Tales of Cataloguing IX -- VCV13 fixes for the record

I've done some more cleanups of the VCV13 (2010,A&A,518,10) quasar
catalog. These are different to those I published in 2013,PASA,30,4
as those were for objects unmatched to any optical signature, whereas
these are fully mapped to optical, but to the wrong ones. There
aren't many of these and I'm not going to write a paper for them, but
I think that these fixes should be placed into the public record.
Therefore I post them here, and full publication will be within my
half-million quasar catalog to come in 2015.

I herewith present 4 de-duplications and 8 moves (12 arcsec) of
quasars which VCV13 fixed onto the wrong optical object -- usually
because of errors or unclarity by the original authors (OA). I'll
explain each, all co-ordinates are J2000.

FOUR DE-DUPLICATIONS:

(1) Q 03020-0014, z=3.05, v=21.5 at 03 04 35.3 -00 02 25 is duplicate
to SDSS J03045-0002 (i.e. SDSS J030435.33-000251.0), z=3.061, r=20.3,
b=20.5 at a distance of 26 arcsec. The OA were Jakobsen P. et al,
2003-A&A-397-89 who included a finding chart not seen by VCV (early
editions sometimes omit plates), and so VCV positioned the object 26
due north of its actual location.

(2) RX J09278+3431, z=0.425, v=17.8 at 09 27 48.1 +34 31 02 is
duplicate to SDSS J09278+3431 (i.e. SDSS J092751.11+343103.6),
z=0.426, r=17.8, b=18.1 at a distance of 37 arcsec. The OA were Wei
J-Y. et al,1997-ChA&A-21-146 which isn't on ADS but NED confirms that
VCV13 faithfully reported this quasar as writ. The "RX" name shows
that this object was selected via X-ray association -- however, this
object is an obvious galaxy (or star-galaxy doublet) with no X-ray
detection nearby. The SDSS quasar, of the same redshift, has X-ray
association with 97% confidence (2RXP J092751.1+343102, 1RXS
J092750.7+343034). It is clearly the intended object.

(3) 1WGA J0958.0+4903, z=0.242, v=18.7 at 09 58 04.4 +49 03 08 is
duplicate to SDSS J09580+4903 (i.e. SDSS J095802.85+490311.0),
z=0.242, r=17.5, b=18.2 at a distance of 14 arcsec. From
Molthagen/Wendker/Briel 1997-A&AS-126-509 (not on ADS), the name shows
selection via X-ray, but, as with (2), this is not seen with today's
data. Instead, the SDSS quasar, of the same redshift, has X-ray
association (2RXP J095803.1+490317, 1WGA J0958.0+4902), and is clearly
the intended object.

(4) RXS J11479+2715, z=0.364, r=18.0, b=19.4 at 11 47 54.4 +27 15 00
is duplicate at an offset of 57 arcsec to US 2964, z=0.363, r=16.3,
b=16.4 at 11 47 58.5 +27 14 59. From Bade N. et al, 1995-A&AS-100,469
(their object 109), which presented this as the optical match to a
ROSAT source with an error radius of 49 arcsec, but they selected the
wrong object because today's data shows no nearby X-ray detection. US
2964, confirmed by SDSS-quasar-DR7 as a quasar of the same redshift,
is seen to match to X-ray 1RXS J114758.4+271507 with 87% confidence --
note this is the same RASS detection that RXS J11479+2715 was named
after.

EIGHT MOVES:

(1) IRAS 00029-1424, z=0.440, positioned onto blank sky, is moved 12
arcsec to 00 05 29.5 -14 07 48 which has radio NVSS J000529.0-140747.
The OA provided no finding chart.

(2) IXO 58, z=1.194, r=19.1, b=19.9 is moved 13 arcsec to SDSS
J122927.80+080630.5, r=18.9, b=19.7, identified by SDSS-DR10 as a
quasar with z=1.190, and has X-ray 3XMM J122927.7+080630. From
Gutierrez & Lopez-Corredoira 2005-ApJ-622-L89 which presented a
correct finding chart but VCV13 took an adjacent object on the slit.

(3) Q 1339.3+2716, z=1.754, vmag=20.5 (but positioned onto r=18.8,
b=20.8 -- clearly unsuitable photometry) is moved 20 arcsec to 13 41
37.8 +27 01 54, r=20.0, b=20.5 which is an SDSS photometric quasar
(NBCKDE J134137.77+270153.0) with radio FIRST J134137.7+270152. From
Crampton D. et al, 1988-AJ-96-816 which positioned this mid-way
between these two optical objects, and, uniquely for a quasar
discovery paper, provided a finding chart of stars but not of quasars.

(4) 2E 1416+2523, z=0.674, rmag=14.0, bmag=16.5 is moved 32 arcsec to
SDSS J141857.63+250948.6, rmag=17.9, bmag=18.6 which SDSS-DR10 found
to be a quasar of z=0.674 (i.e., the same), and has X-ray 3XMM
J141857.5+250948 & 1RXH J141857.5+250953. From Stocke, J. et al,
1983-ApJ-273-458 which set out to find optical sources for Einstein
X-ray detections. Stocke found a triplet of objects which he dubbed
A,B, and C, and pronounced B the source with z=0.674. You meant C,
John, argh! I am moving the name "2E 1416+2523" onto this object in
the Million Quasars catalog to reward the Einstein satellite's hard
working staff.

(5) PKS 1418-064, z=3.689, r=17.9, b=19.3 is moved 21 arcsec onto the
BZCAT blazar BZQ J1421-0643, same redshift, r=19.1, b=20.7 with radio
FIRST J142107.7-064355 and X-ray CXOX J142107.7-064356. From Savage &
Bolton, 1979-AuJPA-46-19, looking for optical objects for radio
sources, but is not on ADS. The object presented in VCV13 has no
radio, and the switch is obvious because the blazar has the same rare
redshift.

(6) Q 1532+01/2, z=0.31, r=16.1, b=17.4 is moved 92 arcsec to SDSS
J153456.20+013032.3, a SDSS-quasar-DR7 quasar of z=0.308, r=17.2,
b=18.4 with X-ray 3XMM J153456.2+013032. From Wilkes, B.,
1986-MNRAS-218-331 who gave no finding chart or astrometry whatsoever
and undoubtedly baffled the Verons who, if they ever threw a dart onto
a sky chart, would have done so here.

(7) CF 1549+48A, z=1.962, r=19.6, b=21.7 (patently unsuitable
photometry) is moved 23 arcsec to 15 51 06.6 +48 29 08, r=19.5, b=19.6
which is an SDSS photometric quasar (NBCKDE J155106.59+482908.2).
From Arp & Surdej, 1982-A&A-109-101 who presented a finding chart
which however had such low resolution and shallow photometry that
these objects could not be distinguished.

(8) Q 2112.8+0594, z=0.398, r=18.7, b=21.1 (patently unsuitable
photometry) is moved 21 arcsec to 21 15 16.6 +06 08 41, r=18.6,
b=18.6, X-ray 3XMM J211516.5+060840. The full sad story of this
object was given in the preceding post of this series, but in short
the OA Ellingson/Yee/Green 1991-ApJS-76-455 mangled both finding chart
and co-ordinates, now recovered.

I expect no more fixes of VCV13 remain, mindful that I've said this
before.

Eric Flesch
Wellington, New Zealand
9-Nov-2013