The NuSTAR extragalactic surveys: source catalog and the compton-thick fraction in the UDS field
Author
dc.contributor.author
Masini, A.
Author
dc.contributor.author
Saez, C.
Admission date
dc.date.accessioned
2018-08-29T14:55:57Z
Available date
dc.date.available
2018-08-29T14:55:57Z
Publication date
dc.date.issued
2018
Cita de ítem
dc.identifier.citation
The Astrophysical Journal Supplement Series, 235:17 (19pp), 2018 March
es_ES
Identifier
dc.identifier.other
10.3847/1538-4365/aaa83d
Identifier
dc.identifier.uri
https://repositorio.uchile.cl/handle/2250/151361
Abstract
dc.description.abstract
We present the results and the source catalog of the NuSTAR survey in the UKIDSS Ultra Deep Survey (UDS) field, bridging the gap in depth and area between NuSTAR's ECDFS and COSMOS surveys. The survey covers a similar to 0.6 deg(2) area of the field for a total observing time of similar to 1.75 Ms, to a half-area depth of similar to 155 ks corrected for vignetting at 3-24 keV, and reaching sensitivity limits at half-area in the full (3-24 keV), soft (3-8 keV), and hard (8-24 keV) bands of 2.2 x 10(-14) erg cm(-2) s(-1), 1.0 x 10(-14) erg cm(-2) s(-1), and 2.7 x 10(-14) erg cm(-2) s(-1), respectively. A total of 67 sources are detected in at least one of the three bands, 56 of which have a robust optical redshift with a median of < z > similar to 1.1. Through a broadband (0.5-24 keV) spectral analysis of the whole sample combined with the NuSTAR hardness ratios, we compute the observed Compton-thick (CT; N-H > 10(24) cm(-2)) fraction. Taking into account the uncertainties on each N-H measurement, the final number of CT sources is 6.8 +/- 1.2. This corresponds to an observed CT fraction of 11.5% +/- 2.0%, providing a robust lower limit to the intrinsic fraction of CT active galactic nuclei and placing constraints on cosmic X-ray background synthesis models.
es_ES
Patrocinador
dc.description.sponsorship
NASA
NNG08FD60C
NNX15AP24G
National Aeronautics and Space Administration
ESA Member States
NASA
ASI/INAF
I/037/12/0011/13
I/037/12/0
Caltech NuSTAR
44A-1092750
Herchel Smith Fellowship of the University of Cambridge
CONICYT-Chile
Basal-CATA PFB-06/2007
FONDECYT
Regular 1160999