J/MNRAS/459/140 M81, LMC and 3C 273/Coma 17-60keV obs. (Mereminskiy+, 2016)
INTEGRAL/IBIS deep extragalactic survey: M81, LMC and 3C 273/Coma fields.
Mereminskiy I.A., Krivonos R.A., Lutovinov A.A., Sazonov S.Y.,
Revnivtsev M.G., Sunyaev R.A.
<Mon. Not. R. Astron. Soc., 459, 140-150 (2016)>
=2016MNRAS.459..140M 2016MNRAS.459..140M (SIMBAD/NED BibCode)
ADC_Keywords: Surveys ; Galaxy catalogs ; X-ray sources
Keywords: catalogues - surveys - X-rays: general
Abstract:
We present results of a deep survey of three extragalactic fields, M81
(exposure of 9.7Ms), Large Magellanic Cloud (6.8 Ms) and 3C 273/Coma
(9.3Ms), in the hard X-ray (17-60keV) energy band with the IBIS
telescope onboard the INTEGRAL observatory, based on 12 years of
observations (2003-2015). The combined survey reaches a 4σ
peak sensitivity of 0.18mCrab (2.6x10-12erg/s/cm2) and
sensitivity better than 0.25 and 0.87mCrab over 10 per cent and
90 per cent of its full area of 4900 deg2, respectively. We have
detected in total 147 sources at S/N>4σ, including 37 sources
observed in hard X-rays for the first time. The survey is dominated by
extragalactic sources, mostly active galactic nuclei (AGN). The sample
of identified sources contains 98 AGN (including 64 Seyfert galaxies,
seven low-ionization nuclear emission-line region galaxies, three
X-ray bright optically normal galaxies, 16 blazars and eight AGN of
unclear optical class), two galaxy clusters (Coma and Abell 3266), 17
objects located in the Large and Small Magellanic Clouds (13 high- and
two low-mass X-ray binaries and two X-ray pulsars), three Galactic
cataclysmic variables, one ultraluminous X-ray source (M82 X-1) and
one blended source (SWIFT J1105.7+5854). The nature of 25 sources
remains unknown, so that the survey's identification is currently
complete at 83 per cent. We have constructed AGN number-flux
relations (log N-log S) and calculated AGN number densities in the
local Universe for the entire survey and for each of the three
extragalactic fields.
Description:
For the current survey we used all publicly available data acquired
with INTEGRAL before 2015 June (spacecraft revolution 1553). The data
from ISGRI, the first detector layer of the IBIS telescope, were
utilized, as having the highest sensitivity at hard X-rays. We
selected 17-60keV as our working energy band where ISGRI has the
highest effective area.
We analysed the mosaic maps for positive excesses with S/N>4σ
and found 147 source candidates.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 149 147 List of the detected sources with S/N>4 in the
combined survey of three fields, M81, LMC and
3C 273/Coma
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See also:
J/ApJS/207/19 : Hard X-ray survey from Swift-BAT 2004-2010 (Baumgartner+, 2013)
J/ApJS/223/15 : 8yr INTEGRAL/IBIS soft gamma-ray source obs. (Bird+, 2016)
J/A+A/524/A64 : The 54-month Palermo BAT-survey catalogue (Cusumano+, 2010)
http://isdc.unige.ch/integral/catalog/39/catalog.html : INTEGRAL source catalog
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Field Field (M81, LMC or 3C 273/Coma)
13- 15 I3 --- Seq Sequential source number in the catalog
16 A1 --- n_Seq [*] Note for sources in spatial confusion (1)
18- 36 A19 --- Name Name (2)
38 A1 --- n_Name [*] Note for previously unknown sources
in 17-60keV band (3)
40- 46 F7.3 deg RAdeg Right ascension (J2000)
48- 54 F7.3 deg DEdeg Declination (J2000)
56- 60 F5.1 --- S/N Signal-to-noise ratio of the detected source
62- 66 F5.2 mCrab Flux Average source flux in 17-60keV band
68- 71 F4.2 mCrab e_Flux rms uncertainty on Flux
73- 76 F4.1 Mpc Dist ?=- Distance
78- 83 F6.4 --- z ? Redshift
85- 89 F5.2 [10-7W] logL ? Luminosity at 17-60keV band (4)
91-100 A10 --- Type Type (5)
102-149 A48 --- Notes Notes (6)
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Note (1): * for sources in spatial confusion.
The measured flux of these sources should be taken with the caution
Note (2): For sources previously detected in hard X-rays, we use their catalogue
or common name. We assign an "IGR" name for sources detected for the first
time.
Note (3): * for sources previously unknown in hard X-ray band (17-60keV).
Note (4): For the calculation of luminosities, we used the metric distance for
nearby sources (z≤0.01) and the luminosity distance estimated from the
redshift for the more distant sources. Distances and redshifts were obtained
from the SIMBAD and NED data bases.
We only calculated luminosities for sources classified as AGN; a standard
{LAMBDA}CDM cosmology with H0=67.8km/s/Mpc, {OMEGA}m=0.308 was used.
Note (5): Types as follows:
HMXB = high-mass X-ray binary
LMXB = low-mass X-ray binary
CV = cataclysmic variable
pulsar = rotation powered X-ray pulsar
cluster = cluster of galaxies
Sy1 = Seyfert galaxy of type 1
Sy2 = Seyfert galaxy of type 2
Sy1.2 = Seyfert galaxy of type 1.2
Sy1.5 = Seyfert galaxy of type 1.5
Sy1.8 = Seyfert galaxy of type 1.8
Sy1.9 = Seyfert galaxy of type 1.9
NLS1 = narrow-line Seyfert 1 galaxies
LINER = low-ionization nuclear emission-line region galaxy
LINER? = source classified as LINER based on optical observations but show
unusually high hard X-ray luminosities - more than 1043erg/s
XBONG = X-ray bright optically normal galaxy
blazar = BL Lac object or flat-spectrum radio quasar
NLRG = narrow emission-line radio-galaxy.
AGN = for all sources associated with galaxies but without known
activity type
Note (6): For known sources, we present an optical or IR counterpart name.
For sources detected for the first time, we specify the soft X-ray
counterpart and associated optical association. Some additional remarks are
also provided.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 12-Jun-2017