CDS

2010A&A...517A..63T

C.D.S. - SIMBAD4 rel 1.7 - 2020.07.11CEST11:41:06

2010A&A...517A..63T - Astronomy and Astrophysics, volume 517, A63-63 (2010/7-1)

Colour behaviour of the blazar PKS 0735+178 in 1994-2004.

TAKALO L.O., HAGEN-THORN V.A., HAGEN-THORN E.I., CIPRINI S. and SILLANPAEAE A.

Abstract (from CDS):

The properties of variable sources responsible for blazar activity are still under discussion. Some conclusions can be drawn from analyzing monitoring observations. The results of multicolour monitoring observations of the blazar PKS 0735+178 are used to study the colour behaviour of the variable source responsible for the blazar activity in 1994-2004. The method of ``flux-flux'' diagrams is used to find the SED of the variable source. The SED of the variable source was unchanged on timescales of years and is represented well by a power-law. High observed polarization and power-law spectrum point to the synchrotron nature of the variable source. The achromatic variability can then be explained by variations in the Doppler boosting due to ∼10°-variations in the angle between the line of sight and the velocity direction of the radiating source. There is no doubt about the synchrotron nature of the variable source. The most probable reason for this variability is the change in the Doppler boosting.

Abstract Copyright: ∼

Journal keyword(s): BL Lacertae objects: general - BL Lacertae objects: individual: PKS 0735+178 - techniques: photometric

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 - 2020 		#notes
1 QSO J0738+1742 BLL 07 38 07.39374766 +17 42 18.9982302   16.76 16.22 15.78   ~ 896 1

    Equat.    Gal    SGal    Ecl

C.D.S. - SIMBAD4 rel 1.7 - 2020.07.11CEST11:41:06

Available data : Basic data  •  Identifiers  •  Plot & images  •  Bibliography  •  Measurements  •  External archives  •  Notes  •  Annotations

Basic data :
QSO J0738+1742 -- BL Lac - type object
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 (Ref,BWE,...), BLL (Ref,2011NewA...16..503M,...), gam (2EG,3EG,...), X (Ref,1AXG,...), Bla (Ref,[DGT2001],...), QSO (Ref,QSO,...), IR (IRAS,2MASS,...), * ([SZK2001],Gaia), AGN (Ref,CGRaBS), V* (AAVSO), G (LEDA), UV (PG)
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) : 		07 38 07.39374766 +17 42 18.9982302 (Radio) [ 0.0422 0.0437 90 ] A 2015AJ....150...58F
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) : 		07 35 14.12874928 +17 49 09.3184304 [ 0.0422 0.0437 90 ]
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) : 		201.84647061326 +18.07057939136 [ 0.0422 0.0437 90 ]
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 : 		-0.01252 0.00503 [0.00375 0.00302 90] ~ 2017ApJS..233....3T
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) 106534 [~] / z(spectroscopic) 0.45 [~] / cz 134907 [~]
   (Opt) D 2017ApJS..233....3T
Syntax of angular size is : "maj-axis min-axis angle (wtype) quality bibcode"
  • maj-axis : major axis size (arc minutes)
  • min-axis : minor axis size (arc minutes)
  • angle : orientation angle (in degrees)
  • (wtype) : wavelength class for the origin of the angular size (Rad, mm, IR, Opt, UV, Xray, Gam)
  • quality : flag of quality of the angular size values ( A=best quality -> E=worst quality, {� } =unknown quality)
  • bibcode : bibcode of the angular size reference
Angular size (arcmin): 		0.0000112 0.0000052 -10 (Rad) D 2010AJ....139.1713C
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 (12) :
B 16.76 [~] D 2010A&A...518A..10V
V 16.22 [~] D 2010A&A...518A..10V
R 15.78 [~] D 2008ApJS..175...97H
G 15.838 [~] D 2016A&A...595A...1G
J 14.732 [0.034] C 2003yCat.2246....0C
H 13.919 [0.044] C 2003yCat.2246....0C
K 13.025 [0.032] C 2003yCat.2246....0C
u (AB) 16.454 [0.006] B 2009yCat.2294....0A
g (AB) 15.926 [0.004] B 2009yCat.2294....0A
r (AB) 15.501 [0.004] B 2009yCat.2294....0A
i (AB) 15.175 [0.004] B 2009yCat.2294....0A
z (AB) 14.875 [0.005] B 2009yCat.2294....0A
SIMBAD with radius arcmin
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within radius arcsec The VizieR photometry tool allows for easy visualization of photometry points extracted around the Simbad position from photometry-enabled catalogues in VizieR.
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!).
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 (81) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

QSO J0738+1742 IERS B0735+178 PKS 0735+178 WISE J073807.39+174219.0
1AXG J073807+1741 INTREF 331 PKS J0738+1742 [CAB95] IRAS F07352+1749
BWE 0735+1749 IRAS F07352+1749 PKS 0735+17 [DGT2001] B0735+178
CGRaBS J0738+1742 IVS B0735+178 QSO J0738+17 [GGR94] 0735+178
Cul 0735+178 JVAS J0738+1742 QSO B0735+1749 [GR92] 0735+178
DA 237 JVAS B0735+178 QSO B0735+17 [HB93] 0735+178
2E 1843 1Jy 0735+178 QSO B0735+178 [IN88] 0735+178
2E 0735.2+1749 1Jy 0735+17 RGB J0738.1+1742 [MGL2009] BZB J0738+1742
2EG J0737+1725 LEDA 2825195 RGB J0738+177 [MML2015] 5BZB J0738+1742
3EG J0737+1721 MASIV J0738+1742 RORF 0735+178 [P82] 0735+178
EGR J0737+1720 2MASS J07380740+1742189 RX J0738.1+1742 [SZK2001] J073807.37+174219.0
1ES 0735+17.8 MITG J0738+1742 1RXS J073808.0+174224 [VV2000b] J073807.4+174219
0FGL J0738.2+1738 MITG J073807+1742 S3 0735+17 [VV2003b] J073807.4+174219
1FGL J0738.2+1741 MITG J073806+1742 S4 0735+17 [VV2006b] J073807.4+174219
2FGL J0738.0+1742 MRC 0735+178 SDSS J073807.39+174218.9 [VV2010b] J073807.4+174219
3FGL J0738.1+1741 NAICGB 0735+178 TXS 0735+178 [VV98b] J073807.4+174219
1FHL J0738.0+1742 NAIC 0735+178 UT 0735+178 AAVSO 0732+17
3FHL J0738.1+1742 NRAO 0735+17 VLSS J0738.1+1742 Gaia DR1 671322423659881088
GB6 B0735+1749 NVSS J073807+174219 VRO 17.07.02
87GB 073514.7+174917 OHIO I 158 VSOP J0738+1742
ICRF J073807.3+174218 PG 0735+17 WB 0735+1749

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References (896 between 1850 and 2020) (Total 896)
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 : 4    PM : 1   

   

Observing logs


ISO : 3    IUE : 14   

   

External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : QSO J0738+1742

Link by name to the catalogue in VizieR :

BWE 0735+1749 2E 1843 3EG J0737+1721 IERS B0735+178 IRAS F07352+1749
2MASS J07380740+1742189 MITG J0738+1742 MITG J073807+1742 MITG J073806+1742 NVSS J073807+174219
PG 0735+17 PKS 0735+178 PKS J0738+1742 PKS 0735+17 1RXS J073808.0+174224
SDSS J073807.39+174218.9 VSOP J0738+1742 WISE J073807.39+174219.0 Gaia DR1 671322423659881088

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2020.07.11-11:41:06

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