2001MNRAS.324..628F

Query : 2001MNRAS.324..628F

2001MNRAS.324..628F - Mon. Not. R. Astron. Soc., 324, 628-634 (2001/July-1)

The blazar GB 1428+4217: a warm absorber at z=4.72.

FABIAN A.C., CELOTTI A., IWASAWA K. and GHISELLINI G.

Abstract (from CDS):

BeppoSAX observations of the high-redshift (z=4.72) blazar GB 1428+4217 confirm the presence of a complex soft X-ray spectrum first seen with the ROSAT PSPC. Flattening below a rest-frame energy of 5keV can be accounted for by absorption from an equivalent column density of (cold) gas with NH∼8x1022cm–2. Below 2keV a (variable) excess of a factor of ∼20 above the extrapolated absorbed spectrum is also detected. These findings are consistent with and extend to higher redshifts the correlation between increasing soft X-ray flattening and increasing z, previously pointed out for large samples of radio-loud quasars. We propose that such features, including X-ray absorption and soft excess emission as well as absorption in the optical spectra, can be satisfactorily accounted for by the presence of a highly ionized nuclear absorber with column NH∼1023cm–2, with properties possibly related to the conditions in the nuclear regions of the host galaxy. High-energy X-ray emission consistent with the extrapolation of the medium-energy spectrum is detected up to ∼300keV (rest frame).

Abstract Copyright: The Royal Astronomical Society

Journal keyword(s): galaxies: active - galaxies: individual: GB 1428+4217 - X-rays: galaxies

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 7C 1428+4218 QSO 14 30 23.74163471 +42 04 36.4910561   24.43 22.04 20.2   ~ 145 1

Query : 2001MNRAS.324..628F

Basic data :
7C 1428+4218 -- Quasar
Origin of the objects types :

(Ref) Object type as listed in the reference "Ref"
(acronym) Object type linked to the acronym according to the original reference
() Anterior to 2007, before we can link the objet type to a reference, or given by the CDS team in some particular cases

Other object types: 		Rad (2020A&A,7C,...), QSO (2010A&A,KODIAQ,...), X (2009A&A,RX,...), Bla (2009A&A,[DGT2001],...), AGN (2016A&A), * (Gaia), gam (INTREF), Opt (SDSS)
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
ICRS coord. (ep=J2000) : 		14 30 23.74163471 +42 04 36.4910561 (Radio) [ 0.0928551 0.1224 0 ] A 2020A&A...644A.159C
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
FK4 coord. (ep=B1950 eq=1950) : 		14 28 26.70630460 +42 17 53.0947745 [ 0.0928551 0.1224 0 ]
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
Gal coord. (ep=J2000) : 		075.86795825597 +64.89462143933 [ 0.0928551 0.1224 0 ]
Syntax of proper motions is : "pm-ra pm-dec [error ellipse] quality bibcode"
  • pm-ra : mu-ra*cos(dec) (expressed in the ICRS system in mas/yr)
  • pm-dec : mu-dec (expressed in the ICRS system in mas/yr)
  • [error ellipse] : error major axis and minor axis (in mas), orientation angle (in deg)
  • quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality)
  • bibcode : bibcode of the proper motion reference
Proper motions mas/yr : 		1.437 -2.754 [0.909 1.105 90] A 2020yCat.1350....0G
Syntax of radial velocity (or/and redshift) is : "value [error] (wavelength) quality bibcode"
  • value : radial velocity or/and redshift (Heliocentric frame) according to your Output Options
    (redshift may be not displayed if the data value is <0 and the database inside value is a radial velocity)
  • [error] : error of the corresponding value displayed before
  • (wavelength) : wavelength range of the measurement : Rad, mm, IR, Opt, UV, Xray, Gam or  '∼'(unknown)
  • quality : flag of quality ( A=best quality -> E=worst quality, ∼=unknown quality)
  • bibcode : bibcode of the value's origin
Radial velocity / Redshift / cz : 		V(km/s) 281620 [132] / z(spectroscopic) 4.65633 [0.00044] / cz 1395932.6 [131.9]
   (Opt) C 2015ApJS..219...12A
Syntax of parallax is : 'value quality [error] bibcode'
  • value : parallax value
  • quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality)
  • [error] : mean error
  • bibcode : bibcode of the parallax reference
Parallaxes (mas): 		0.2927 [0.9397] A 2020yCat.1350....0G
Syntax of fluxes (or magnitudes) is : "filter-name (System) flux-value [error] quality MultVarFlags bibcode"
  • filter-name : U, B, V, R, I, G, J, H, K, u, g, r, i, z
  • (System) : may be AB (default is Vega)
  • flux-value : value of flux or magnitude
  • [error] : error value
  • quality : flag of quality of the flux value ( A=best quality -> E=worst quality, {� } =unknown quality)
  • MultVarFlags : Mult is zero or one char (J) for joined photometry ; Var can be zero or two chars (V[0-4])
  • bibcode : bibcode of the flux reference
Fluxes (9) :
B 24.43 [~] D 2010A&A...518A..10V
V 22.04 [~] D 2010A&A...518A..10V
R 20.2 [~] E 2009A&A...495..691M
G 20.800926 [0.014700] C 2020yCat.1350....0G
u (AB) 24.120 [0.53] D 2014A&A...563A..54P
g (AB) 23.3051 [0.1350] D 2020ApJS..250....8L
r (AB) 20.9920 [0.0348] C 2020ApJS..250....8L
i (AB) 19.1603 [0.0223] C 2020ApJS..250....8L
z (AB) 19.3294 [0.0456] C 2020ApJS..250....8L
SIMBAD within arcmin
', {sourceSize:12, color:'#30a090'})); aladin.on('objectClicked', function(object) { var objName=object.data.MAIN_ID; aladin.showPopup(object.ra,object.dec,'',''+ objName+''); });" title="Show Simbad objects"> Overlay Simbad points in this preview
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The search radius has to be specified by the user. It is currently limited to a maximum of 30 arcsec. It depends mostly on the precision or quality of the coordinates (SIMBAD and VizieR catalogs), the resolution of the images from which the sources were extracted, source extent, and source crowding.
Suggestions are: crowded field: 0.5 to 1.5 arcsec, 3 arcsec otherwise; uncertain coordinates (SIMBAD quality E or coordinates without reference): 5 to 30 arsec (risky!). sed-help-icon
Some important notes on this object about identifications and objects associations.
notes:

