2000A&A...357..909M

Query : 2000A&A...357..909M

2000A&A...357..909M - Astronomy and Astrophysics, volume 357909-919 (2000/5-3)

Rosat HRI observations of the open cluster NGC 2516.

MICELA G., SCIORTINO S., JEFFRIES R.D., THURSTON M.R. and FAVATA F.

Abstract (from CDS):

We present ROSAT HRI observations of the NGC 2516, a young southern open cluster with low metallicity. We detect 73 X-ray sources already detected with the PSPC and 12 new X-ray sources. The higher HRI spatial resolution allows us to improve the position of the previous known sources, and to better determine the optical counterparts of X-ray sources with respect to the PSPC data. We find 28 sources with no catalogued counterparts, most with faint objects within their X-ray positional error circle. Multiband CCD photometry of these possible counterparts shows that about half of them are consistent with being dK and dM cluster members. Assuming that they are true NGC 2516 members, the derived X-ray luminosity is consistent with that observed in dK and dM stars in more metal-rich open clusters of similar age, suggesting that the activity level at which X-ray saturation occurs is insensitive to a change of a factor two in stellar metallicity.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: open clusters and associations: individual: NGC 2516 - stars: coronae - X-rays: stars

Nomenclature: Table 2: [MSJ2000] NN (Nos 1-85).

