1995A&AS..114..109A

Query : 1995A&AS..114..109A

1995A&AS..114..109A - Astron. Astrophys., Suppl. Ser., 114, 109-134 (1995/November-2)

A study of the Chamaeleon star forming region from the ROSAT all-sky survey. I. X-ray observations and optical identifications.

ALCALA J.M., KRAUTTER J., SCHMITT J.H.M.M., COVINO E., WICHMANN R. and MUNDT R.

Abstract (from CDS):

We present the observations of the ROSAT all-sky survey (RASS) in the direction of the Chamaeleon cloud complex, as well as the spectroscopic identifications of the detected X-ray sources. The main purpose of this identification program was the search for low mass pre-main sequence stars. Sixteen previously known PMS stars were detected with high confidence by ROSAT. Eight are classical T Tauri stars and eight are weak-line T Tauri stars, Seventy-seven new weak-line T Tauri stars were identified on the basis of the presence of strong Li λ 6707 absorption, spectral type later than F0 and chromospheric emission. We give coordinates and count rates of the X-ray sources, and present optical spectra and finding charts for the sources identified optically as new pre-main sequence stars. Optical UBV(RI)c and near-infrared JHKLM photometry for this sample of stars is also provided. In addition, 6 new dKe-dMe candidates are found among the RASS sources.

Abstract Copyright: ∼

Journal keyword(s): X-ray: stars - stars: pre-main-sequence - ISM: Chamaeleon clouds - surveys