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (50) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

7C 1428+4218 IERS B1428+422 1RXS J143023.7+420428 [MGL2009] BZQ J1430+4205
B3 1428+422 INTREF 611 SDSS J143023.74+420436.5 [MGL2009] BZQ J1430+4204
BWE 1428+4218 IVS B1428+422 SDSS J143023.74+420436.4 [MML2015] 5BZQ J1430+4204
7C 142826.80+421756.00 JVAS J1430+420 SDSS J143023.73+420436.5 [VV2000] J143023.7+420437
CLASS B1428+422 JVAS J1430+4204 TGSSADR J143023.7+420436 [VV2003] J143023.7+420437
CLASS J143023.7408+420436.497 JVAS B1428+422 TXS 1428+422 [VV2006] J143023.7+420437
CRATES J143023+420450 KODIAQ J143023+420436 VIPS J14303+4204 [VV2010] J143023.7+420437
FIRST J143023.7+420436 NVSS J143023+420436 WB 1428+4218 [VV98] J143023.7+420437
GB6 J1430+4204 QSO B1428+4217 WN B1428.4+4217 Gaia DR2 1491604311829975296
GB6 B1428+4217 RGB J1430+420 2XMM J143023.7+420436 Gaia DR3 1491604311829975296
GB6 B1428+4218 RGB J1430.4+4204 3XMM J143023.7+420436 Gaia DR1 1491604311829975296
87GB 142825.9+421804 RX J1430.3+4203 [BSF97] J143023.74+420436.5
ICRF J143023.7+420436 RX J1430.4+4204 [DGT2001] B1428+422

References (145 between 1850 and 2024) (Total 145)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements


velocities : 10    PLX : 2    PM : 3   

   

Observing logs


ISO : 1    XMM : 2   

   

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : 7C 1428+4218

Link by name to the catalogue in VizieR :

BWE 1428+4218 FIRST J143023.7+420436 IERS B1428+422 NVSS J143023+420436 1RXS J143023.7+420428
SDSS J143023.74+420436.5 SDSS J143023.74+420436.4 SDSS J143023.73+420436.5 WN B1428.4+4217 Gaia DR2 1491604311829975296
Gaia DR3 1491604311829975296 Gaia DR1 1491604311829975296

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