Simbad objects: 94

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Number of rows : 94
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 Cl* NGC 2516 SBL 31 * 07 56 02.2526870832 -60 38 45.903030108   14.29 13.42 13.45 12.67 ~ 30 0
2 NGC 2516 105 * 07 56 22.86 -60 51 50.1   12.18 11.56     ~ 8 0
3 [MSJ2000] 4 X 07 56 34.4 -60 36 48           ~ 1 0
4 Cl* NGC 2516 JTH 4598 * 07 56 34.6350694752 -60 48 03.459350052   14.845 13.984   12.968 ~ 26 0
5 CPD-60 944A a2* 07 56 45.1050993480 -60 48 54.285743628   8.345 8.370     B8pSi 56 0
6 CPD-60 944B Pu* 07 56 46.2620797099 -60 48 58.296559706   8.77 8.76     B8III 53 0
7 Cl* NGC 2516 JTH 5024 * 07 56 47.0908328064 -60 43 22.543973832   17.655 16.324   14.669 K7.1 35 0
8 NGC 2516 4 * 07 56 47.8337123472 -60 56 49.858610856   11.1 10.8   10.402 A7III 31 0
9 Cl* NGC 2516 JTH 5061 * 07 56 48.1765994568 -60 46 31.113432048   16.678 15.410   13.865 K6.1 33 0
10 Cl* NGC 2516 JTH 5447 * 07 56 59.5633374888 -60 49 56.692237836   17.903 16.555   14.64 K9.7 36 0
11 Cl* NGC 2516 JTH 5957 * 07 57 12.1614490152 -60 33 08.978149188   15.591 14.576   13.496 K2.2 35 1
12 Cl* NGC 2516 DAC 233 SB* 07 57 14.1713644152 -60 40 52.419243900   12.914 12.240   11.471 ~ 19 0
13 [DFM2003] 11 * 07 57 18.40 -60 48 16.3           ~ 4 0
14 Cl* NGC 2516 JTH 6220 * 07 57 19.4810686848 -60 56 28.617841644   16.3 15.123     ~ 11 0
15 CD-60 1936 * 07 57 19.8110014152 -60 48 46.298213784   9.49 9.30     B9V 45 0
16 NGC 2516 107 * 07 57 23.1724381440 -60 49 38.491908888   11.85 11.30   10.661 ~ 31 0
17 JTX 43 * 07 57 25.24 -60 44 59.5           ~ 5 0
18 Cl* NGC 2516 AR 97 SB* 07 57 28.4320921839 -60 51 29.426602774 14.43 14.186 13.402 13.248 12.526 ~ 34 0
19 JTX 46 X 07 57 29.0 -60 51 58           ~ 2 0
20 Cl* NGC 2516 EGG 111 SB* 07 57 30.9392174112 -60 48 31.764994128 15.26 15.00 14.08   13.058 ~ 12 0
21 Cl* NGC 2516 DAC 230 * 07 57 32.0211589296 -60 37 22.311708204   13.389 12.792     ~ 11 0
22 CD-60 1946 SB* 07 57 37.8603841224 -60 54 32.082010704   8.89 8.81     B9V+A4V 49 0
23 Cl* NGC 2516 DAC 306 * 07 57 44.0657717856 -60 47 27.876242544 14.79 14.59 13.83     ~ 11 0
24 JTX 64 X 07 57 46.88 -60 42 39.8           ~ 3 0
25 HD 65949 * 07 57 47.6703410424 -60 36 34.921501344 7.99 8.31 8.37     B8/9 108 0
26 Cl* NGC 2516 DAC 238 SB* 07 57 48.3525026544 -60 31 30.736331616   12.73 12.17   11.52 ~ 19 0
27 [MSJ2000] 25 X 07 57 49.3 -60 51 00           ~ 1 0
28 [MSJ2000] 26 X 07 57 51.7 -60 48 08           ~ 1 0
29 Cl* NGC 2516 DAC 403 SB* 07 57 55.4026796472 -60 48 27.198283896   13.624 12.905   12.029 ~ 35 0
30 Cl* NGC 2516 SBL 548 * 07 57 55.6238375424 -60 36 05.972048172   17.530 16.165   14.516 K6.2 19 0
31 [MSJ2000] 30 X 07 57 55.9 -60 42 33           ~ 1 0
32 Cl* NGC 2516 JTH 7622 * 07 57 56.1491889216 -60 42 38.784989988   18.693 17.169   15.262 ~ 19 0
33 NGC 2516 89 * 07 57 56.8318778376 -60 50 33.850832172   13.326 12.706   11.938 ~ 26 0
34 CD-60 1959 Pu* 07 57 57.3733007832 -60 44 16.168255512   10.05 9.87   9.642 A2V 30 0
35 Cl* NGC 2516 EGG 27 * 07 57 57.6789191197 -60 53 38.925055596   15.494 14.532 14.227 13.377 K2.6 38 0
36 Cl* NGC 2516 DAC 513 SB* 07 57 59.3204884680 -60 56 53.455933428   13.302 12.647   11.845 G 35 0
37 Cl* NGC 2516 JTH 7782 * 07 58 00.35 -60 52 12.2   17.178 15.761   14.055 ~ 15 0
38 NGC 2516 OpC 07 58 00.5 -60 46 36           ~ 793 0
39 NGC 2516 85 SB* 07 58 02.3958635640 -60 46 47.314297956 12.71 12.67 12.07   11.327 ~ 37 0
40 V* V391 Car a2* 07 58 02.5012020672 -60 48 46.812060396   8.89 8.96     A0pEuCrSr 67 0
41 JTS 3 X 07 58 05.0 -60 35 42           ~ 2 0
42 NGC 2516 87 SB* 07 58 05.3030063280 -60 45 03.337916832 13.40 13.36 12.74   11.953 ~ 41 0
43 CD-60 1964 * 07 58 08.0526772176 -60 46 49.994541948   8.43 8.38     B8.5V 38 0
44 [MSJ2000] 40 X 07 58 08.2 -60 46 53           ~ 1 0
45 NGC 2516 86 SB* 07 58 08.8496785944 -60 44 40.222744908 12.79 12.807 12.225 12.104 11.544 ~ 31 0
46 V* V392 Car SB* 07 58 10.4770762032 -60 51 57.409042680   9.69 9.48     A2Vp:Sr:Cr:Eu: 80 0
47 Cl* NGC 2516 HTR M77 X 07 58 11.4 -60 59 46           ~ 3 0
48 Cl* NGC 2516 HTR M F X 07 58 11.6 -61 02 09           ~ 3 0
