0048-097 No distinct features could be reliably tracked in this very compact jet.
0111+021 The second and third closest components to the core in this nearby BL Lac object (z=0.047) have significantly inward but slow (<40{mu}as/yr) motions over six VLBA epochs spanning 5yr.
0219+428 (3C 66A). No reliable spectroscopic redshift exists for this BL Lac object. Furniss et al. (2013ApJ...766...35F) have set limits of 0.3347{<=}z{<=}0.41 based on intergalactic absorption features.
0235+164 The jet structure was too compact at 15GHz to reliably measure any robust components.
0238-084 (NGC 1052). Multi-frequency VLBA observations of this two-sided jet by Vermeulen et al. (2003A&A...401..113V) and Kadler et al. (2004A&A...426..481K) indicate that the core feature is obscured at 15GHz by strong free-free absorption associated with a circumnuclear torus. In order to obtain the component positions at each epoch, the position of a virtual core was found using a least-squares minimization method, as described by Vermeulen et al. (2003A&A...401..113V). The core component entries in Table4 for this source are therefore left blank.
0300+470 No reliable redshift exists for this BL Lac object. Shaw et al. (2013ApJ...764..135S) derive a statistical upper limit of z<1.63 based on the absence of intergalactic absorption features. With the addition of a new epoch in 2008, a component (Comp=2) first identified in Paper VI (Lister et al., 2009, cat. J/AJ/138/1874) (Lister et al., 2009, cat. J/AJ/138/1874) in this BL Lac jet now has a statistically significant inward motion.
0430+289 No reliable redshift exists for this BL Lac object. Shaw et al. (2013ApJ...764..135S) derive a statistical upper limit of z<1.66 based on the absence of intergalactic absorption features, and Meisner & Romani (2010ApJ...712...14M) obtain z>0.48 based on optical non-detection of the host galaxy.
0506+056 This AGN is a Fermi LAT-detected, high-synchrotron peaked BL Lac object with unknown redshift. Meisner & Romani (2010ApJ...712...14M) obtain z>0.38 based on optical non-detection of the host galaxy, and Rau et al. (2012, cat. J/A+A/538/A26) set an upper limit z<1.24 based on the photometric redshift technique. A weak component on the western edge of this jet (Comp=3) shows a statistically significant inward motion of 100{+/-}14{mu}as/yr. This corresponds to an apparent speed between 2.3c and 6.1c, given the redshift limits.
0716+332 There were no components strong enough or sufficiently isolated to be considered robust in this jet.
0716+714 A spectroscopic redshift has yet to be obtained for this BL Lac object. Nilsson et al. (2008A&A...487L..29N) published a value of 0.31{+/-}0.08 based on a host galaxy magnitude estimate, while Danforth et al. (2013ApJ...764...57D) have constrained the redshift to the range 0.2315<z<0.322 using intervening absorption systems. We note that if the redshift is at the upper limit of this range, 0716+714 becomes one of the fastest jets in our sample (43.6c{+/-}1.3c). For all redshift values in the possible range, the jet is a distinct outlier in the {beta}app versus luminosity plot (Figure 13).
0727-115 We did not identify any components in this jet as sufficiently robust to track over time.
0814+425 No reliable spectroscopic redshift exists for this BL Lac object. Sbarufatti et al. (2005ApJ...635..173S) found z>0.75 based on a lower limit to the host galaxy magnitude, and Shaw et al. (2013ApJ...764..135S) derive a statistical upper limit of z < 2.47 based on the absence of intergalactic absorption features. The innermost component of this jet showed significant inward motion between 1995 and 2006. We did not previously consider this component to be robust in Paper VI (Lister et al., 2009, cat. J/AJ/138/1874) due to confusion arising from an emerging new component in 2007 (now identified as Comp=6).
0946+006 There was too much positional scatter in the brightest downstream jet component (Comp=2) to consider it as robust over the short 2yr long VLBA coverage of this AGN.
0954+556 (4C +55.17). This unusual quasar is largely resolved by the VLBA at 15GHz, yet has strong and variable {gamma}-ray emission. McConville et al. (2011ApJ...738..148M) have suggested that it may be a young radio source. We were not able to identify any robust components in this jet.
1011+496 This TeV-detected BL Lac object (1ES 1011+496; Albert et al., 2007ApJ...667L..21A) has a jet component moving at 1.8c{+/-}0.4c, making it a rare example of a superluminal high-synchrotron peaked blazar.
1124-186 The jet structure was too compact at 15GHz to reliably measure any robust components.
