J/MNRAS/508/5176 NuSTAR Extragalactic Surveys, NEP Field (Zhao+, 2021)
The NuSTAR Extragalactic Survey of the James Webb Space Telescope North Ecliptic
Pole Time-Domain Field.
Zhao X., Civano F., Fornasini F. M., Alexander D. M., Cappelluti N.,
Chen C.T., Cohen S.H., Elvis M., Gandhi P., Grogin N.A., Hickox R.C.,
Jansen R.A., Koekemoer A., Lanzuisi G., Maksym W.P., Masini A.,
Rosario D.J., Ward M.J., Willmer C.N.A., Windhorst R.A.
<Mon. Not. R. Astron. Soc. 508, 5176-5195 (2021)>
=2021MNRAS.508.5176Z 2021MNRAS.508.5176Z (SIMBAD/NED BibCode)
ADC_Keywords: X-ray sources; Cross identifications; Redshifts; Surveys; Optical
Keywords: surveys - galaxies: active - X-rays: general
Abstract:
We present the NuSTAR extragalactic survey of the James Webb Space
Telescope (JWST) North Ecliptic Pole (NEP) Time-Domain Field. The
survey covers a ∼0.16deg2 area with a total exposure of 681ks
acquired in a total of nine observations from three epochs. The survey
sensitivities at 20% of the area are 2.39, 1.14, 2.76, 1.52, and
5.20x10-14erg/cm2/s in the 3-24, 3-8, 8-24, 8-16, and 16-24keV
bands, respectively. The NEP survey is one of the most sensitive
extragalactic surveys with NuSTAR so far. A total of 33 sources were
detected above 95% reliability in at least one of the five bands. We
present the number counts, logN-logS, measured in the hard X-ray 8-24
and 8-16keV bands, uniquely accessible by NuSTAR down to such faint
fluxes. We performed source detection on the XMM-Newton and Chandra
observations of the same field to search for soft X-ray counterparts
of each NuSTAR detection. The soft band positions were used to
identify optical and infrared associations. We present the X-ray
properties (hardness ratio and luminosity) and optical-to-X-ray
properties of the detected sources. The measured fraction of candidate
Compton-thick (NH≥1024cm-2) active galactic nuclei, derived from
the hardness ratio, is between 3% to 27%. As this survey was designed
to have variability as its primary focus, we present preliminary
results on multi-epoch flux variability in the 3-24keV band.
Description:
Extragalactic Survey of the James Webb Space Telescope (JWST) North
Ecliptic Pole (NEP) Time-Domain Field (TDF), which was selected by
Jansen & Windhorst (2018, Cat. J/PASP/130/124001). The NuSTAR JWST
NEP-DTF catalog consists of 33 sources and their identified soft
X-ray, optical, and infrared counterparts.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
nep.dat 882 37 95 per cent reliability level catalogue
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See also:
J/ApJ/808/185 : NuSTAR extragalactic surveys: COSMOS field (Civano+, 2015)
J/ApJ/808/184 : NuSTAR extragalactic surveys: UDS field (Masini+, 2015)
J/ApJ/817/34 : NuSTAR extragalactic surveys: ECDF-S field (Mullaney+, 2016)
Byte-by-byte Description of file: nep.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Seq [1/33] Source Sequence
4- 17 A14 --- Name NuSTAR name (JHHMMSS+DDMM.m)
19- 32 E14.8 deg RAdeg NuSTAR detected Right Ascension (J2000)
34- 47 E14.8 deg DEdeg NuSTAR detected Declination (J2000)
