J/ApJS/235/17 NuSTAR Extragalactic Surveys: UDS field (Masini+, 2018)
The NuSTAR Extragalactic Surveys: source catalog and the Compton-thick fraction
in the UDS field.
Masini A., Civano F., Comastri A., Fornasini F., Ballantyne D.R.,
Lansbury G.B., Treister E., Alexander D.M., Boorman P.G., Brandt W.N.,
Farrah D., Gandhi P., Harrison F.A., Hickox R.C., Kocevski D.D., Lanz L.,
Marchesi S., Puccetti S., Ricci C., Saez C., Stern D., Zappacosta L.
<Astrophys. J. Suppl. Ser., 235, 17 (2018)>
=2018ApJS..235...17M 2018ApJS..235...17M
ADC_Keywords: X-ray sources; Cross identifications; Redshifts; Surveys; Optical
Keywords: galaxies: active ; galaxies: evolution ; X-rays: general
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 ∼0.6deg2 area of the field for a total observing time of ∼1.75Ms,
to a half-area depth of ∼155ks corrected for vignetting at 3-24keV,
and reaching sensitivity limits at half-area in the full (3-24keV),
soft (3-8keV), and hard (8-24keV) bands of 2.2x10-14erg/cm2/s,
1.0x10-14erg/cm2/s, and 2.7x10-14erg/cm2/s, 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 ∼1.1.
Through a broadband (0.5-24keV) spectral analysis of the whole sample
combined with the NuSTAR hardness ratios, we compute the observed
Compton-thick (CT; NH>1024cm-2) fraction. Taking into account
the uncertainties on each NH 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.
Description:
In this paper, we report on the NuSTAR survey (35 observations
spanning 2016-02-06 to 2016-11-18) of the UDS field. This field is the
deepest component of the UKIRT Infrared Deep Sky Survey (UKIDSS;
Almaini+ 2007ASPC..379..163A 2007ASPC..379..163A ; Lawrence+ 2012, II/319) and has an
extensive multiwavelength coverage (see section 1).
In the X-ray band, the NuSTAR coverage is centered on the coordinates
RAJ2000=34.4deg;DEJ2000=-5.1deg, and it overlaps with the Subaru
XMM-Newton Deep Survey (SXDS; Ueda+ 2008, J/ApJS/179/124) and Chandra
UDS survey (Kocevski+ 2018, J/ApJS/236/48) fields.
We assume a flat λCDM cosmology (H0=70km/s/Mpc,
ΩM=0.3, ΩΛ=0.7) throughout the paper.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table7.dat 472 67 NuSTAR UKIDSS Ultra Deep Survey (UDS) catalog
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See also:
B/xmm : XMM-Newton Obs. Log (XMM-Newton Science Operation Center, 2012)
B/chandra : The Chandra Archive Log (CXC, 1999-2014)
II/319 : UKIDSS-DR9 LAS, GCS and DXS Surveys (Lawrence+ 2012)
III/334 : VISTA Deep Extragalactic Observations (VIDEO) (Jarvis+, 2013)
VIII/76 : Leiden/Argentine/Bonn (LAB) Survey of Galactic HI (Kalberla+ 2005)
VIII/103 : Herschel Multi-tiered Extragalactic Survey (Oliver+, 2012)
J/MNRAS/372/1621 : SCUBA Half-Degree Extragalactic Survey. II (Coppin+, 2006)
J/ApJ/642/673 : IR-selected obscured AGN candidates (Polletta+, 2006)
J/MNRAS/372/741 : SXDF 100µJy catalogue (Simpson+, 2006)
J/A+A/475/775 : INTEGRAL all-sky survey of X-ray sources (Krivonos+, 2007)
J/ApJS/176/1 : Subaru/XMM-Newton deep survey (SXDS). II. (Furusawa+, 2008)
J/ApJ/681/113 : Swift BAT survey of AGNs (Tueller+, 2008)
J/ApJS/179/124 : Subaru/XMM-Newton deep survey (SXDS) III. (Ueda+, 2008)
