2021MNRAS.504..621F

Query : 2021MNRAS.504..621F

2021MNRAS.504..621F - Mon. Not. R. Astron. Soc., 504, 621-635 (2021/June-2)

Identification confusion and blending concealment in the SDSS-DR16 Quasar catalogues - 40 new quasars and 82 false quasars identified.

FLESCH E.W.

Abstract (from CDS):

The SDSS-DR16 Quasar Superset and pipeline catalogues are searched for undeclared quasars that were concealed by or confused with other objects, usually due to incomplete deblending. 40 such quasars with redshifts are found and herewith presented. Also, 82 entries in the SDSS-DR16Q main quasar catalogue are shown to be non-quasars, some also due to incomplete deblending, especially 'line poachers'. Other non-quasars are shown to be star spikes or moving stars or other types, and seven new quasars are identified from analysis of 'unplugged' spectra. These numbers are tiny compared with the millions of DR16 spectra, but highlight some heretofore overlooked systematics. The deblending issue is discussed throughout.

Abstract Copyright: © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): quasars: general

Simbad objects: 89

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Number of rows : 89
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 GALEX J000300.2+015230 WD* 00 03 00.2358114120 +01 52 30.639594972           DAH 5 0
2 SDSS J000628.22+293205.1 QSO 00 06 28.222 +29 32 05.17           ~ 2 0
3 SDSS J002724.36-023014.8 QSO 00 27 24.36792 -02 30 14.7996           ~ 1 0
4 GALEX J002958.7+283525 WD* 00 29 58.6728333644 +28 35 25.895100275           DC 4 1
5 SDSS J003014.24+145715.0 QSO 00 30 14.24592 +14 57 15.0552           ~ 1 0
6 SDSS J005202.92-003511.7 QSO 00 52 02.92536 -00 35 11.7348           ~ 1 0
7 SDSS J010800.09+210417.0 QSO 01 08 00.094 +21 04 17.04           ~ 6 0
8 SDSS J010858.45+053402.7 QSO 01 08 58.454 +05 34 02.78           ~ 2 0
9 SDSS J011700.13+281050.9 QSO 01 17 00.139 +28 10 50.94           ~ 3 0
10 SDSS J011744.84+033630.9 QSO 01 17 44.84136 +03 36 30.9420           ~ 1 0
11 * f Psc PM* 01 17 47.9564553482 +03 36 52.088733702   5.210 5.137     A1V 109 0
12 SDSS J012808.64+005247.1 LM* 01 28 08.6322177552 +00 52 47.241597072           M1 9 1
13 SDSS J013152.41+014211.7 QSO 01 31 52.41864 +01 42 11.7576           ~ 1 0
14 SDSS J013218.98+221017.5 QSO 01 32 18.985 +22 10 17.57           ~ 2 0
15 SDSS J013502.08+141110.2 QSO 01 35 02.08968 +14 11 10.2012           ~ 1 0
16 SDSS J013738.20+223301.2 QSO 01 37 38.202 +22 33 01.29           ~ 2 0
17 GALEX J014029.4+024005 WD* 01 40 29.4943479268 +02 40 04.451333505           DA 2 1
18 SDSS J015853.65+182048.4 QSO 01 58 53.657 +18 20 48.48           ~ 2 0
19 SDSS J020601.81+265512.2 CV? 02 06 01.8160950384 +26 55 12.241954884           M5III 2 1
20 SDSS J022613.77+035835.8 QSO 02 26 13.7832457632 +03 58 36.655525704           ~ 9 0