VizieR on-line data: <Available at CDS (J/A+AS/114/109): table6>

Nomenclature: Table 6: [AKS95b] RX JHHMM.m+DDMMa N=8

Simbad objects: 180

goto View the references in ADS

Number of rows : 180
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 HD 237475 TT* 06 18 21.2578193760 +57 27 04.878238104   10.05 9.19     G5 12 0
2 V* EG Cha Or* 08 36 56.2143359952 -78 56 45.633633000   11.82 10.457   9.010 K4Ve 110 0
3 RX J0840.5-7833 X 08 40 28.1 -78 33 16           ~ 1 0
4 ICRF J084127.0-754027 Sy1 08 41 27.0356601864 -75 40 27.874130880   18.03 18.9     ~ 61 1
5 RX J0842.4-8345 TT* 08 42 22.7684292048 -83 45 24.751973196     12.096   10.424 K7 17 0
6 RX J0842.7-7932 X 08 42 40.3 -79 32 08           ~ 1 0
7 V* EM Cha Or* 08 43 07.2443828304 -79 04 52.483961064     10.8     K6.0 64 0
8 V* EO Cha Or* 08 44 31.8938144088 -78 46 31.143275076     12.531   10.646 M0e 83 0
9 RX J0845.7-7406 X 08 45 40.0 -74 06 37           ~ 1 0
10 V* EQ Cha TT* 08 47 56.7585043512 -78 54 53.185560516   14.777 13.308 12.802 10.795 M3 88 0
11 CD-75 392 TT* 08 50 05.4486135048 -75 54 38.082436848   11.305 10.604 10.493 9.728 G9V 43 0
12 CPD-82 291 TT* 08 53 05.3105538408 -82 43 59.791519848   12.52 11.50     K4 16 0
13 RX J0856.7-7652 X 08 56 42.1 -76 52 17           ~ 1 0
14 QSO B0858-771 QSO 08 57 42.6266405304 -77 19 31.826043336   17.77 17.57     ~ 37 1
15 RX J0901.0-7715 TT* 09 00 59.5 -77 15 16           G5 3 0
16 RX J0902.9-7759 TT* 09 02 51.2713949520 -77 59 34.668343068   15.457 13.980 13.617   M3e 25 0
17 V* DO Cha SB* 09 07 47.1785737464 -82 19 29.663347980   8.15 7.680   7.042 F7V 51 0
18 RX J0914.8-7531 X 09 14 46.8 -75 31 12           ~ 1 0
19 [OKM2018] SWIFT J0913.5-7541 AG? 09 15 15.2133666048 -75 23 49.963149456           ~ 11 0
20 RX J0915.4-7608 Ro* 09 15 29.1294168312 -76 08 47.129815104     12.142   10.452 K7 24 0
21 2MASS J09171033-7744019 TT* 09 17 10.3487931504 -77 44 02.142022020   11.34 10.50 10.64   G2 15 0
22 RX J0918.4-7824 X 09 18 21.6 -78 24 36           ~ 1 0
23 HD 81485B SB* 09 19 23.9788595160 -77 38 45.104008632   10.43 9.56     K0IVe 24 0
24 RX J0925.6-8040 X 09 25 37.91 -80 40 34.4           ~ 2 0
25 RX J0927.4-7815 X 09 27 21.44 -78 15 34.6           ~ 1 0
26 HD 82879 TT* 09 28 21.1218832104 -78 15 35.367616224   9.43 8.99     F6/7IV/V 29 0
27 2MASS J09303643-7528543 AG? 09 30 36.4159281240 -75 28 54.284976516           ~ 3 0
28 RX J0933.2-7433 TT* 09 33 20.734680 -74 33 12.66228   17.090 15.500 15.227   M4e 7 0
29 HD 83979 * 09 33 53.3753648154 -80 56 28.528679937 4.4 4.919 5.059     B4IV 66 0
30 RX J0935.0-7804 TT* 09 34 55.8994070808 -78 04 19.246056996     13.87     M3 22 0
31 RX J0936.0-8019 X 09 36 02.32 -80 19 35.6           ~ 1 0
32 HD 84075 TT* 09 36 17.8234661352 -78 20 41.588588076   9.18 8.59     G2V 63 0
33 2MASS J09424962-7726407 TT* 09 42 49.6245150312 -77 26 40.827783840     13.48     M1 18 0
34 RX J0942.9-8214 X 09 42 56.4 -82 14 21           ~ 1 0
