J/MNRAS/470/512 INTEGRAL 14-year Galactic hard X-ray sources (Krivonos+, 2017)
New hard X-ray sources discovered in the ongoing INTEGRAL Galactic plane survey
after 14 yr of observations.
Krivonos R.A., Tsygankov S.S., Mereminskiy I.A., Lutovinov A.A.,
Sazonov S.Y., Sunyaev R.A.
<Mon. Not. R. Astron. Soc., 470, 512-516 (2017)>
=2017MNRAS.470..512K 2017MNRAS.470..512K (SIMBAD/NED BibCode)
ADC_Keywords: Surveys ; X-ray sources ; Gamma rays
Mission_Name: INTEGRAL
Keywords: surveys - X-rays: general
Abstract:
The International Gamma-Ray Astrophysics Laboratory (INTEGRAL)
continues to successfully work in orbit after its launch in 2002. The
mission provides the deepest ever survey of hard X-ray sources
throughout the Galaxy at energies above 20keV. We report on a
catalogue of new hard X-ray source candidates based on the latest sky
maps comprising 14yr of data acquired with the IBIS telescope onboard
INTEGRAL in the Galactic Plane (|b|<17.5°). The current catalogue
includes in total 72 hard X-ray sources detected at S/N>4.7σ and
not known to previous INTEGRAL surveys. Among them, 31 objects have
also been detected in the on-going all-sky survey by the BAT telescope
of the Swift observatory. For 26 sources on the list, we suggest
possible identifications: 21 active galactic nuclei, two cataclysmic
variables, two isolated pulsars or pulsar wind nebulae and one
supernova remnant; 46 sources from the catalogue remain unclassified.
Description:
For this work, we selected all publicly available INTEGRAL data from
2002 December to 2017 March (spacecraft revolutions 26-1790).
In total, we obtained 124 727 ScW images covering the whole sky,
comprising ∼220Ms of the effective (dead time-corrected) exposure. For
the purposes of this work we selected 79234 ScWs (∼130Ms) within the
GP (|b|<17.5°). Following Krivonos et al. (2012, Cat.
J/A+A/545/A27) we constructed six overlapping 70°x35°
Cartesian projections centred at the GP (|b|=0°) and Galactic
longitudes l=0°, ±50°, ±115° and l=180°.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
catalog.dat 183 72 The catalogue of hard X-ray sources (table 2)
refs.dat 67 16 References
list.dat 162 24 List of 70°x36° sky mosaics maps
fits/* . 24 Individual fits maps
--------------------------------------------------------------------------------
See also:
J/A+A/545/A27 : INTEGRAL/IBIS 9-year Galactic hard X-ray survey
(Krivonos+, 2012)
Byte-by-byte Description of file: catalog.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- Seq [1/72] Running number
4- 14 A11 --- Name INTEGRAL (IGR) object name
16- 22 F7.3 deg RAdeg Right Ascension (J2000)
24- 30 F7.3 deg DEdeg Declination (J2000)
32- 35 F4.2 10-14W/m2 Flux 17-60keV flux (10-11erg/s/cm2)
37- 40 F4.2 10-14W/m2 e_Flux 17-60keV 1 σ flux error
(10-11erg/s/cm2)
42- 45 F4.1 --- snr Signal-to-noise ratio
47 I1 --- noise [0/1] Systematic noise (1)
49- 55 A7 --- Type Source astrophysical type (2)
57- 63 A7 --- r_Type Reference for the category of the source
in refs.dat file
65- 85 A21 --- Hard Hard X-ray/gamma counterpart
87-131 A45 --- Soft Soft X-ray counterpart
133-183 A51 --- OptIR Optical/IR counterpart
--------------------------------------------------------------------------------
Note (1): The source is located in the region of high systematic noise, and its
measured flux should be treated with caution (noise=1).
Note (2): General astrophysical type of the object as follows:
AGN = active galactic nucleus
SNR/PWN = supernova remnant/pulsar wind nebula
CV = cataclysmic variable
PSR = isolated pulsar or pulsar wind nebula
The question mark indicates that the specified type is not firmly determined,
so it should be confirmed.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: refs.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- Ref Reference number
4- 22 A19 --- BibCode BibCode
24- 41 A18 --- Aut Author's name
44- 67 A24 --- Com Comments
--------------------------------------------------------------------------------
Byte-by-byte Description of file: list.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 keV Band Energy band (low-high)
7- 12 F6.1 deg GLON Region Galactic longitude
14- 18 F5.1 deg GLAT [0] Region Galactic latitude
20- 23 I4 --- Nx Number of pixels along X-axis
25- 27 I3 --- Ny Number of pixels along Y-axis
29- 33 I5 Kibyte size Size of FITS file
35- 56 A22 --- FileName Name of the FITS file in subdirectory fits
58-162 A105 --- Title Title of the FITS file (1)
--------------------------------------------------------------------------------
Note (1): 1mCrab=1.43nW/m2=1.43*10-11erg/s/cm2.
--------------------------------------------------------------------------------
Acknowledgements:
Roman Krivonos, krivonos(at)iki.rssi.ru
Based on observations with INTEGRAL, an ESA project with instruments
and science data centre funded by ESA member states (especially the PI
countries: Denmark, France, Germany, Italy, Switzerland, Spain), Czech
Republic, and Poland, and with the participation of Russia and the USA
(End) Patricia Vannier [CDS] 22-Jan-2018