21 [VV2006] J025051.3-072450 QSO 02 50 51.3211563120 -07 24 50.236312032   19.58 19.39     ~ 22 0
22 SDSS J025640.76+015329.3 QSO 02 56 40.740 +01 53 29.12     20.50   19.89 ~ 3 0
23 SDSS J044911.74-063619.6 WD* 04 49 11.7304787208 -06 36 20.129927832           DA 14 1
24 SDSS J070731.45+382531.0 WD* 07 07 31.4421859560 +38 25 31.207180440           DQ 13 1
25 SDSS J073526.83+201230.6 QSO 07 35 26.83848 +20 12 30.6504           ~ 1 0
26 SDSS J074259.24+353255.7 QSO 07 42 59.24688 +35 32 55.7196           ~ 1 0
27 SDSS J074745.04+291706.7 QSO 07 47 45.048 +29 17 06.71           ~ 2 0
28 SDSS J080821.55+055834.9 QSO 08 08 21.559 +05 58 34.90           ~ 5 0
29 SDSS J083503.83+090346.7 QSO 08 35 03.83016 +09 03 46.7928           ~ 1 0
30 SDSS J084600.52+070428.8 QSO 08 46 00.528 +07 04 28.82           ~ 9 0
31 SDSS J084736.12+445044.8 QSO 08 47 36.120 +44 50 44.88           ~ 2 0
32 SDSS J084852.79+190329.4 QSO 08 48 52.790 +19 03 29.41           ~ 2 0
33 SDSS J084901.54+381958.7 QSO 08 49 01.54416 +38 19 58.7856           ~ 1 0
34 SDSS J090310.72+414202.4 QSO 09 03 10.72488 +41 42 02.4768           ~ 1 0
35 SDSS J091106.97+541547.8 WD* 09 11 06.9854222760 +54 15 47.892462084           DC 10 1
36 SDSS J091552.43+275804.5 QSO 09 15 52.43736 +27 58 04.5840           ~ 1 0
37 GALEX J092241.9+462638 WD* 09 22 41.9618871408 +46 26 38.873503788           DC 9 0
38 SDSS J093024.29+525256.2 QSO 09 30 24.3000376680 +52 52 56.324139600           ~ 13 0
39 SDSS J093403.77+263711.0 QSO 09 34 03.779 +26 37 11.09           ~ 2 0
40 SDSS J093859.23+020925.8 * 09 38 59.2236566785 +02 09 25.939418918           M1 15 0
41 SDSS J093859.26+020924.3 QSO 09 38 59.2697808781 +02 09 24.323116292           ~ 14 0
42 SDSS J100531.94+424930.7 QSO 10 05 31.94784 +42 49 30.7452           ~ 1 0
43 SDSS J100617.29-000133.3 QSO 10 06 17.29728 -00 01 33.3840           ~ 1 0
44 SDSS J100932.98+271436.5 QSO 10 09 32.98704 +27 14 36.5496           ~ 1 0
45 SDSS J101012.66+560520.5 QSO 10 10 12.6416345318 +56 05 20.591751803           ~ 3 0
46 [VV2006] J101012.7+560520 QSO 10 10 12.77112 +56 05 20.0940           ~ 18 1
47 SDSS J101243.07+340053.5 QSO 10 12 43.071 +34 00 53.51           ~ 3 0
48 SDSS J101747.63+373053.3 QSO 10 17 47.63232 +37 30 53.3952           ~ 1 0
49 SDSS J102039.30+284039.7 QSO 10 20 39.309 +28 40 39.70           ~ 2 0
50 SDSS J102622.80+042254.3 QSO 10 26 22.80144 +04 22 54.3108           ~ 1 0
51 SDSS J102928.95+400121.0 QSO 10 29 28.95552 +40 01 21.0108           ~ 1 0
52 SDSS J103724.07+481955.5 QSO 10 37 24.074 +48 19 55.59           ~ 6 0
53 SDSS J103745.92+061302.3 LM* 10 37 45.9220915370 +06 13 02.411675913           M2 11 0
54 SDSS J105525.24+620108.5 WD* 10 55 25.2466656624 +62 01 08.198055408           DC 6 0