35 2MASX J09432407-7620101 Bz? 09 43 24.02882 -76 20 10.3613   19       ~ 57 1
36 1RXS J094321.3-761957 ClG 09 43 25.0 -76 19 57           ~ 8 0
37 6dFGS gJ094522.1-832729 AGN 09 45 22.1654032080 -83 27 28.739755944   18.43   17.57   ~ 5 0
38 * nu. Cha PM* 09 46 20.6312904432 -76 46 34.027571676   6.334 5.440     G8III 41 0
39 2MASS J09465051-8011352 TT* 09 46 50.5064868936 -80 11 35.104921764           K8 8 0
40 HD 85643 SB* 09 48 21.2050045992 -75 46 39.987573168   7.26 6.80     F5V 42 0
41 RX J0950.6-7640 X 09 50 33.7 -76 40 13           ~ 1 0
42 RX J0950.7-7740 * 09 50 43.63 -77 40 37.8           K7V:e 2 0
43 RX J0951.5-7816 X 09 51 28.1 -78 16 49           ~ 1 0
44 HD 86356 TT* 09 51 50.6839987728 -79 01 37.826858352   10.93 10.201   9.243 K0Ve 33 0
45 RX J0953.1-7657 BLL 09 53 04.3615472853 -76 58 02.120566089           ~ 38 0
46 HD 86588 TT* 09 53 13.7246814696 -79 33 28.627177500   10.17 9.63     F6V 23 0
47 RX J0957.4-7554 X 09 57 22.2 -75 54 30           ~ 2 0
48 RX J1001.1-7913 TT* 10 01 08.7349806576 -79 13 07.685018184     13.302   11.284 M0.5 23 0
49 RX J1003.7-8015 X 10 03 41.7 -80 15 26           ~ 1 0
50 RX J1003.7-8449 X 10 03 44.3 -84 49 42           ~ 1 0
51 RX J1005.3-7749 TT* 10 05 20.0290939080 -77 48 42.243448788   14.76 13.35 13.12 11.32 M1e 23 0
52 V* DR Oct RS* 10 07 29.5296132223 -85 04 32.990588292   9.42 8.685   7.709 G3V 116 0
53 RX J1007.9-7748 PM* 10 07 43.7150873811 -77 48 41.461392081   13.676 12.304 12.141   dM0e 5 0
54 2MASS J10093502-8105509 TT* 10 09 35.0354015640 -81 05 50.897061420           G8 10 0
55 RX J1010.6-8154 X 10 10 34.1 -81 54 42           ~ 1 0
56 [K2001c] 27 TT* 10 14 08.07 -76 36 32.8   15.802 14.186     M4 19 0
57 2MASS J10142048-8138423 TT* 10 14 20.4530136840 -81 38 42.272891376           K7 13 0
58 RX J1015.0-8004 X 10 15 01.4 -80 04 16           ~ 1 0
59 2MASS J10175369-7431172 TT* 10 17 53.6912621520 -74 31 17.367896280     12.50     G8 9 0
60 RX J1021.5-7933 X 10 21 32.9 -79 33 45           ~ 1 0
61 * I Car V* 10 24 23.7055275402 -74 01 53.799900604 4.35 4.36 4.01 3.67 3.48 F3V 143 0
62 HD 92210 PM* 10 33 56.5794738528 -80 31 00.344127972   7.57 7.18     F3V 27 0
63 2MASS J10354856-7858583 TT* 10 35 48.5440497000 -78 58 58.305048204     13.71     K6 11 0
64 RX J1035.8-7737 X 10 35 49.9 -77 37 53           ~ 1 0
65 HD 92727 ** 10 39 31.72928 -75 37 56.2785           F7/8(V) 27 0
66 RX J1042.3-7953 * 10 42 20.3 -79 53 55           K4 1 0
67 2MASS J10443523-7849244 TT* 10 44 35.2075938024 -78 49 24.470246928     14.52     M3e 11 0
68 RX J1048.4-7422 X 10 48 21.8 -74 22 28           ~ 1 0
69 RX J1048.8-8418 X 10 48 48.5 -84 18 15           ~ 1 0
70 2MASS J10485467-7655450 TT* 10 48 54.6881294952 -76 55 45.111560088           K6 10 0
71 RX J1050.2-7513 X 10 50 09.3 -75 13 45           ~ 1 0
72 RX J1054.4-7419 X 10 54 24.1 -74 19 36           ~ 1 0
73 Hen 3-545 Or* 10 59 06.9715593000 -77 01 40.309233240   12.91 11.136   9.596 K4Ve 237 0