49 CD-60 1969 Pe* 07 58 14.5217579496 -60 43 32.640844692   9.87 9.65   9.425 A2V 31 0
50 [MSJ2000] 45 X 07 58 16.3 -60 30 15           ~ 1 0
51 [DH96] 32 X 07 58 16.5 -60 35 52           ~ 2 0
52 NGC 2516 111 * 07 58 18.0219079344 -60 45 15.310702800   11.93 11.43   10.800 ~ 34 0
53 Cl* NGC 2516 DAC 907 * 07 58 19.8589117944 -60 41 58.192665396 12.98 12.99 12.39   11.627 ~ 30 0
54 Cl* NGC 2516 JTH 8584 * 07 58 21.6206972208 -60 58 50.316791484   15.836 14.680   13.386 K3.6 30 0
55 HD 66066B * 07 58 22.2659936496 -60 51 22.338259740   7.70 7.69     B8 28 0
56 HD 66066A SB* 07 58 22.3036478592 -60 51 27.783448236 6.43 7.05 7.07     B8V 47 0
57 Cl* NGC 2516 JTH 8634 SB* 07 58 22.9383349176 -60 40 20.371344492   15.459 14.516   13.398 K2.9 40 0
58 Cl* NGC 2516 EGG 16 SB* 07 58 23.3983736471 -60 54 56.881441282 15.58 15.16 14.21   12.979 ~ 29 0
59 Cl* NGC 2516 DAC 921 SB* 07 58 23.6256785256 -60 37 22.009815228   12.925 12.354   11.682 ~ 38 0
60 [MSJ2000] 52 X 07 58 26.7 -61 00 55           ~ 1 0
61 CD-60 1976 * 07 58 29.6867934672 -60 41 51.081972684   9.77 9.66   9.603 A0V 43 0
62 Cl* NGC 2516 JTH 8893 * 07 58 29.8104648192 -60 49 00.494385600   17.609 16.176   14.351 ~ 18 0
63 V* V419 Car dS* 07 58 30.9350301312 -60 37 46.501853340   10.94 10.60   10.197 A8V 34 0
64 Cl* NGC 2516 EGG 13 SB* 07 58 31.5173932104 -60 53 10.234477500   16.36 15.18   13.623 ~ 28 0
65 Cl* NGC 2516 JTH 8997 * 07 58 32.2098865032 -60 46 00.924525696   15.592 14.611 14.29 13.470 ~ 24 0
66 NGC 2516 78 * 07 58 33.3890177472 -60 44 27.417074568 13.62 13.53 12.84   12.005 ~ 34 0
67 Cl* NGC 2516 DAC 803 * 07 58 35.7255758376 -60 46 52.490530344 14.30 14.008 13.255 13.118 12.567 ~ 46 0
68 NGC 2516 72 ** 07 58 36.465816 -60 50 18.36132   12.30 11.69 11.55 10.980 ~ 28 0
69 NGC 2516 76 * 07 58 40.0493192208 -60 41 42.966782916   12.773 12.212   11.539 ~ 39 0
70 Cl* NGC 2516 JJT 26 * 07 58 40.7915706888 -60 41 53.315330820   14.369 13.590 13.525 12.701 ~ 29 0
71 Cl* NGC 2516 DAC 664 SB* 07 58 43.2597904104 -60 55 25.736785572   14.658 13.840   12.877 G 43 0
72 Cl* NGC 2516 DAC 933 SB* 07 58 43.7570207761 -60 32 56.732177572   13.409 12.620 12.414 11.743 ~ 28 0
73 Cl* NGC 2516 HTR M106 X 07 58 44.8 -61 02 11           ~ 3 0
74 Cl* NGC 2516 HTR M28 X 07 58 45.8 -60 55 38           ~ 3 0
75 Cl* NGC 2516 EGG 10 SB* 07 58 48.0488294928 -60 54 14.343021252   15.24 14.34   13.287 ~ 42 0
76 HD 66194 Be* 07 58 50.5509433080 -60 49 28.060460040 4.92 5.72 5.81 5.77 5.83 B3Vn 153 0
77 HD 66167 * 07 58 50.9506083696 -60 38 35.358436212   9.15 9.01 9.87   A0V 35 0
78 Cl* NGC 2516 JTH 9835 * 07 58 51.8741169888 -60 35 20.326570836   15.769 14.781   13.654 ~ 24 0
79 NGC 2516 71 * 07 58 52.3073093315 -60 53 37.666799771   12.80 12.14   11.384 ~ 19 0
80 CD-60 1993 * 07 58 53.0151207336 -60 36 10.592172072   9.95 9.78   9.542 A1/2V 31 0
81 Cl* NGC 2516 JTH 10010 LM* 07 58 56.3889987408 -60 47 22.920728532   18.675 17.183   15.253 M0.6 35 0
82 Cl* NGC 2516 JTH 10046 SB* 07 58 57.5495425896 -60 43 00.960651300   15.750 14.760   13.620 K3.3 38 0
83 JTX 137 X 07 59 11.6 -60 42 30           ~ 2 0
84 [MSJ2000] 73 X 07 59 18.6 -60 31 39           ~ 1 0
85 V* V422 Car a2* 07 59 21.2942838672 -60 48 56.393118468   9.13 9.08     B8/9pSi 84 0
86 NGC 2516 74 * 07 59 22.1649552744 -60 45 26.730954936   12.49 11.87     ~ 27 0
87 CD-60 2003 * 07 59 23.2610454552 -60 47 32.237563668   10.41 9.85     ~ 16 0
88 HD 66318 * 07 59 27.4731907320 -60 47 47.144978988   9.69 9.56   9.555 A2:IV:pSiSrCr 99 0
89 Cl* NGC 2516 DAC 96 SB* 07 59 32.1031859703 -60 48 45.029781686   14.798 13.941 13.669 12.860 K2.0 37 0
90 Cl* NGC 2516 DAC 877 * 07 59 36.4374649320 -60 44 31.737319620   13.725 12.898     ~ 8 0
91 Cl* NGC 2516 SBL 1094 * 07 59 50.1542457552 -60 43 34.249742472   15.571 14.557   13.400 K3.2 20 0
92 Cl* NGC 2516 SBL 1098 * 07 59 51.5913649464 -60 47 30.051595032           ~ 2 0
93 CD-60 2008 * 07 59 55.6157612774 -60 41 58.117120835   11.085 10.750 10.763 10.385 A7V 30 0
94 JTX 154 X 08 00 05.2 -60 46 08           ~ 2 0

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