2018MNRAS.480.3889R

Query : 2018MNRAS.480.3889R

2018MNRAS.480.3889R - Mon. Not. R. Astron. Soc., 480, 3889-3897 (2018/November-1)

Redshifted broad absorption line quasars found via machine-learned spectral similarity.

REIS I., POZNANSKI D. and HALL P.B.

Abstract (from CDS):

We report the discovery of 31 new redshifted broad absorption line quasars (RSBALs) from the Sloan Digital Sky Survey (SDSS). The number of previously known such objects is 19. The identification of the new objects was enabled by calculating similarities between quasar spectra in the SDSS. Using these similarities we look for the objects that are similar to the ones in the original sample, visually inspecting only hundreds, out of over 160 000 spectra considered. We compare the performance of several similarity measures, as well as different methods of employing them, in finding the RSBALs. We find that decision tree based similarities recover the most objects, and that an ensemble of methods performs better than any single one. As the similarities are not tailored for the specific problem of finding RSBALs, they could be used for searching for other types of quasars. The similarities and the code for their calculation are available online.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): methods: data analysis - techniques: spectroscopic - quasars: absorption lines - quasars: general

Simbad objects: 51

goto Full paper

goto View the references in ADS

Number of rows : 51
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 SDSS J003043.37+300549.8 QSO 00 30 43.3782473976 +30 05 49.817704560           ~ 8 0
2 SDSS J004232.28+302546.5 QSO 00 42 32.2799757504 +30 25 46.604467452           ~ 6 0
3 SDSS J005646.51+282913.5 QSO 00 56 46.5191676384 +28 29 13.588817064           ~ 5 0
4 SDSS J005942.19+105336.0 QSO 00 59 42.1918767984 +10 53 36.029748984           ~ 5 0
5 SDSS J014829.81+013015.0 QSO 01 48 29.8107016032 +01 30 15.111837612           ~ 7 0
6 SDSS J023653.57-062650.1 QSO 02 36 53.5808268600 -06 26 50.108555976           ~ 7 0
7 SDSS J023959.74+000231.6 QSO 02 39 59.748 +00 02 31.65           ~ 5 0
8 SDSS J075117.58+513739.1 QSO 07 51 17.5975816632 +51 37 39.180567792   20.20 19.85     ~ 20 0
9 [VV2006] J075728.9+252440 QSO 07 57 28.8737104680 +25 24 41.188026888   20.17 19.91     ~ 25 0
10 SDSS J080544.99+264102.9 QSO 08 05 44.993 +26 41 02.93           ~ 7 0
11 SDSS J082818.81+362758.6 QSO 08 28 18.8134328184 +36 27 58.697793288           ~ 10 0
12 SDSS J083030.26+165444.7 QSO 08 30 30.2681015184 +16 54 44.823394944           ~ 11 0
13 [VV2006] J084700.7+063556 QSO 08 47 00.7559315328 +06 35 56.588951832   21.45 20.99     ~ 25 0
14 [VV2006] J085603.7+292427 QSO 08 56 03.6882317784 +29 24 26.618374368   23.73 21.91     ~ 21 0
15 SDSS J091513.00+071237.5 QSO 09 15 13.0020093696 +07 12 37.622118168           ~ 6 0
16 SDSS J094108.92-022944.7 QSO 09 41 08.920 -02 29 44.79           ~ 5 0
17 SDSS J094922.86+065628.7 QSO 09 49 22.8690509256 +06 56 28.808591568           ~ 6 0