74 RX J1059.6-7922 X 10 59 35.5 -79 22 28           ~ 1 0
75 RX J1101.5-7655 PM* 11 01 27.1123051608 -76 55 30.712558980           ~ 9 0
76 V* CS Cha Or* 11 02 24.8763629208 -77 33 35.667131796   12.88 11.69   10.123 K2Ve 261 0
77 RX J1104.6-7852 X 11 04 36.2 -78 52 52           ~ 1 0
78 RX J1105.8-7844 X 11 05 46.6 -78 45 00           ~ 1 0
79 CHX 6 X 11 05 48.2 -77 07 26           ~ 3 0
80 HD 96675 Or* 11 05 57.8105960448 -76 07 48.884316960   7.82 7.68   8.48 B5V 88 0
81 Ass Cha T 2-21 TT* 11 06 15.3471261840 -77 21 56.720362608   12.58 11.01   9.35 G5Ve 144 0
82 RX J1108.2-7728 Y*O 11 07 55.775088 -77 27 25.52724   15.26 13.40 13.07 11.04 K3Ve 59 0
83 V* VW Cha Or* 11 08 01.502064 -77 42 28.87524 13.91 14.165 12.761 12.653 10.69 K7+M0 202 0
84 [AKS95b] RX J1108.8-7519a TT* 11 08 49.73 -75 19 41.6           ~ 9 0
85 2MASS J11085326-7519374 Or* 11 08 53.2624718232 -75 19 37.422907320     12.17     M2 22 1
86 V* PU Car TT* 11 08 53.6905436304 -75 21 36.001367136   15.487 14.275 14.560   M1Ve 40 0
87 [CCE98] 1-74 TT* 11 09 17.6942588064 -76 27 57.926988648   15.48 13.92   11.72 K4Ve 51 0
88 V* HX Cha Or* 11 09 54.062760 -76 29 25.54332       16.08 14.03 M3.5+M7 73 0
89 V* WW Cha TT* 11 10 00.0802739160 -76 34 57.963853416   14.74 14.10   10.95 ~ 165 0
90 RX J1110.0-7854 X 11 10 01.6 -78 54 21           ~ 1 0
91 V* WY Cha Or* 11 10 07.0339153464 -76 29 37.674167388   15.29 13.87   11.62 K8Ve 95 1
92 V* XX Cha Or* 11 11 39.6728641032 -76 20 15.032221548   16.67 15.28   12.56 M3Ve 137 1
93 CHX 18N TT* 11 11 46.3370290776 -76 20 08.948823324   13.27 11.96   10.37 K5IVe 93 1
94 CHX 18 X 11 11 49.8 -76 19 48           ~ 64 1
95 Sz 41 TT* 11 12 24.3973943352 -76 37 06.181395384   11.2 11.60   10.22 K7+M2.5 115 1
96 V* CV Cha Or* 11 12 27.7055693328 -76 44 22.302807396   12.02 10.98 10.51 9.76 G9Ve 216 1
97 HJM E 1-8 TT* 11 12 42.9828272280 -76 37 04.868196276         10.95 K3Ve 42 0
98 HJM E 4-4 Or* 11 13 20.1444527808 -77 01 04.444538196   16.17 14.63   12.31 M2.75 29 0
99 RX J1117.0-8028 PM* 11 16 57.2996112672 -80 27 52.197887340   16.720 15.011 14.743   M4e 19 0
100 Ass Cha T 1-32 Or* 11 17 36.9756803040 -77 04 38.123504472   13.1 13.50   11.78 M0.5e 102 0
101 CPD-77 660 TT* 11 20 19.8911036832 -78 28 21.186312744   11.98 10.924 10.567 9.362 K5e 24 0
102 HD 99134 SB* 11 20 34.8984981408 -84 20 28.795457256   9.75 8.62     K1III 11 0
103 RX J1123.2-7924 TT* 11 22 55.6421746920 -79 24 44.005377168     13.72     M1.5 20 0
104 6dFGS gJ112338.0-760233 EmG 11 23 38.0069551536 -76 02 32.841813588   18.34   16.77   ~ 6 0
105 HD 99827 TT* 11 25 17.7399826296 -84 57 16.359618801   8.08 7.64     F5V 54 0
106 HD 99558 Ro* 11 25 47.9495735568 -76 30 29.113262460   10.31 9.075   7.653 K0III 14 0
107 RX J1126.1-7630 X 11 26 05.7 -76 30 53           ~ 1 0
108 2MASS J11291261-7546263 TT* 11 29 12.6349452648 -75 46 26.416175772     12.91     K3Ve 28 0