J/ApJ/728/58 : Swift-BAT survey of AGNs (Burlon+, 2011)
J/A+A/535/A65 : Galaxy clusters in the 4 CFHTLS Wide fields (Durret+, 2011)
J/ApJS/201/34 : Swift-INTEGRAL X-ray (SIX) survey (Bottacini+, 2012)
J/ApJS/207/19 : Hard X-ray survey from Swift-BAT (Baumgartner+, 2013)
J/ApJS/206/10 : CANDELS multiwavelength catalog (Galametz+, 2013)
J/ApJ/808/185 : NuSTAR surveys: COSMOS catalog (Civano+, 2015)
J/ApJ/808/184 : NuSTAR surveys: ECDF-S catalog (Mullaney+, 2015)
J/ApJ/815/L13 : Compton-thick AGNs from 70-month Swift/BAT (Ricci+, 2015)
J/ApJ/819/62 : The COSMOS-Legacy Survey (CLS) catalog (Civano+, 2016)
J/ApJ/836/99 : NuSTAR serendipitous survey: 40-month (Lansbury+, 2017)
J/ApJS/236/48 : The Chandra UDS survey (X-UDS) (Kocevski+, 2018)
Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- --- [NuSTAR]
8- 21 A14 --- NuSTAR NuSTAR source identifier (JHHMMSS+DDMM.m)
(updated by the author)
23- 24 I2 --- Seq [1/67] Internal index number
26- 32 F7.4 deg RAdeg [34/34.9] Right Ascension (J2000)
34- 40 F7.4 deg DEdeg [-5.4/-4.7] Declination (J2000)
42- 48 F7.3 --- 3-24DETML [0/543] The 3-24keV band deblended DET_ML
(0 if undetected)
50- 54 F5.1 ks 3-24Exp [27.7/414] The 3-24keV band exposure time
at the position of the source
56- 61 F6.1 ct 3-24Tcts [82/1053] The 3-24keV band total counts (1)
63- 68 F6.2 ct 3-24Bck [24/392.2] The 3-24keV band deblended
background counts (1)
70- 75 F6.2 ct 3-24Net [28.8/740.4] The 3-24keV band net counts
(3σ if undetected)
77- 81 F5.2 ct E_3-24Net [12/39]?=0 Positive error in 3-24Net (2)
83- 87 F5.2 ct e_3-24Net [11/37]?=0 Negative error in 3-24Net (2)
89- 96 F8.6 ct/s 3-24CR [0.0001/0.004] 3-24keV band count rate (1)
98-105 E8.2 mW/m2 3-24F The 3-24keV band aperture-corrected flux (3)
107-114 E8.1 mW/m2 E_3-24F ?=-99 Positive error in 3-24F
116-123 E8.1 mW/m2 e_3-24F ?=-99 Negative error in 3-24F
125-131 F7.3 --- 3-8DETML [0/421] The 3-8keV band deblended DET_ML
(0 if undetected)
133-137 F5.1 ks 3-8Exp [30.4/434] The 3-8keV band exposure time
at the position of the source
139-143 F5.1 ct 3-8Tcts [36/609] The 3-8keV band total counts (1)
145-150 F6.2 ct 3-8Bck [10.8/177.1] The 3-8keV band deblended
background counts (1)
152-157 F6.2 ct 3-8Net [19.9/466.1] The 3-8keV band net counts
(3σ if undetected)
159-163 F5.2 ct E_3-8Net [9.8/29]?=0 Positive error in 3-8Net (2)
165-169 F5.2 ct e_3-8Net [8/28]?=0 Negative error in 3-8Net (2)
171-178 F8.6 ct/s 3-8CR [0.0001/0.002] The 3-8keV band count rate (1)
180-187 E8.2 mW/m2 3-8F The 3-8keV band aperture-corrected flux (3)
189-196 E8.1 mW/m2 E_3-8F ?=-99 Positive error in 3-8F
198-205 E8.1 mW/m2 e_3-8F ?=-99 Negative error in 3-8F
207-213 F7.3 --- 8-24DETML [0/178.2] 8-24keV band deblended DET_ML
(0 if undetected)
215-219 F5.1 ks 8-24Exp [24.6/400] The 8-24keV band exposure time
at the position of the source
221-225 F5.1 ct 8-24Tcts [32/473] The 8-24keV band total counts (1)
227-232 F6.2 ct 8-24Bck [10/214.1] The 8-24keV band deblended
background counts (1)
234-239 F6.2 ct 8-24Net [11/299.1]?=-99 8-24keV band net counts
(3σ if undetected)
241-245 F5.2 ct E_8-24Net [0/27] Positive error in 8-24Net (2)
247-251 F5.2 ct e_8-24Net [0/26] Negative error in 8-24Net (2)