55 SDSS J105953.56+333648.9 QSO 10 59 53.569 +33 36 48.93           ~ 2 0
56 GALEX J110406.6+203529 WD* 11 04 06.69678 +20 35 28.7236   16.9   17.7   DQ 17 0
57 SDSS J110918.07+362737.0 QSO 11 09 18.078 +36 27 37.07           ~ 3 0
58 SDSS J111352.00+281654.1 QSO 11 13 52.003 +28 16 54.15           ~ 2 0
59 SDSS J123401.24+063212.1 QSO 12 34 01.2509051712 +06 32 12.099118344           ~ 9 0
60 SDSS J123424.00+355616.6 QSO 12 34 24.00528 +35 56 16.6704           ~ 1 0
61 SDSS J123832.53+584022.3 WD* 12 38 32.5518890664 +58 40 22.112656284           DC 11 0
62 SDSS J124412.70+503307.5 QSO 12 44 12.70248 +50 33 07.5888           ~ 1 0
63 SDSS J133321.77+393626.0 QSO 13 33 21.776 +39 36 26.01           ~ 5 0
64 SDSS J134554.61+554435.8 QSO 13 45 54.499 +55 44 35.27           ~ 6 0
65 SDSS J135307.59+450854.1 QSO 13 53 07.598 +45 08 54.18           ~ 8 0
66 SDSS J142232.77+523940.1 QSO 14 22 32.779 +52 39 40.20           ~ 4 0
67 SDSS J143001.46+345933.6 QSO 14 30 01.46328 +34 59 33.5616           ~ 1 0
68 SDSS J143935.51+015434.9 QSO 14 39 35.51712 +01 54 34.9668           ~ 1 0
69 SDSS J151146.98+465849.6 QSO 15 11 46.98744 +46 58 49.6560           ~ 1 0
70 SDSS J154316.72+402636.3 Sy1 15 43 16.72872 +40 26 36.3372           ~ 10 1
71 SDSS J154316.78+402634.9 * 15 43 16.7878798282 +40 26 34.886427135           M1 3 0
72 SDSS J154514.78+480840.7 QSO 15 45 14.78376 +48 08 40.7148           ~ 1 0
73 SDSS J154516.12+444116.8 QSO 15 45 16.12368 +44 41 16.8540           ~ 1 0
74 WISE J154815.37+284452.2 QSO 15 48 15.4180726946 +28 44 52.644864979   20.58 20.22     ~ 26 1
75 SDSS J155100.97+482938.7 QSO 15 51 00.97152 +48 29 38.7096           ~ 1 0
76 SDSS J211243.73+000121.6 QSO 21 12 43.73712 +00 01 21.6444           ~ 1 0
77 SDSS J212112.13-003300.2 QSO 21 21 12.1365500472 -00 33 00.261464940           ~ 9 0
78 SDSS J213615.41+000250.6 QSO 21 36 15.4195481736 +00 02 50.595461052           ~ 7 0
79 SDSS J214325.74+244941.1 QSO 21 43 25.74744 +24 49 41.1564           ~ 1 0
80 SDSS J214653.82+025248.4 QSO 21 46 53.82456 +02 52 48.4860           ~ 1 0
81 SDSS J220631.37+241125.0 QSO 22 06 31.37976 +24 11 25.0584           ~ 1 0
82 SDSS J222226.93+312244.6 QSO 22 22 26.93544 +31 22 44.6988           ~ 1 0
83 SDSS J222550.94+044202.4 QSO 22 25 50.94456 +04 42 02.4912           ~ 1 0
84 SDSS J223132.62-010928.3 QSO 22 31 32.62152 -01 09 28.3860           ~ 1 0
85 SDSS J224430.44+233932.5 QSO 22 44 30.4502070913 +23 39 32.474095522           ~ 7 0
86 SDSS J225242.55+285923.3 QSO 22 52 42.55320 +28 59 23.3268           ~ 1 0
87 SDSS J225843.37+222053.4 QSO 22 58 43.37280 +22 20 53.4552           ~ 1 0
88 SDSS J230251.92+024915.0 QSO 23 02 51.928 +02 49 15.07           ~ 5 0
89 SDSS J233056.81+295652.6 WD* 23 30 56.8066370040 +29 56 52.803043944           DZH 14 1

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