109 PMN J1130-7801 BLL 11 30 31.9491810471 -78 01 05.537610658           ~ 34 1
110 RX J1134.1-7800 * 11 34 05.7 -78 00 25           M4V:e 3 0
111 * pi. Cha PM* 11 37 15.6419931909 -75 53 47.519832950   5.974 5.637     A9IV 75 0
112 RX J1140.3-8321 TT* 11 40 16.6137236784 -83 21 00.350133984   12.604 11.464 11.197 10.132 K4Ve 37 0
113 RX J1143.3-7818 X 11 43 17.0 -78 18 38           ~ 1 0
114 V* DZ Cha TT* 11 49 31.8528592968 -78 51 01.062617652   14.330 12.766 12.511 10.732 M0Ve 82 0
115 RX J1150.1-8345 X 11 50 05.3 -83 45 28           ~ 1 0
116 RX J1150.4-7704 TT* 11 50 28.2998335776 -77 04 38.269946136     12.0   10.54 K4 24 0
117 RX J1150.9-7411 TT* 11 50 44.9860743984 -74 11 13.549913556   16.10 14.63 14.28 11.84 M3.7 19 0
118 HD 103673 * 11 55 57.0811360224 -77 00 30.271664088   9.28 8.60     G5V 28 0
119 V* T Cha Or* 11 57 13.5245085552 -79 21 31.530508884   10.00 11.86     K0e 304 1
120 [FLG2003] eps Cha 20 TT* 11 58 26.8127478312 -77 54 45.267517728   15.85 14.29     M3Ve 25 0
121 V* DW Cha Or* 11 58 28.1662230312 -77 54 29.563860420   11.63 10.502   9.011 K4Ve 49 1
122 2MASS J11583429-7913175 TT* 11 58 34.2908059968 -79 13 17.681212884     13.02     K3 13 0
123 RX J1159.7-7601 TT* 11 59 42.2711847672 -76 01 26.178271284   12.46 11.11   9.858 K4Ve 71 0
124 V* DX Cha Ae* 12 00 05.0868602544 -78 11 34.565724312   6.81 6.60     A4V 365 0
125 HD 104467 TT* 12 01 39.1168325928 -78 59 16.915311240   9.26 8.466   7.678 G3V(e) 62 0
126 RX J1202.1-7853 TT* 12 02 03.7125300480 -78 53 01.320796464     12.450   10.49 M0e 32 0
127 RX J1202.8-7718 TT* 12 02 54.6320153808 -77 18 38.075876532     14.483   12.081 M3.5 27 0
128 2MASS J12033923-8129422 TT* 12 03 39.1709536176 -81 29 42.212654988           K1 13 0
129 RX J1204.6-7731 TT* 12 04 36.1405166328 -77 31 34.731426468     13.873   11.297 M3 39 0
130 RX J1205.7-8115 * 12 05 43.5 -81 15 35           M3V:e 1 0
131 RX J1207.7-7953 TT* 12 07 48.2795515656 -79 52 42.373806168     14.455   11.943 ~ 22 0
132 CPD-75 783 TT* 12 07 51.174576 -75 55 16.05828   11.16 10.04 9.90 8.584 K4(e) 22 0
133 RX J1209.8-7344 TT* 12 09 42.8209730184 -73 44 41.444953692   12.31 11.29   10.135 K1e 21 0
134 RX J1216.8-7753 TT* 12 16 45.9354065016 -77 53 33.462798648     13.851   11.568 M3 32 0
135 HD 106772 * 12 17 26.9112030432 -80 35 06.827693568   9.40 8.54     G4III 22 0
136 RX J1219.7-7404 TT* 12 19 43.7030774208 -74 03 57.254127300     13.1   10.95 M1 40 0
137 HD 107145 PM* 12 19 45.4064562576 -76 48 03.666016728   7.275 6.837     F5IV/V 45 0
138 RX J1220.4-7407 TT* 12 20 21.7911659448 -74 07 39.516658140     12.780   10.52 M1V 42 0
139 CD-74 673 TT* 12 20 34.3777314336 -75 39 28.630039572   11.55 10.588   9.449 K3Ve 41 0
140 HD 107722 TT* 12 23 29.0429848776 -77 40 51.427021368   8.75 8.29     F6V 34 0
141 CD-74 681 TT* 12 24 47.3523446520 -75 03 09.043286292 12.297 11.543 10.560 9.877 9.275 K3Ve 38 0
142 CD-78 502 TT* 12 25 13.4187998472 -78 57 34.670490084   11.36 10.70     G7 23 0
