VizieR

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VizieR

Simple TargetList Of TargetsFast Xmatch with large catalogs or Simbad
Target Name (resolved by Sesame) or Position:
 Target dimension:
NB: The epoch used for the query is the original epoch of the table(s)Radius Box size

  
J/AJ/137/5022
  Variability of radio-bright BL Lac objects (Nieppola+, 2009)
ReadMe+ftp
2009AJ....137.5022N
Similar Catalogs
Post annotation 		img(gal)
1.J/AJ/137/5022/table1(c)The source sample of 24 BLOs (24 rows)
2.J/AJ/137/5022/table2The most significant timescales obtained for the sample sources using the structure function, the discrete correlation function and the Lomb-Scargle periodogram (128 rows)

Simple ConstraintList Of Constraints
 
Query by Constraints constraints help applied on Columns (Output Order: + - )
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Column  Constraint Explain   (UCD)
  (ALL)recno  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)
   (ALL)Source (char) (i) Source name (HHMM+DDMM) (meta.id;meta.main)
   (ALL)OName (char) Other name (meta.id)
  (1)RAJ2000 "h:m:s" (i) Right ascension (J2000) (pos.eq.ra;meta.main)
  (1)DEJ2000 "d:m:s" (i) Declination (J2000) (pos.eq.dec;meta.main)
  (1)z  (n) Redshift (src.redshift)
  (1)r_z  (n) Redshift reference (Note 2)   (meta.ref;pos.frame)
  (1)Dvar  (n) Doppler boosting factor of the source taken from Hovatta et al. (2009A&A...494..527H) (arith.factor;spect.dopplerParam)
  (1)Class (char) [HILBL] BLO class (High, Intermediate or Low energy-peaked BL Lac) according to Nieppola et al. (2006, Cat. J/A+A/445/441) (src.class)
  (1)Flare (char) [*] Flare analysis (Note 1)   (meta.ref.url)
  (1)Simbad (char) ask the Simbad data-base about this object
  (1)NED (char) ask the NED data-base about this object
  (2)nu GHz Observation frequency (em.freq;obs)
  (2)l_TSF (char) [≥] Limit flag on TSF (meta.code.error)
  (2)TSF yr (n) Structure function timescale (Note 1)   (time.scale)
  (2)TDCF yr (n) Discrete correlation function timescale (Note 1)   (time.scale)
  (2)TP yr (n) Lomb-Scargle periodogram timescale (Note 1)   (time.scale)
  (2)Note (char) Note(s) on timescales (Note 2)   (meta.note)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
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