J/ApJ/570/100 BeppoSAX HELLAS survey. V. (La Franca+, 2002)
The BeppoSAX High-Energy Large-Area Survey.
V. The nature of the hard X-ray source population and its evolution.
La Franca F., Fiore F., Vignali C., Antonelli A., Comastri A., Giommi P.,
Matt G., Molendi S., Perola G.C., Pompilio F.
<Astrophys. J. 570, 100 (2002)>
=2002ApJ...570..100L 2002ApJ...570..100L
ADC_Keywords: X-ray sources ; Active gal. nuclei ; QSOs ; Redshifts ;
Spectroscopy
Mission_Name: BeppoSAX
Keywords: cosmology: observations - galaxies: active -
galaxies: distances and redshifts - galaxies: evolution -
quasars: general
Abstract:
We present optical spectroscopic identifications of hard X-ray
(5-10keV) selected sources belonging to the High-Energy Large-Area
Survey sample obtained with BeppoSAX down to a 5-10keV flux limit of
F(5-10kev)∼3x10-14erg/cm2/s. The sample consists of 118 sources.
There are 25 sources that have been identified through correlations
with catalogs of known sources. A spectroscopic identification for 49
more has been searched for with the telescope. The results of 13
fields were empty down to R=21. There were 37 sources identified as
type 1 active galactic nuclei (AGNs) and nine as type 2 AGNs. The
remaining sources are five narrow emission-line galaxies, six
clusters, two BL Lac objects, one radio galaxy, and one star.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 81 61 Identified hard X-ray sources in the HELLAS catalog
table4.dat 26 13 Empty fields in the HELLAS catalog
table5.dat 62 99 Emission line measurements
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See also:
J/A+A/362/799 : The BeppoSAX 2-10 keV Survey (Giommi+, 2000)
J/MNRAS/327/771 : BeppoSAX HELLAS survey. II. (Fiore+, 2001)
J/A+A/370/900 : BeppoSAX HELLAS survey. IV (Vignali+, 2001)
J/MNRAS/342/575 : BeppoSAX HELLAS survey. VI. (Ciliegi+, 2003)
J/A+A/409/79 : HELLAS2XMM survey. IV. (Fiore+, 2003)
http://argos.mporzio.astro.it/hellas/ :
The High Energy Large Area Survey (HELLAS) Home Page
Table 2: Observing Log
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Date Telescope
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1998 Dec 28: 3 nights ESO/3.6 m EFOSC2
1999 Jun 8: 3 nights ESO/3.6 m EFOSC2
2000 Jan 3: 3 nights ESO/3.6 m EFOSC2
2000 Jul 29: 3 nights ESO/3.6 m EFOSC2
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh BeppoSax right ascension (J2000.0)
4- 5 I2 min RAm BeppoSax right ascension (J2000.0)
7- 10 F4.1 s RAs BeppoSax right ascension (J2000.0)
12 A1 --- DE- BeppoSax Declination sign (J2000)
13- 14 I2 deg DEd BeppoSax declination (J2000.0)
16- 17 I2 arcmin DEm BeppoSax declination (J2000.0)
19- 20 I2 arcsec DEs BeppoSax declination (J2000.0)
23- 24 I2 h RAoh Optical right ascension (J2000.0)
26- 27 I2 min RAom Optical right ascension (J2000.0)
29- 32 F4.1 s RAos Optical right ascension (J2000.0)
34 A1 --- DEo- Optical Declination sign (J2000)
35- 36 I2 deg DEod Optical declination (J2000.0)
38- 39 I2 arcmin DEom Optical declination (J2000.0)
41- 42 I2 arcsec DEos Optical declination (J2000.0)
44- 46 I3 arcsec DXO Difference between X-ray and optical positions
48- 49 I2 arcsec Offx Offaxis
51- 54 F4.1 10-16W/m2/s FX Flux at 5-10keV
56- 59 F4.1 mag Rmag ? R magnitude
61- 72 A12 --- Type Spectroscopic identification
73 A1 --- n_Type [de] Note on Type (1)
75- 79 F5.3 --- z Redshift
80 A1 --- n_z [abc] Note on Redshift (2)
81 A1 --- Note [*] *: cross-correlation with existing catalogs
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Note (1): Note on Type:
d: Also possible AGN 1: Hβ has a rest frame FWHM∼1000km/s
e: Quite a noisy spectrum. Hβ has a rest frame FWHM∼1500km/s
Note (2): Note on Redshfit:
a: From Colafrancesco et al., 2000A&AS..144..187C 2000A&AS..144..187C
b: From Gorosabel et al., 1998A&A...339..719G 1998A&A...339..719G, misidentified in
Fiore et al., 2000NewA....5..143F 2000NewA....5..143F.
c: Wrong coordinates and magnitudes in Fiore et al.,
1999MNRAS.306L..55F 1999MNRAS.306L..55F
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh BeppoSax right ascension (J2000.0)
4- 5 I2 min RAm BeppoSax right ascension (J2000.0)
7- 10 F4.1 s RAs BeppoSax right ascension (J2000.0)
12 A1 --- DE- BeppoSax Declination sign (J2000)
13- 14 I2 deg DEd BeppoSax declination (J2000.0)
16- 17 I2 arcmin DEm BeppoSax declination (J2000.0)
19- 20 I2 arcsec DEs BeppoSax declination (J2000.0)
23- 26 F4.2 10-16W/m2/s FX Flux at 5-10keV
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1 A1 --- --- [H]
2- 14 A13 --- Name HELLAS name (Hhhmmss+ddmmss)
16- 20 F5.3 --- z Redshift
22- 25 A4 --- Type EW, FWHM or FWZI measure (1)
27- 31 F5.1 0.1nm MgII ? MgII measurement (2)
32 A1 --- n_MgII [a] a: CIV line instead of MgII line
33- 37 F5.1 0.1nm OII ? OII measurement (2)
39- 43 F5.1 0.1nm Hbeta ? Hbeta measurement (2)
45- 49 F5.1 0.1nm OIII ? OIII measurement (2)
51- 55 F5.1 0.1nm Ha+NII ? Hα+NII measurement (2)
57- 60 F4.1 0.1nm SII ? SII measurement (2)
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Note (1): Type of measure:
EW: Equivalent width
FWHM: Full width half maximum
FWZI: Full width at zero intensity
Note (2): Observed frame. Negative values correspond to absorption lines
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History:
From electronic version of the journal
References:
Fiore et al., Paper I 1999MNRAS.306L..55F 1999MNRAS.306L..55F
Fiore et al., Paper II 2001MNRAS.327..771F 2001MNRAS.327..771F, Cat. J/MNRAS/327/771
Comastri et al., Paper III 2001MNRAS.327..781C 2001MNRAS.327..781C
Vignali et al., Paper IV 2001A&A...370..900V 2001A&A...370..900V, Cat. J/A+A/370/900
(End) James Marcout, Patricia Bauer [CDS] 21-Jun-2002