2004ApJS..150...43G


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.18CEST10:55:19

2004ApJS..150...43G - Astrophys. J., Suppl. Ser., 150, 43 (2004/January-0)

The Chandra multiwavelength project: optical follow-up of serendipitous Chandra sources.

GREEN P.J., SILVERMAN J.D., CAMERON R.A., KIM D.-W., WILKES B.J., BARKHOUSE W.A., LACLUYZE A., MORRIS D., MOSSMAN A., GHOSH H., GRIMES J.P., JANNUZI B.T., TANANBAUM H., ALDCROFT T.L., BALDWIN J.A., CHAFFEE F.H., DEY A., DOSAJ A., EVANS N.R., FAN X., FOLTZ C., GAETZ T., HOOPER E.J., KASHYAP V.L., MATHUR S., McGARRY M.B., ROMERO-COLMENERO E., SMITH M.G., SMITH P.S., SMITH R.C., TORRES G., VIKHLININ A. and WIK D.R.

Abstract (from CDS):

We present follow-up optical g', r', and i' imaging and spectroscopy of serendipitous X-ray sources detected in six archival Chandra images included in the Chandra Multiwavelength Project (ChaMP). Of the 486 X-ray sources detected between 3x10–16 and 2x10–13 (with a median flux of 3x10–15) ergs/cm2/s, we find optical counterparts for 377 (78%), or 335 (68%) counting only unique counterparts. We present spectroscopic classifications for 125 objects, representing 75% of sources with r*<21 optical counterparts (63% to r*=22). Of all classified objects, 63 (50%) are broad-line active galactic nuclei (AGNs), which tend to be blue in (g*-r*) colors. X-ray information efficiently segregates these quasars from stars, which otherwise strongly overlap in these SDSS colors until z>3.5. We identify 28 sources (22%) as galaxies that show narrow emission lines, while 22 (18%) are absorption line galaxies. Eight galaxies lacking broad-line emission have X-ray luminosities that require they host an AGN (logLX>43). Half of these have hard X-ray emission suggesting that high gas columns obscure both the X-ray continuum and the broad emission line regions. We find objects in our sample that show signs of X-ray or optical absorption, or both, but with no strong evidence that these properties are coupled. ChaMP's deep X-ray and optical imaging enable multiband selection of small and/or high-redshift groups and clusters. In these six fields we have discovered three new clusters of galaxies, two with z>0.4, and one with photometric evidence for a similar redshift.

Abstract Copyright:

Journal keyword(s): Galaxies: Active - Galaxies: Quasars: General - Surveys - X-Rays: Galaxies

Simbad objects: 36

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Number of rows : 36

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NGC 1399 BiC 03 38 29.083 -35 27 02.67 11.05 9.74 9.59 8.12   ~ 1475 1
2 ACO S 373 ClG 03 38 30 -35 27.3           ~ 1598 0
3 2XMM J033841.3-353134 BLL 03 38 41.3741823441 -35 31 34.127034743   20.93   19.51   ~ 11 1
4 NGC 1404 GiP 03 38 51.917 -35 35 39.81 11.53 10.69 10.00 9.03   ~ 679 1
5 CXOMP J033912.2-352614 X 03 39 12.2 -35 26 14           ~ 1 0
6 2MASS J03392244-3525299 G 03 39 22.45 -35 25 29.9   17.7       ~ 2 0
7 LP 944-20 LM* 03 39 35.2525168530 -35 25 43.628465433     18.69 16.39 13.288 M9.5Ve 268 0
8 [VV2006] J033943.0-352410 QSO 03 39 42.9139427737 -35 24 10.057656699   19.86 19.68 18.72   ~ 12 0
9 FCSS J033943.1-352200 G 03 39 43.1 -35 21 59   17.5       ~ 3 0
10 [VV2006] J034015.4-352849 QSO 03 40 15.4216900936 -35 28 49.800790050   19.00 18.96 18.74   ~ 6 0
11 [VV2006] J054240.9-405516 QSO 05 42 40.9637125998 -40 55 15.485650329     19.5     ~ 6 0
12 ClG J0542-4100 ClG 05 42 49.9 -40 59 58           ~ 55 0
13 V* TX Col CV* 05 43 20.17 -41 01 54.3   14.5       ~ 137 0
14 CXOMP J054328.5-410119 G 05 43 28.5 -41 01 19           ~ 1 0
15 CXOMP J114013.9+655940 G 11 40 13.9 +65 59 40           ~ 1 0
16 ClG 1137+66 ClG 11 40 23.3 +66 09 01     21.0     ~ 135 0
17 CXOMP J114148.0+660603 X 11 41 48.0 +66 06 03           ~ 1 0
18 ClG J1416+4446 ClG 14 16 28.1 +44 46 38           ~ 44 0
19 FIRST J141655.7+445452 AGN 14 16 55.62 +44 54 53.1           ~ 2 0
20 2MASSI J1417008+445606 Sy1 14 17 00.8223053485 +44 56 06.331286859   16.93 16.63     ~ 229 0
21 ACO 2104 ClG 15 40 06.8 -03 17 39           ~ 101 0
22 [VV2006] J213945.0-234656 QSO 21 39 45.0 -23 46 56     22.87     ~ 7 0
23 ClG 2137-2353 ClG 21 40 12.8 -23 39 27     18.5     ~ 353 0
24 [VV2006] J214018.0-234920 QSO 21 40 18.0507208331 -23 49 20.167281489           ~ 5 0
25 CXOMP J234758.0+010329 AGN 23 47 58.0 +01 03 29           ~ 1 0
26 CXOMP J234758.9+010343 GiG 23 47 58.851 +01 03 43.38           ~ 2 0
27 [VV2006] J234811.5+005659 QSO 23 48 11.555 +00 57 00.51     22.50 21.450 21.46 ~ 9 0
28 CXOMP J234811.9+010301 G 23 48 11.9 +01 03 01           ~ 2 0
29 [KTF96] 2345+007 G5740 AGN 23 48 12.7 +00 57 50     24.250 23.360 22.720 ~ 7 0
30 [VV96] J234813.7+005638 QSO 23 48 13.7696575980 +00 56 39.963180583   21.13 20.53 20.480 20.75 ~ 13 0
31 CXOMP J234815.7+005350 ClG 23 48 15.7 +00 53 50           ~ 2 0
32 QSO B2345+007 QSO 23 48 19.1862763759 +00 57 17.504391350   20.88 20.56   20.68 ~ 175 1
33 QSO B2345+007A QSO 23 48 19.5838356060 +00 57 21.433922464   19.67 19.42   18.97 ~ 77 0
34 CXOCY J234835.4+005833 BLL 23 48 35.325 +00 58 32.87   21.74 21.27 20.590 20.980 ~ 9 0
35 CXOSEXSI J234835.5+005836 EmG 23 48 35.58 +00 58 36.6     25.50 22.660 24.80 ~ 5 0
36 PB 5542 QSO 23 48 40.0547861334 +01 07 53.492540404   18.64 18.46 18.390   ~ 30 0

    Equat.    Gal    SGal    Ecl

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2021.04.18-10:55:19

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