253-262 F10.6 ct/s 8-24CR [0.0001/0.002]?=-99 The 8-24keV band
count rate (1)
264-272 E9.2 mW/m2 8-24F ?=-99 The 8-24keV band aperture-corrected
flux (3)
274-281 E8.1 mW/m2 E_8-24F ?=-99 Positive error in 8-24F
283-290 E8.1 mW/m2 e_8-24F ?=-99 Negative error in 8-24F
292-296 F5.2 --- HR [-1/1] Hardness ratio (4)
298-302 F5.2 --- b_HR [-1/0.8] Lower Hardness ratio boundary (4)
304-308 F5.2 --- B_HR [-0.8/1] Upper Hardness ratio boundary (4)
310-329 A20 --- XMMID XMM counterpart identifier (SXDS or 3XMM) (5)
331-338 F8.4 deg RAXdeg ?=-99 XMM Right Ascension (J2000)
340-347 F8.4 deg DEXdeg ?=-99 XMM Declination (J2000)
349-354 F6.2 ct/ks USCR [0/52.7]?=-99 XMM ultrasoft band 0.3-0.5keV
count rate
356-361 F6.2 ct/ks e_USCR [0.02/0.7]?=-99 USCR 1σ uncertainty
363-368 F6.2 ct/ks SCR [0/132]?=-99 XMM soft band 0.5-2.0keV
count rate
370-375 F6.2 ct/ks e_SCR [0.08/1.4]?=-99 SCR 1σ uncertainty
377-382 F6.2 ct/ks MCR [0.2/23.5]?=-99 XMM Medium band 2.0-4.5keV
count rate
384-389 F6.2 ct/ks e_MCR [0.07/0.8]?=-99 MCR 1σ uncertainty
391-396 F6.2 ct/ks UHCR [0.1/10.3]?=-99 XMM ultrahard band 4.5-10keV
count rate
398-403 F6.2 ct/ks e_UHCR [0.08/0.8]?=-99 UHCR 1σ uncertainty
405-409 F5.1 arcsec SepNXmm [0.9/28]?=-99 Distance between NuSTAR and
XMM sources
411-411 I1 --- Nxmm [0/3] Number of XMM counterparts within 30"
413-417 A5 --- --- [xuds_]
418-420 I03 --- XUDS ?=-99 XUDS catalog counterpart identifier (6)
422-426 F5.1 arcsec SepNX [1.5/29.5]?=-99 Distance between NuSTAR and
XUDS sources
428-428 I1 --- Nxuds [0/3] Number of XUDS counterparts within 30"
430-437 F8.4 deg RAOdeg ?=-99 Optical counterpart Right Ascension
(J2000) (7)
439-446 F8.4 deg DEOdeg ?=-99 Optical counterpart Declination
(J2000) (7)
448-455 F8.4 --- zspec [0.05/3.2]?=-99 Optical counterpart
spectroscopic redshift (7)
457-459 A3 --- SCl Spectroscopic classification (8)
461-467 F7.3 --- zphot [0.05/3.1]?=-99 Optical counterpart
photometric redshift (7)
469-472 A4 --- PCl Photometric classification (8)
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Note (1): In a 20"-radius circular aperture.
Note (2): Computed using Gehrels statistic (0 if undetected).
Note (3): In a 20"-radius circular aperture
(3σ upper limit if undetected).
Note (4): Computed with BEHR (Park+ 2006ApJ...652..610P 2006ApJ...652..610P).
Note (5): Primary counterpart in 30" from the SXDS catalog
(Ueda+ 2008, J/ApJS/179/124; <[UWS2008] NNNN> in Simbad)
-99 if no counterpart is found.
Note (6): Primary counterpart in 30" from the XUDS catalog
(Kocevski+ 2018, J/ApJS/236/48)
Note (7): From Akiyama+ 2015PASJ...67...82A 2015PASJ...67...82A
Note (8): Classification as follows:
BLA = Broad-line AGN (27 occurrences);
NLA = Narrow-line AGN (21 occurrences);
NID = Object observed in optical but cannot be identified
with the optical spectrum (2 occurrences);
NSP = Not observed in optical (6 occurrences);
-99 = no counterpart in Akiyama+ 2015PASJ...67...82A 2015PASJ...67...82A (11 occurrences)
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History:
From electronic version of the journal
Acknowledgments:
Alberto Masini [Dartmouth College]
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 22-Aug-2018