & &--&--& & &--\\ 143&RX J2110.5+5244&?? & & &--&--& & &--\\ [0.8ex] 144&RX J2052.3+4656&?? & & &--&--& & &--\\ 145&RX J2101.2+4609&OB &HD 200310 &B1Ve & 5.40&-0.18&21H01M10.80S&46D09M20.8S & .61\\ 146&RX J2055.7+4815&?? & & &--&--& & &--\\ 147&RX J2045.1+4805&AC &A =GSC-0357800263 & &11.37& --&20H45M10.39S&48D05M12.3S & .25\\ 148&RX J2110.3+4832&?? & & &--&--& & &--\\ [0.8ex] 149&RX J2131.2+4812&?? & & &--&--& & &--\\ 150&RX J2058.7+4845&?? & & &--&--& & &--\\ 151&RX J2100.3+4810&?? & & &--&--& & &--\\ 152&RX J2130.8+4842&?? & & &--&--& & &--\\ 153&RX J2052.6+4703&?? & & &--&--& & &--\\ [0.8ex] 154&RX J2055.0+5039&?? & & &--&--& & &--\\ 155&RX J2121.1+4907&?? & & &--&--& & &--\\ 156&RX J2122.4+4709&?? & & &--&--& & &--\\ 157&RX J2054.6+4903&?? & & &--&--& & &--\\ 158&RX J2121.5+4951&?? & & &--&--& & &--\\ \end{supertabular} \tabcolsep=6pt % ------------------------------ Table merging all notes to individual sources \newpage \normalsize \begin{table*} \caption[]{\label{notes} Notes on individual sources} \end{table*} \tablehead{\hline \tbsp Source &ROSAT & Note \\ index &name & \\ \hline \tbsp} \tabletail{\hline \multicolumn{3}{l}{\sl Continued on next page}\\ \hline} \tablelasttail{\hline} \begin{supertabular}{rc p{12cm} } 1 & RX J2112.7+5006 & GD 394 = RE J211241+500619 \\[0.8ex] 2 & RX J2133.9+4535 & HD 205435 = HR 8252 = $\rho$ Cyg \\[0.8ex] 6 & RX J2106.0+5421 & In ADS catalogue \\[0.8ex] 8 & RX J2130.8+4827 & Member of NGC 7092, in ADS catalogue \\[0.8ex] 10 & RX J2124.7+4639 & GSC-0359001727 merges objects A and B \\[0.8ex] 11 & RX J2117.3+5044 & Our candidate was independently discovered by Lanning, H.H. and Meakes, M. (1994; PASP, 106, 38) in a search for faint UV-bright stars in the galactic plane. A finding chart may be found in their work. \\[0.8ex] 12 & RX J2135.9+4728 & $z$ = 0.025 \\[0.8ex] 13 & RX J2102.6+4552 & Chromospheric activity in HD 200560 was reported by Soderblom (1985, AJ, 90, 2103). \\[0.8ex] 15 & RX J2055.3+5025 & On the basis of its position outside the 90\% \ confidence circle and weak Ca II H\&K emission, star B is unlikely to contribute much to the X-ray source. The finding chart was extracted from the STSCI digitized sky survey. \\[0.8ex] 23 & RX J2100.1+4841 & BD+48 3260 E = ADS 14531 E \\[0.8ex] 26 & RX J2107.3+5202 & This star is an eclipsing binary of the Algol type with an orbital period of 2.3467 days. \\[0.8ex] 30 & RX J2120.4+4733 & = ADS 14886 AB \\[0.8ex] 37 & RX J2103.4+5021 & Ca H\&K emission also visible in the high resolution spectrum of Strassmeier (1994, A\&AS, 103, 413). \\[0.8ex] 38 & RX J2040.6+4859 & = ADS 14161 A \\[0.8ex] 43 & RX J2130.1+4901 & Candidate object 'B' coincides in position with star 2376 in the catalogue of stars in the region of the open cluster M39 compiled by Platais (1994). This M5Ve star lies far off the photometric sequence defined by Mohan and Sagar (1985, MNRAS, 213, 337) for this cluster and we conclude that object 'B' is a foreground star not related to the open cluster. Object 'A' would deserve follow-up observations. \\[0.8ex] 51 & RX J2132.5+4849 & Candidates A and B are respectively stars 4522 and 4516 in the catalogue of stars in the region of the open cluster M39 compiled by Platais (1994). Our high and low resolution (not