J/ApJ/595/685 HST imaging in Chandra Deep Field-South (Grogin+, 2003)
Hubble Space Telescope imaging in the Chandra Deep Field-South. III. Quantitative morphology of the 1 million second Chandra counterparts and comparison with the field population. Grogin N.A., Koekemoer A.M., Schreier E.J., Bergeron J., Giacconi R., Hasinger G., Kewley L., Norman C., Rosati P., Tozzi P., Zirm A. <Astrophys. J. 595, 685 (2003)> =2003ApJ...595..685G
ADC_Keywords: Surveys ; Galaxies, photometry ; X-ray sources Keywords: galaxies: active - galaxies: fundamental parameters - galaxies: structure - surveys - X-rays: galaxies Abstract: We present quantitative morphological analyses of 37 Hubble Space Telescope (HST)/WFPC2 counterparts of X-ray sources in the 1Ms Chandra Deep Field South (CDFS, Cat. J/ApJS/139/369). We investigate (1) one-dimensional surface brightness profiles via isophotal ellipse fitting; (2) two-dimensional, point-spread function convolved, bulge+disk+nucleus profile fitting; (3) asymmetry and concentration indices compared with all ∼3000 sources in our three WFPC2 fields; and (4) near-neighbor analyses comparing local environments of X-ray sources versus the field control sample. Significant nuclear point-source optical components appear in roughly half of the resolved HST/WFPC2 counterparts, showing a narrow range of FX/Fopt, nuc consistent with the several HST-unresolved X-ray sources (putative type 1 active galactic nuclei [AGNs]) in our fields. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 69 3030 WFPC2 Source Catalog: Coordinates, Magnitudes, and Shape Parameters table2.dat 165 37 WFPC2 CDFS Counterparts: X-ray and optical properties
See also: J/ApJS/139/369 : Chandra Deep Field South. 1 Ms catalog (Giacconi+, 2002) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 9 F9.6 deg RAdeg Right Ascension in decimal degrees (J2000) 11- 20 F10.6 deg DEdeg Declination in decimal degrees (J2000) 22 A1 --- l_F606W Limit flag on Vmag 24- 28 F5.2 mag F606W The WFPC2 (F606W) V band magnitude 30 A1 --- l_F814W Limit flag on Imag 32- 36 F5.2 mag F814W The WFPC2 (F814W) I band magnitude 38- 42 F5.2 arcsec R0.5 The I band half-light radius 44- 47 F4.2 --- etaV The V band stellarity measure (G1) 49- 52 F4.2 --- etaI The I band stellarity measure (G1) 54- 58 F5.2 --- AI The I band asymmetry index 60- 63 A4 --- CV The V band concentration index 65- 68 A4 --- CI The I band concentration index
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 3 I3 --- XID Giacconi et al. (2002, Cat. J/ApJS/139/369) designation, [GZW2002] XID NNN in Simbad 5- 20 A16 --- IAU IAU designation (JHHMMSS.s-DDMMSS) 22 A1 --- l_logF2-10keV Limit flag on logF2-10keV (1) 23- 28 F6.2 [aW/m2] logF2-10keV X-ray flux in the hard (2-10keV) band (exprssed in 10-15erg/cm2/s) 30- 34 F5.2 --- HR Hardness ratio (2) 36- 40 F5.2 mag F606W F606W (V) magnitude 42- 46 F5.2 mag F814W F814W (I) magnitude 48- 51 F4.2 arcsec R0.5 The I band half-light radius 53- 56 F4.2 --- etaV The V band stellarity measure (G1) 58- 61 F4.2 --- etaI The I band stellarity measure (G1) 63 A1 --- l_Fn/FtV [~] Limit flag on Fn/FtV (3) 64- 70 F7.5 --- Fn/FtV ? Nuclear-to-total flux ratio in V band 72 A1 --- lEFn/FtV Limit flag on E_Fn/FtV (4) 73- 79 F7.5 --- E_Fn/FtV ? Error in Fn/FtV (upper limit) 80- 85 F6.4 --- e_Fn/FtV ? Error in Fn/FtV (lower limit) 87 A1 --- l_Fn/FtI [~] Limit flag on Fn/FtI 88- 93 F6.4 --- Fn/FtI ? Nuclear-to-total flux ratio in I band 95 A1 --- lEFn/FtI Limit flag on E_Fn/FtI (4) 96-101 F6.4 --- E_Fn/FtI ? Error in Fn/FtI (upper limit) 103-108 F6.4 --- e_Fn/FtI ? Error in Fn/FtI (lower limit) 112-117 F6.3 --- AI The I band asymmetry index 118 A1 --- u_AI Uncertainty flag on AI 120-124 F5.3 --- e_AI rms uncertainty on AI 126-129 F4.2 --- CI The I band concentration index 131-134 F4.2 --- e_CI rms uncertainty on CI 136-165 A30 --- Comm Comments
Note (1): Sources detected only in CXO soft band (0.5-2keV) indicated with upper limits. Note (2): HR (H-S)/(H+S), where H=2-10keV counts, S=0.5-2keV counts Note (3): When Fn/FtV≃1, HST-unresolved sources omitted from two-dimensional fitting, plotted with Fnuc∼Ftot in fig.4 of the paper. Note (4): If 0 is not excluded at >3σ, only 3σ upper limit is shown.
Global notes: Note (G1): Stellarity measure, eta, defined such that eta -> 1 for an unresolved surface brightness profile and eta -> 0 for a resolved profile.
History: From electronic version of the journal References: Schreier et al., Paper I 2001ApJ...560..127S Koekemoer et al., Paper II 2002ApJ...567..657K
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 21-Nov-2003
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