48- 56 E9.4 --- ML3-24 ?=-99 3-24keV DET_ML (-99 if undetected)
58- 66 E9.4 ks Exp3-24 3-24keV vignetting-corrected exposure
68- 76 E9.4 ct ct3-24 3-24keV total counts in 20" radius
78- 87 E10.5 ct bkg3-24bl ?=-99 3-24keV deblended background counts
in 20" radius (-99 if undetected)
89- 98 E10.5 ct bkg3-24 3-24keV not deblended background counts
in 20" radius
100-110 E11.6 ct net3-24 3-24keV net counts in 20" radius (1)
112-120 E9.4 ct E_net3-24 ?=-99 3-24keV 1 sigma positive
net count error (2)
122-130 E9.4 ct e_net3-24 ?=-99 3-24keV 1 sigma negative
net count error (2)
132-139 E8.3 ct/s cts3-24 3-24keV count rate in 20" radius
141-148 E8.3 mW/m2 Flux3-24 3-24keV band aperture corrected flux
150-157 E8.3 mW/m2 E_Flux3-24 ?=-99 3-24keV band positive flux error (2)
159-166 E8.3 mW/m2 e_Flux3-24 ?=-99 3-24keV band negative flux error (2)
168-176 E9.4 --- ML3-8 ?=-99 3-8keV DET_ML (-99 if undetected)
178-186 E9.4 ks Exp3-8 3-8keV vignetting-corrected exposure
188-195 E8.3 ct ct3-8 3-8keV total counts in 20" radius
197-206 E10.5 ct bkg3-8bl ?=-99 3-8keV deblended background counts
in 20" radius (-99 if undetected)
208-217 E10.5 ct bkg3-8 3-8keV not deblended background counts
in 20" radius
219-228 E10.5 ct net3-8 3-8keV net counts in 20" radius (1)
230-238 E9.4 ct E_net3-8 ?=-99 3-8keV 1 sigma positive
net count error (2)
240-248 E9.4 ct e_net3-8 ?=-99 3-8keV 1 sigma negative
net count error (2)
250-257 E8.3 ct/s cts3-8 3-8keV count rate in 20" radius
259-266 E8.3 mW/m2 Flux3-8 3-8keV band aperture corrected flux
268-275 E8.3 mW/m2 E_Flux3-8 ?=-99 3-8keV band positive flux error (2)
277-284 E8.3 mW/m2 e_Flux3-8 ?=-99 3-8keV band negative flux error (2)
286-293 E8.3 --- ML8-24 ?=-99 8-24keV DET_ML (-99 if undetected)
295-303 E9.4 ks Exp8-24 8-24keV vignetting-corrected exposure
305-312 E8.3 ct ct8-24 8-24keV total counts in 20" radius
314-323 E10.5 ct bkg8-24bl ?=-99 8-24keV deblended background counts
in 20" radius (-99 if undetected)
325-334 E10.5 ct bkg8-24 8-24keV not deblended background counts
in 20" radius
336-345 E10.5 ct net8-24 8-24keV net counts in 20" radius (1)
347-355 E9.4 ct E_net8-24 ?=-99 8-24keV 1 sigma positive
net count error (2)
357-365 E9.4 ct e_net8-24 ?=-99 8-24keV 1 sigma negative
net count error (2)
367-374 E8.3 ct/s cts8-24 8-24keV count rate in 20" radius
376-383 E8.3 mW/m2 Flux8-24 8-24keV band aperture corrected flux
385-392 E8.3 mW/m2 E_Flux8-24 ?=-99 8-24keV band positive flux error (2)
394-401 E8.3 mW/m2 e_Flux8-24 ?=-99 8-24keV band negative flux error (2)
403-411 E9.4 --- ML8-16 ?=-99 8-16keV DET_ML (-99 if undetected)
413-421 E9.4 ks Exp8-16 8-16keV vignetting-corrected exposure
423-430 E8.3 ct ct8-16 8-16keV total counts in 20" radius
432-441 E10.5 ct bkg8-16bl ?=-99 8-16keV deblended background counts
in 20" radius (-99 if undetected)
443-452 E10.5 ct bkg8-16 8-16keV not deblended background counts
in 20" radius
454-463 E10.5 ct net8-16 8-16keV net counts in 20" radius (1)
465-473 E9.4 ct E_net8-16 ?=-99 8-16keV 1 sigma positive
net count error (2)
475-483 E9.4 ct e_net8-16 ?=-99 8-16keV 1 sigma negative
net count error (2)