143 RX J1231.9-7848 TT* 12 31 56.0768455752 -78 48 32.520741012     14.051   11.700 M2.5 16 0
144 2MASS J12321517-7650293 AG? 12 32 15.1994109288 -76 50 29.494033656           ~ 3 0
145 HD 109138 TT* 12 33 29.7897267528 -75 23 11.250927348   10.24 9.47     K0V 57 0
146 RX J1235.3-8442 X 12 35 19.2 -84 42 56           ~ 1 0
147 RX J1235.9-7419 X 12 35 54.2 -74 19 07           ~ 1 0
148 RX J1237.7-7719 * 12 37 37.5149676696 -77 19 01.450868016           ~ 3 0
149 CD-74 712 TT* 12 39 21.2761289184 -75 02 39.186556764   11.15 10.303   9.197 K3Ve 52 0
150 RX J1240.8-7828 X 12 40 47.2 -78 28 41           ~ 1 0
151 RX J1243.1-7458 TT* 12 42 53.3342783088 -74 58 47.966310264   16.37 14.81 14.51 12.36 M3e 13 1
152 RX J1243.6-7834 TT* 12 43 36.6269751288 -78 34 07.683118356     13.063   10.716 ~ 14 0
153 RX J1245.7-7542 X 12 45 40.6 -75 42 19           ~ 1 0
154 RX J1248.0-7603 X 12 48 00.9 -76 03 57           ~ 1 0
155 RX J1256.0-7417 ** 12 55 55.226904 -74 17 19.59504   16.18 14.51 14.20   M3V:e 2 0
156 Sz 49 Y*O 13 00 53.2473650928 -76 54 15.206649912   15.6       M0.5 47 0
157 ASAS J130056-7653.9 TT* 13 00 56.2347315648 -76 54 02.375615448   13.79 12.35 11.93 10.446 K5 19 0
158 2MASS J13030444-7707027 TT* 13 03 04.4591495760 -77 07 02.759053872     13.23     M0 16 1
159 RX J1306.6-7654 X 13 06 37.7 -76 54 50           ~ 1 0
160 TYC 9413-2147-1 TT* 13 07 22.9175828808 -76 02 36.250602504   11.649 10.428 10.259   K0 19 0
161 RX J1320.0-7406 TT* 13 19 57.2 -74 06 10           G5 3 0
162 RX J1320.3-7948 X 13 20 15.8 -79 48 22           ~ 1 0
163 HD 116009 * 13 23 52.7976710328 -75 55 49.459668312   8.22 7.80     F3IV 27 0
164 RX J1325.6-8218 X 13 25 38.6 -82 18 45           ~ 1 0
165 2MASS J13254188-7955160 TT* 13 25 41.8746157752 -79 55 16.198786884   12.387 11.509 11.308 10.60 K1 13 0
166 RX J1332.1-7538 X 13 32 05.2 -75 38 07           ~ 1 0
167 RX J1337.4-8323 X 13 37 21.9 -83 23 37           ~ 1 0
168 RX J1337.5-7854 X 13 37 31.9 -78 54 38           ~ 1 0
169 RX J1338.2-7801 X 13 38 11.8 -78 01 03           ~ 2 0
170 HD 118285 Pu* 13 39 11.9901541944 -75 41 01.612763556 6.09 6.306 6.323     B8IV 45 0
171 RX J1344.2-7529 X 13 44 12.7 -75 29 56           ~ 1 0
172 2MASS J13462594-7409295 TT* 13 46 25.9460587032 -74 09 29.585033820           G4 3 0
173 RX J1347.0-7443 X 13 46 57.9 -74 43 20           ~ 1 0
174 CD-75 652 TT* 13 49 12.9354906672 -75 49 47.448396768   10.22 9.680   8.724 G1V 29 0
175 RX J1356.2-7406 X 13 56 12.1 -74 06 25           ~ 2 0
176 RX J1400.5-8121 X 14 00 29.7 -81 21 58           ~ 1 0
177 HD 122235 * 14 06 42.9858057456 -79 49 12.866472120   10.602 9.87     K1III 13 0
178 RX J1412.0-8410 X 14 11 58.0 -84 10 04           ~ 2 0
179 1RXS J141459.5-782216 TT* 14 14 59.5 -78 22 16     12.31     G5 8 0
180 HD 124017 SB* 14 15 36.5341891320 -75 58 44.106227724   10.21 8.901   7.545 K2III 12 0

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