18 SDSS J100430.91+152100.3 QSO 10 04 30.919 +15 21 00.32           ~ 6 0
19 SDSS J101809.26+282130.0 QSO 10 18 09.2654853240 +28 21 30.091203612           ~ 5 0
20 SDSS J101922.81+125922.2 QSO 10 19 22.816 +12 59 22.29           ~ 6 0
21 SDSS J101946.08+051523.7 QSO 10 19 46.0612112592 +05 15 23.662231128           ~ 8 0
22 SDSS J104045.96+221802.6 QSO 10 40 45.961 +22 18 02.68           ~ 6 0
23 SDSS J110003.27+080455.1 QSO 11 00 03.2706869136 +08 04 55.140919716           ~ 6 0
24 SDSS J110214.28+110243.1 QSO 11 02 14.2804391784 +11 02 43.151985888           ~ 7 0
25 SDSS J114655.05+330750.1 QSO 11 46 55.0534010520 +33 07 50.073595356           ~ 9 0
26 [VV2006] J114756.0-025023 QSO 11 47 56.0013503352 -02 50 23.398559520   21.43 20.55     ~ 29 0
27 [VV2006] J115652.7+132622 QSO 11 56 52.7101187928 +13 26 22.455807000   22.92 21.34     ~ 23 0
28 SDSS J115858.17+541920.9 QSO 11 58 58.1810883144 +54 19 20.946406512           ~ 8 0
29 [VV2006] J122909.7+093809 QSO 12 29 09.6408900678 +09 38 10.131495569   20.41 20.08     ~ 30 1
30 SDSS J122920.66-012710.0 QSO 12 29 20.6634883440 -01 27 10.012391748           ~ 8 0
31 SDSS J131410.90+655100.5 QSO 13 14 10.9009592304 +65 51 00.683580744           ~ 8 0
32 SDSS J131852.14+282357.2 QSO 13 18 52.1465447520 +28 23 57.273453564           ~ 6 0
33 SDSS J132333.01+004633.8 QSO 13 23 33.0207757944 +00 46 33.841090560           ~ 10 0
34 SDSS J142319.81+223601.2 QSO 14 23 19.811 +22 36 01.21           ~ 7 0
35 SDSS J143829.67+095555.0 QSO 14 38 29.6773362792 +09 55 55.113997908           ~ 7 0
36 SDSS J143945.28+044409.2 QSO 14 39 45.281 +04 44 09.24           ~ 7 0
37 SDSS J144055.59+315051.7 QSO 14 40 55.5856301232 +31 50 51.745345620           ~ 8 0
38 [VV2006] J144424.6+013456 QSO 14 44 24.5493600432 +01 34 57.018742752   21.56 20.98     ~ 25 0
39 SDSS J152004.60+105634.3 QSO 15 20 04.5999234024 +10 56 34.292201460           ~ 2 0
40 SDSS J152851.06+344400.7 QSO 15 28 51.0615484032 +34 44 00.774910284           ~ 6 0
41 SDSS J162853.69+475058.7 QSO 16 28 53.693 +47 50 58.79           ~ 6 0
42 SDSS J170641.79+345019.7 QSO 17 06 41.7944411496 +34 50 19.717986912           ~ 6 0
43 SDSS J170953.28+270516.6 QSO 17 09 53.2887639672 +27 05 16.696901040           ~ 9 0
44 SDSS J172404.44+313539.6 QSO 17 24 04.4307385992 +31 35 39.652036080           ~ 12 0
45 SDSS J215704.26-002217.7 QSO 21 57 04.2721068168 -00 22 17.802755760           ~ 10 0
46 SDSS J221228.68+214021.9 QSO 22 12 28.683 +21 40 21.96           ~ 7 0
47 SDSS J222447.34+102109.8 QSO 22 24 47.3402200632 +10 21 09.888369624           ~ 6 0
48 SDSS J231610.33+184337.3 QSO 23 16 10.336 +18 43 37.30           ~ 6 0
49 SDSS J232044.09+323053.0 QSO 23 20 44.0990097864 +32 30 53.011349856           ~ 7 0
50 SDSS J232222.06+232037.2 QSO 23 22 22.0641225240 +23 20 37.217773644           ~ 6 0
51 SDSS J235159.88+094434.2 QSO 23 51 59.8814010144 +09 44 34.327542408           ~ 6 0

To bookmark this query, right click on this link: simbad:objects in 2018MNRAS.480.3889R and select 'bookmark this link' or equivalent in the popup menu