1998A&AS..129..577T

Query : 1998A&AS..129..577T

1998A&AS..129..577T - Astron. Astrophys., Suppl. Ser., 129, 577-582 (1998/May-1)

Monitoring of AO 0235+164 during a faint state.

TAKALO L.O., SILLANPAEAE A., VALTAOJA E., KATAJAINEN S., NILSSON K., PURSIMO T., HEINAEMAEKI P., VILLATA M., RAITERI C.M., GHISELLINI G., DE FRANCESCO G., LANTERI L., CHIABERGE M., PEILA A., BOLTWOOD P., TOSTI G., FIORUCCI M., TERAESRANTA H., TORNIKOSKI M. and TEERIKORPI P.

Abstract (from CDS):

We present the results of the optical and radio monitoring of the BL Lac object AO 0235+164 during a faint state. In both optical and radio bands the source has been observed at the faintest ever recorded levels, reaching V=19.80 and F22GHz=0.34Jy. In the optical bands we still see variability with amplitudes up to 1.5 magnitudes on timescales from days to weeks. The radio variability is less dramatic, but in general follows the optical behaviour. A correlation between general trends in the optical and radio behaviour of AO 0235+164 may be recognized in the data from the present monitoring as well as in the historical light curves, suggesting a ``base'' mechanism responsible for the emission at both frequencies. A good candidate is a synchrotron process in the relativistic jet. Optical flares with no corresponding radio counterparts have been observed too. These events may be interpreted in terms of microlensing by a foreground galaxy.

Abstract Copyright: ∼

Journal keyword(s): Bl lac objects: general - gravitational lensing - AO 0235+164

VizieR on-line data: <Available at CDS (J/A+AS/129/577): table2.dat table2.tex>

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 QSO B0235+1624 BLL 02 38 38.93010450 +16 36 59.2745528   16.46 15.50 15.92   ~ 1544 2

Query : 1998A&AS..129..577T

Basic data :
QSO B0235+1624 -- BL Lac
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 (2010AJ,AO,...), gam (2EG,3EG,...), QSO (2008ApJS,QSO,...), Bla (2013ApJS,[DGT2001],...), BLL (2010ApJ,[VV98b]), AGN (2011AJ,CGRaBS,...), X (2009A&A,1A,...), V* (2018AJ,AAVSO), MIR (WISEA,WISE), IR (IRAS,2MASSI), BL? (2021MNRAS), Bz? (2022ApJS), G (LEDA), * (Gaia), NIR (2MASS), Opt (ATO)
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) : 		02 38 38.93010450 +16 36 59.2745528 (Radio) [ 0.030472 0.0308 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) : 		02 35 52.63530480 +16 24 03.9157449 [ 0.030472 0.0308 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) : 		156.77073648953 -39.10947612504 [ 0.030472 0.0308 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 : 		-0.001 -0.093 [0.149 0.109 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) 173924 [~] / z(emission) 0.94 [~] / cz 281805 [~]
   (Opt) C 2017AJ....154..114O
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): 		0.0000115 0.0000052 -5 (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 (7) :
B 16.46 [~] D 2010A&A...518A..10V
V 15.50 [~] D 2010A&A...518A..10V
R 15.92 [~] D 2008ApJS..175...97H
G 17.397629 [0.034322] C 2020yCat.1350....0G
J 15.317 [0.050] C 2003yCat.2246....0C
H 14.104 [0.046] C 2003yCat.2246....0C
K 13.233 [0.034] C 2003yCat.2246....0C
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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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 (98) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

QSO B0235+1624 GeV J0237+1648 PCCS2 143 G156.77-39.10 9Y-MST J0238+1637
1A 0235+164 GLEAM J023838+163702 PKS 0235+164 [BBC96] 12
AO 0235+16 ICRF J023838.9+163659 PKS 0235+16 [CAB95] IRAS F02358+1623
ATO J039.6622+16.6164 IERS B0235+164 PKS J0238+1636 [DGT2001] B0235+164
BWE 0235+1624 INTREF 120 QSO J0238+1637 [GGR94] 0235+164
CGRaBS J0238+1636 IRAS F02358+1623 QSO B0235+164 [GR92] 0235+164
1E 0235.8+1624 IVS B0235+164 QSO B0235+16 [HB93] 0235+164
2E 0235.8+1624 JVAS J0238+1636 QSO J0238+1636 [IN88] 0235+164
2E 618 JVAS B0235+164 RORF 0235+164 [LBD96] J0238+1657
2EG J0238+1657 1Jy 0235+16 S2 0235+16 [MGL2009] BZB J0238+1636
3EG J0237+1635 1Jy 0235+164 SQUAD DR1 J023838+163659 [MML2015] 5BZB J0238+1636
EGR J0238+1659 KODIAQ J023838+163659 TGSSADR J023838.8+163700 [P82] 0235+164
1ES 0235+16.4 LEDA 2823185 TIC 388976514 [VV2000] J023838.9+163700
0FGL J0238.6+1636 MASIV J0238+1636 TXS 0235+164 [VV2000c] J023838.9+163658
1FGL J0238.6+1637 2MASS J02383892+1636592 VLSSr J023838.6+163703 [VV2003] J023838.9+163700
2FGL J0238.7+1637 2MASSI J0238389+163659 VLSS J0238.6+1637 [VV2006] J023838.9+163700
3FGL J0238.6+1636 MC3 0235+16.4 VSOP J0238+1636 [VV2010] J023838.9+163700
4FGL J0238.6+1637 MITG J0238+1636 VSOP J0238+1637 [VV2010c] J023838.9+163658
1FHL J0238.7+1639 MITG J023839+1636 WB 0235+1624 [VV98b] J023838.9+163700
2FHL J0238.8+1631 MRC 0235+164 WISEA J023838.93+163659.2 [VV98c] J023838.9+163658
3FHL J0238.6+1637 NAICGB 0235+164 WISE J023838.92+163659.4 AAVSO 0233+16
1FLE J0238+1638 NEWPS5 J0238+1637 WISE J023838.93+163659.2 Gaia DR3 81603794508719872
GB6 J0238+1637 NVSS J023838+163658 WMAP J0238+1637 Gaia DR1 81603794508719872
GB6 B0235+1624 OHIO D 160 WMAP J0238+1636
87GB 023552.1+162405 PCCS1 030 G156.86-39.13 WMAP J0238+1634

References (1544 between 1850 and 2024) (Total 1544)
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 : 9    V* : 1    PM : 1   

   

Observing logs


herschel : 53    ISO : 7    XMM : 3   

   

External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : QSO B0235+1624

Link by name to the catalogue in VizieR :

BWE 0235+1624 2E 618 3EG J0237+1635 IERS B0235+164 IRAS F02358+1623
2MASS J02383892+1636592 2MASSI J0238389+163659 MITG J0238+1636 MITG J023839+1636 NVSS J023838+163658
PKS 0235+164 PKS 0235+16 PKS J0238+1636 VSOP J0238+1636 VSOP J0238+1637
WISEA J023838.93+163659.2 WISE J023838.92+163659.4 WISE J023838.93+163659.2 WMAP J0238+1637 WMAP J0238+1636
WMAP J0238+1634 Gaia DR3 81603794508719872 Gaia DR1 81603794508719872

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