485-492 E8.3 ct/s cts8-16 8-16keV count rate in 20" radius
494-501 E8.3 mW/m2 Flux8-16 8-16keV band aperture corrected flux
503-510 E8.3 mW/m2 E_Flux8-16 ?=-99 8-16keV band positive flux error (2)
512-519 E8.3 mW/m2 e_Flux8-16 ?=-99 8-16keV band negative flux error (2)
521-528 E8.3 --- ML16-24 ?=-99 16-24keV DET_ML (-99 if undetected)
530-538 E9.4 ks Exp16-24 16-24keV vignetting-corrected exposure
540-547 E8.3 ct ct16-24 16-24keV total counts in 20" radius
549-558 E10.5 ct bkg16-24bl ?=-99 16-24keV deblended background counts
in 20" radius (-99 if undetected)
560-569 E10.5 ct bkg16-24 16-24keV not deblended background counts
in 20" radius
571-579 E9.4 ct net16-24 16-24keV net counts in 20" radius (1)
581-589 E9.4 ct E_net16-24 ?=-99 16-24keV 1 sigma positive
net count error (2)
591-599 E9.4 ct e_net16-24 ?=-99 16-24keV 1 sigma negative
net count error (2)
601-608 E8.3 ct/s cts16-24 16-24keV count rate in 20" radius
610-617 E8.3 mW/m2 Flux16-24 16-24keV band aperture corrected flux
619-626 E8.3 mW/m2 E_Flux16-24 ?=-99 16-24keV band positive flux error (2)
628-635 E8.2 mW/m2 e_Flux16-24 ?=-99 16-24keV band negative flux error (2)
637-644 E8.2 --- HR Hardness ratio computed using BEHR
646-653 E8.2 --- B_HR Upper limit of hardness ratio
655-662 E8.2 --- b_HR . Lower limit of hardness ratio
664-677 E14.9 deg RASdeg ?=-1 Soft X-ray associate right ascension (3)
679-691 E13.8 deg DESdeg ?=-1 Soft X-ray associate declination (3)
693-700 E8.3 arcsec Sep ?=-1 NuSTAR to soft X-ray cp separation
702-709 E8.3 mW/m2 FluxXMM ?=-1 3-8keV flux from XMM-Newton
711-718 E8.3 mW/m2 e_FluxXMM []?=-1 3-8keV XMM-Newton flux
1 sigma error (2)
720-733 E14.9 deg RAOdeg ?=-1 Optical associate right ascension (3)
735-747 E13.8 deg DEOdeg ?=-1 Optical associate declination (3)
749-757 E9.4 mag imag ?=-1 i-band magnitude
759-760 I2 --- f_imag [0/1]?=-1 Flag of Optical i band magnitude
(0 = SDSS, 1 = HSC)
762-775 E14.9 deg RAMdeg ?=-1 MMIRS associate right ascension (3)
777-789 E13.8 deg DEMdeg ?=-1 MMIRS associate declination (3)
791-804 E14.9 deg RAWdeg ?=-1 WISE associate right ascension (3)
806-818 E13.8 deg DEWdeg ?=-1 WISE associate declination (3)
820-830 E11.6 --- zspec ?=-1 Spectroscopic redshift
832-839 E8.3 --- zphot ?=-1 Photometric redshift
841-851 E11.6 Mpc Ld ?=-1 Luminosity Distance
853-860 E8.3 10-7W L10-40 ?=-1 10-40keV rest-frame luminosity
862-869 E8.3 10-7W E_L10-40 ?=-1 10-40keV positive luminosity error
871-878 E8.3 10-7W e_L10-40 ?=-1 10-40keV negative luminosity error
880 I1 --- Flagms [0/1] Flag for sources with multiple low
energy counterparts (0 = false, 1 = true)
882 I1 --- Flagmo [0/1] Flag for sources with multiple optical
and IR counterparts (0 = false, 1 = true)
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Note (1): deblended if detected & above DET_ML threshold or 90 per cent
confidence upper limit if undetected or detected but below DET_ML threshold.
Note (2): -99 for upper limits.
Note (3): -1 if no counterpart
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Acknowledgements:
Xiurui Zhao, xiurui.zhao(at)cfa.harvard.edu
(End) Patricia Vannier [CDS] 10-Nov-2021