1998A&AS..129..445R


Query : 1998A&AS..129..445R

1998A&AS..129..445R - Astron. Astrophys., Suppl. Ser., 129, 445-454 (1998/May-1)

A search for rapid optical variability in radio-quiet quasars.

RABBETTE M., McBREEN B., SMITH N. and STEEL S.

Abstract (from CDS):

The detection of rapid variability on a timescale of hours in radio-quiet quasars (RQQSOs) could be a powerful discriminator between starburst, accretion disc and relativistic jet models of these sources. This paper contains an account of a dedicated search for rapid optical variability in RQQSOs. The technique used differential photometry between the RQQSO and stars in the same field of view of the CCD. The 23 RQQSOs that were observed all have high luminosities (-27<MV←30), and 22 of these sources are at redshifts z>1. The total amount of observation time was about 60 hours and these observations are part of an ongoing programme, started in September 1990, to search for rapid variability in RQQSOs. No evidence for short-term variability greater than about 0.1 magnitudes was detected in any of the 23 sources, however long-term variability was recorded for the radio-quiet quasar PG 2112+059. The finding charts are included here because they identify the RQQSO and the reference stars used in the photometry, and hence are available for use by other observers. The unusual properties of two RQQSOs that were not included in our source list are noted. X-ray results reveal that PG 1416-129 is variable on a timescale of days and that the remarkable source IRAS 13349+2438 varied by a factor of two on a timescale of a few hours. The latter source displayed blazar type behaviour in X-rays and implies that relativistic beaming may occur in at least some RQQSOs. Radio results also indicate the presence of jets in at least some RQQSOs.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: photometry - quasars: general

Simbad objects: 25

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Number of rows : 25
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 QSO B0117+2118 QSO 01 20 17.2642359528 +21 33 46.197696168     16.1     ~ 126 0
2 QSO B0235+1624 BLL 02 38 38.93010450 +16 36 59.2745528   16.46 15.50 15.92   ~ 1468 2
3 QSO B0537-441 BLL 05 38 50.36155950 -44 05 08.9390233   15.77 16.48 16   ~ 847 2
4 QSO B0836+443 QSO 08 39 35.1895611072 +44 08 10.644605160   17.75 17.49     ~ 32 0
5 QSO B0837+470 QSO 08 40 29.9710190952 +46 51 13.731882156   17.40 17.20     ~ 41 0
6 7C 083849.60+453626.00 Bla 08 42 15.3516545208 +45 25 44.182186752   18.16 17.70 16.5   ~ 58 1
7 QSO J0947-0425 QSO 09 47 49.5681568632 -04 25 14.947045716     18.80     ~ 9 0
8 QSO B1011+0906 QSO 10 13 41.8614876864 +08 51 26.158228128   17.8 17.7     ~ 48 0
9 QSO B1013+0035 QSO 10 15 49.0046761680 +00 20 20.010036984   22.25 20.79     ~ 66 0
10 QSO B1033-033 QSO 10 36 23.7457432848 -03 43 18.929156772     18.5     ~ 66 0
11 QSO B1050-0000 QSO 10 53 20.4267162840 -00 16 49.652922360   22.49 20.77     ~ 63 0
12 QSO B1108-07 QSO 11 11 13.600 -08 04 02.00     18.10     ~ 70 0
13 QSO B1110+011 QSO 11 12 46.3004391096 +00 49 57.499789872   20.33 19.42     ~ 44 0
14 QSO B1144-0723 QSO 11 46 35.6192462328 -07 40 04.821925728     18.60     ~ 24 0
15 QSO B1146+110D BLL 11 48 51.3104360808 +10 48 24.461367912   18.02 17.76     ~ 41 0
16 QSO B1159+123 QSO 12 01 47.9118521640 +12 06 30.253926276   18.85 18.16     ~ 98 0
17 QSO B1201-015 QSO 12 04 19.8287586024 -01 47 50.310058920   18.16 17.99     ~ 24 0
18 QSO B1202-074 QSO 12 05 23.1360370080 -07 42 32.759842896     17.5     ~ 367 5
19 QSO B1222+023 QSO 12 25 18.4115713200 +02 06 56.637312912   17.88 17.66     ~ 34 0
20 LB 19 QSO 12 50 05.7146863848 +26 31 07.598352000   16.12 15.92     ~ 199 0
21 QSO B1258+2839 QSO 13 00 48.1088801448 +28 23 20.737051008   17.82       ~ 74 1
22 QSO J1331+4101 QSO 13 31 41.1396131064 +41 01 58.778510304   17.52 17.41     ~ 108 0
23 QSO B1500+0824 QSO 15 02 45.3659459880 +08 13 05.191513248   20.77 19.43     ~ 24 0
24 2MASS J21145258+0607423 Sy1 21 14 52.5774985320 +06 07 42.433198104   16.06 15.77     ~ 206 0
25 PB 5235 QSO 23 04 44.9534365920 +03 11 45.917366280   15.44 15.8     ~ 103 0

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2022.12.07-01:08:24

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