1228+126 (M87) We confirm the slow speeds we measured in Paper VI (Lister et al., 2009, cat. J/AJ/138/1874) for this nearby radio galaxy. The closest component to the core in the main jet (Comp=6) has a very slow pattern speed (3.5{+/-}4{mu}as/yr), and the fastest component (Comp=4) has significant non-radial motion at 0.026c{+/-}0.003c. These speeds are significantly slower than those measured in the HST-1 feature (0.6c{+/-}0.3c; Chang et al., 2010A&A...515A..38C), located more than 80pc farther down the jet. Ly et al. (2007ApJ...660..200L) found speeds of 0.25c-0.4c in the region 2-4mas downstream from the core, based on five VLBI epochs at 22 and 43GHz obtained between 1999 and 2004.
1324+224 The jet structure was too compact at 15GHz to reliably measure any robust components.
1424+240 No reliable spectroscopic redshift exists for this BL Lac object. Although Meisner & Romani (2010ApJ...712...14M) obtained z=0.23 based on its host galaxy magnitude, Shaw et al. (2013ApJ...764..135S) subsequently set a firm lower limit of z>0.6035 based on intergalactic absorption features.
1458+718 We confirm the apparent inward motion reported in Paper VI (Lister et al., 2009, cat. J/AJ/138/1874) of two components in a complex emission region located ~25 mas south of the core in this compact steep-spectrum quasar. With our new data we have found one additional component in this complex (Comp=2) that is also moving inward, in a non-radial direction. The inward speeds of the three components range from ~1.4c to 4.6c.
1509+054 The radio structure of this AGN consists of three bright components. We identify the radio core as the middle component, based on the spectral index map of T. Hovatta et al. (in preparation).
1637+826 This nearby Seyfert 2 radio galaxy (also known as NGC 6251, at z=0.024) contains five outward-moving components with {>=}3{sigma} speeds, all of which are below 0.15c. The innermost component (Comp=8), however, has a small but significant inward motion of 50{+/-}10{mu}as/yr (0.08c{+/-}0.015c).
1739+522 The jet structure was too compact at 15GHz to reliably measure any robust components.
1741-038 The jet structure was too compact at 15GHz to reliably measure any robust components.
1823+568 This BL Lac jet at z=0.664 has a very fast component speed: 26.2c{+/-}2.6c, as compared with the next fastest BL Lac component (15.1c{+/-}0.4c for 0851+202). It has been classified as a quasar by Veron-Cetty & Veron (2006, cat. VII/248, obsoleted by cat. VII/258) and as a powerful FR II jet by Murphy et al. (1993MNRAS.264..298M) based on its extended radio emission. It therefore may be an intermediate BL Lac/quasar type object.
1921-293 The low declination and north-south orientation of this jet made it impossible to robustly track any of its bright features over time.
1958-179 The jet structure was too compact at 15GHz to reliably measure any robust components.
1959+650 The jet structure was too weak and compact at 15GHz to reliably measure any robust components.
2005+403 In Paper VI (Lister et al., 2009, cat. J/AJ/138/1874) we reported a possible inward motion of a component very close to the core (Comp=6); however, our new data indicate that there is too much complex sub-structure in this region to reliably determine robust component positions.
2021+614 We find the two outermost components (Comp=1 and 2) to have inward motions, albeit with very slow speeds (7.2 and 15.2{mu}as/yr, respectively). The fitted motion vector for component 1 is non-radial. The core component location in this jet remains uncertain (see Paper VI, Lister et al., 2009, cat. J/AJ/138/1874).
2023+335 The radio structure in this low galactic latitude quasar (-2.4{deg}) is too strongly affected by interstellar scattering to permit the tracking of robust jet features (Pushkarev et al., 2013A&A...555A..80P).
2200+420 (BL Lacertae). The innermost component (Comp=7) of this jet showed very little motion and an uncertain vector motion direction in our Paper VI (Lister et al., 2009, cat. J/AJ/138/1874) analysis. With the addition of many new epochs since 2007, we now find the component to have a very slow but significant motion of 3.8{+/-}0.6{mu}as/yr (0.017c{+/-}0.003c).
2201+171 Our previous analysis in Paper VI (Lister et al., 2009, cat. J/AJ/138/1874) suggested inward motion for component 3, but subsequent data revealed that its fitted position after 2007 was likely affected by a new rapidly outward-moving component (Comp=6). As a result, we have categorized component 3 as non-robust.
2230+114 (CTA 102). In Paper VI (Lister et al., 2009, cat. J/AJ/138/1874) we reported a single jet component at ~6mas (Comp=4) as having significant inward motion, which is re-affirmed with the most recent data.
2247-283 All of the fitted jet features in this source were weaker than 100mJy, and none could be reliably tracked over the five available epochs.
2351+456 After reporting an inward-moving component (Comp=2) in Paper VI (Lister et al., 2009, cat. J/AJ/138/1874), we subsequently re-performed the model fits to all epochs, including the new data, and now find no statistically significant motion for this component ({mu}=40{+/-}14{mu}as/yr).