2011A&A...531A.123K


Query : 2011A&A...531A.123K

2011A&A...531A.123K - Astronomy and Astrophysics, volume 531A, 123-123 (2011/7-1)

Long-term optical variability of PKS 2155-304.

KASTENDIECK M.A., ASHLEY M.C.B. and HORNS D.

Abstract (from CDS):

The optical variability of the blazar PKS 2155-304 is investigated to characterise the red noise behaviour at largely different time scales from 20 days to O(>10yrs). The long-term optical light curve of PKS 2155-304 is assembled from archival data as well as from so-far unpublished observations mostly carried out with the ROTSE-III and the ASAS robotic telescopes. A forward folding technique is used to determine the best-fit parameters for a model of a power law with a break in the power spectral density function (PSD). The best-fit parameters are estimated using a maximum-likelihood method with simulated light curves in conjunction with the Lomb-Scargle periodogram and the first-order structure function (SF). In addition, a new approach based upon the so-called multiple fragments variance function (MFVF) is introduced and compared to the other methods. Simulated light curves have been used to confirm the reliability of these methods as well as to estimate the uncertainties of the best-fit parameters. The light curve is consistent with the assumed broken power-law PSD. All three methods agree within the estimated uncertainties with the MFVF providing the most accurate results. The red-noise behaviour of the PSD in frequency f follows a power law with f–β, β=1.8+0.1–0.2 and a break towards f0 at frequencies lower than fmin=(2.7+2.2–1.6yrs)–1.

Abstract Copyright:

Journal keyword(s): BL Lacertae objects: individual: PKS 2155-304 - methods: statistical - galaxies: photometry - accretion, accretion disks - galaxies: jets - black hole physics

VizieR on-line data: <Available at CDS (J/A+A/531/A123): phot.dat>

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 - 2021
#notes
1 QSO B2155-304 BLL 21 58 52.0651817803 -30 13 32.120657891   13.36 13.09 12.62   ~ 1610 1

    Equat.    Gal    SGal    Ecl

Query : 2011A&A...531A.123K

Basic data :
QSO B2155-304 -- 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:
gam (2AGL,3EG,...), X (2009A&A,2A,...), BLL (2010ApJ,SHBL,...), Rad (ICRF,IERS,...), Bla (2012ApJ,[DGT2001],...), QSO (2011MNRAS,QSO,...), Bz? (2019A&A,3HSP,...), IR (2MASS,WISEA,...), UV (2EUVE,EUVE,...), AGN (2011ApJ,CGRaBS), smm (JCMTSE,JCMTSF), V* (AAVSO), * (Gaia), G (2012A&A), cm (AT20G)
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) :
21 58 52.0651817803 -30 13 32.120657891 (Optical) [ 0.0315 0.0269 90 ] A 2018yCat.1345....0G
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) :
21 55 58.3501178263 -30 27 54.552516806 [ 0.0315 0.0269 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) :
017.7304968227655 -52.2458530378841 [ 0.0315 0.0269 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 :
-0.051 0.153 [0.056 0.054 90] A 2018yCat.1345....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) 32771 [600] / z(emission) 0.116 [0.002] / cz 34776 [600]
   D 2013MNRAS.435.1233G
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 13.36 [~] D 2010A&A...518A..10V
V 13.09 [~] D 2010A&A...518A..10V
R 12.62 [~] D 2008ApJS..175...97H
G 13.9053 [0.0303] C 2018yCat.1345....0G
J 11.398 [0.027] C 2003yCat.2246....0C
H 10.46 [0.01] B 2012AJ....144..112F
K 10.134 [0.023] 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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within 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!).
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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 (78) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

QSO B2155-304 3FHL J2158.8-3013 QSO B2155-3027 XSS J21583-3004
2A 2151-316 1H 2156-304 RBS 1807 9Y-MST J2158-3013
3A 2156-306 HESS J2158-302 2RE J2158-301 [BDW2002] q2155-3027
2AGL J2157-3015 H 2155-304 2RE J215852-301327 [DGT2001] B2155-304
AT20G J215852-301332 H 2154-304 RE J215852-301324 [FS2003] 1142
CGRaBS J2158-3013 H 2154-30 RE J2158-301 [HB93] 2155-304
2E 4544 3HSP J215852.0-301332 RORF 2155-304 [LBD96] J2155-304
2E 2155.9-3027 ICRF J215852.0-301332 RX J2158.8-3013 [MGL2009] BZB J2158-3013
3EG J2158-3023 IERS B2155-304 1RXS J215852.2-301338 [MML2015] 5BZB J2158-3013
EGR J2200-3015 INTREF 1064 SHBL J215852.0-301331 [QC93] 2155-304
1ES 2155-30.4 IVS B2155-304 SUMSS J215852-301326 [VV2000b] J215852.0-301332
2EUVE J2158-30.2 JCMTSE J215852.2-301332 TeV J2158-302 [VV2003b] J215852.0-301332
EUVE J2158-30.2 JCMTSF J215852.2-301332 TIC 229013191 [VV2006b] J215852.0-301332
0FGL J2158.8-3014 2MASS J21585206-3013321 TXS 2155-304 [VV2010b] J215852.0-301332
1FGL J2158.8-3013 NVSS J215852-301330 VLSS J2158.8-3013 [VV98b] J215852.0-301332
2FGL J2158.8-3013 PKS 2155-304 2WHSP J215852.0-301332 AAVSO 2153-30
3FGL J2158.8-3013 PKS J2158-3013 WISEA J215852.06-301332.0 Gaia DR1 6616660280724162688
4FGL J2158.8-3013 PKS 2155-30 WISE J215852.05-301332.0 Gaia DR2 6616660280724162688
1FHL J2158.8-3013 PMN J2158-3013 WISE J215852.06-301332.0
2FHL J2158.8-3013 QSO J2158-3013 2XMM J215852.0-301332

References (1610 between 1850 and 2021) (Total 1610)
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 : 6    PM : 2   

   

Observing logs


ISO : 42    IUE : 368    XMM : 13   

   


External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : QSO B2155-304

Link by name to the catalogue in VizieR :

2E 4544 3EG J2158-3023 EUVE J2158-30.2 IERS B2155-304 2MASS J21585206-3013321
NVSS J215852-301330 PKS 2155-304 PKS J2158-3013 PKS 2155-30 PMN J2158-3013
2RE J2158-301 2RE J215852-301327 1RXS J215852.2-301338 SUMSS J215852-301326 WISEA J215852.06-301332.0
WISE J215852.05-301332.0 WISE J215852.06-301332.0 Gaia DR1 6616660280724162688 Gaia DR2 6616660280724162688

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2021.07.27-07:30:35

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