shown) spectra show that A is a G1 star and B is a K7 star. These spectral types are in agreement with the B-V indices listed in Platais (1994). Assuming that the two stars are on the main sequence implies a distance modulus incompatible with a membership to M39. Recent additional optical observations (not shown) indicate that the two brightest objects east of "B" (D and E not marked) are M stars with weak H$\alpha$ emission. The X-ray source could result from the combined coronal emission of several of the stars held in the error circle. \\[0.8ex] 53 & RX J2035.9+4900 & The medium resolution spectrum of object 'A', the proposed optical counterpart, exhibits clear line doubling revealing the presence of a close binary. \\[0.8ex] 58 & RX J2109.9+4809 & The UBV photometry reported by Young et al. (1976, ApJ, 209, 882) suggests a spectral type slightly later than A5 for SAO 50523. \\[0.8ex] 65 & RX J2127.3+5121 & Object A is GSC-0360200451 (V=11.92) and B is GSC-0360200459 (V=11.46). Optical coordinates and magnitudes recorded in Tables are those of B. \\[0.8ex] 68 & RX J2055.8+5044 & X-ray position compatible with IRAS 20544+5033 \\[0.8ex] 74 & RX J2128.4+4900 & Star A (V=13.75; B-V=0.57; U-B=0.45) is number 889 in the catalog of objects in the direction of M39 by Platais (1994). \\[0.8ex] 76 & RX J2130.0+4740 & Candidates A (V=11.98; B-V=1.09; U-B=0.68) and B (V=11.00; B-V=0.52; U-B=-0.10, spectral type F6) are respectively stars 2137 and 2189 in the catalog of objects in the region of M39 (Platais 1994). The colour indices of object A suggest a K4 spectral type with a distance modulus smaller than M39 whereas candidate B is likely to belong to the open cluster. \\[0.8ex] 92 & RX J2052.8+4723 & X-ray position compatible with IRAS 20512+4712. \\[0.8ex] 97 & RX J2134.2+4911 & Candidate A is number 5991 in the catalog of objects in the region of M39 (Platais 1994). Its red colours are compatible with A being a nearby M2-M6 star. Two other stars in Platais's list (5981 and 5999) fall inside the 90\% confidence radius. UBV photometry suggests that these two objects are G type stars located behind M39 and are therefore less likely optical counterparts of the X-ray source. \\[0.8ex] 103 & RX J2114.1+4840 & Object A is GSC-0359304712 (V=11.36) and Object B is GSC-0359304650 (V=13.61). The optical positions and magnitudes recorded in Tables are those of A. \\[0.8ex] 105 & RX J2122.6+4956 & X-ray position compatible with IRAS 21209+4943. \\[0.8ex] 108 & RX J2126.9+4636 & X-ray position compatible with IRAS 21252+4624 \\[0.8ex] 141 & RX J2127.1+4801 & A possible identification based on positional coincidence is star 173 in the catalogue of objects in the region of M39 (Platais 1994). \\[0.8ex] 149 & RX J2131.2+4812 & The GSC entry closest to the X-ray position is star 3359 in the catalogue of objects in the region of M39 (Platais 1994). Its colour suggests a G2-G5 type and a distance compatible with a membership to M39. \\[0.8ex] 152 & RX J2130.8+4842 & Star number 3016 of the catalog of objects in the region of M39 (Platais 1994) falls into the 90\% confidence error circle. The UBV photometry is consistent with a K2-K5 dwarf in M39. \\[0.8ex] %\input table_note.tex %\input table_notes.tex \end{supertabular} \end{document}