2005A&A...441..443N


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.04CEST21:53:17

2005A&A...441..443N - Astronomy and Astrophysics, volume 441, 443-450 (2005/10-2)

Photometric monitoring of the doubly imaged quasar UM 673: possible evidence for chromatic microlensing.

NAKOS T., COURBIN F., POELS J., LIBBRECHT C., MAGAIN P., SURDEJ J., MANFROID J., BURUD I., HJORTH J., GERMANY L., LIDMAN C., MEYLAN G., POMPEI E., PRITCHARD J. and SAVIANE I.

Abstract (from CDS):

We present the results of two-band CCD photometric monitoring of the gravitationally lensed quasar Q0142-100 (UM 673). The data, obtained at ESO-La Silla with the 1.54m Danish telescope in the Gunni-band (October 1998-September 1999) and in the Johnson V-band (October 1998 to December 2001), were analyzed using three different photometric methods. The light-curves obtained with all methods show variations, with a peak-to-peak amplitude of 0.14mag in V. Although it was not possible to measure the time delay between the two lensed QSO images, the brighter component displays possible evidence for microlensing: it becomes bluer as it gets brighter, as expected under the assumption of differential magnification of a quasar accretion disk.

Abstract Copyright:

Journal keyword(s): gravitational lensing - quasars: individual: Q0142-100 (UM 673)

Simbad objects: 8

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Number of rows : 8

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 [SMS87] 0142-100 G G 01 44 -09.7           ~ 23 1
2 [NOB2003] QSO 0142-100 4 * 01 45 03.62 -09 44 16.9     18.344     ~ 3 0
3 [NOB2003] QSO 0142-100 2 * 01 45 07.36 -09 49 00.5     17.700     ~ 3 0
4 [NOB2003] QSO 0142-100 3 * 01 45 08.91 -09 43 12.0     17.503     ~ 3 0
5 [NOB2003] QSO 0142-100 1 * 01 45 12.25 -09 47 48.9     16.543     ~ 3 0
6 QSO B0142-100 QSO 01 45 16.5955770048 -09 45 17.269954127   17.23 16.95     ~ 225 1
7 QSO B0142-100A LeQ 01 45 17.3 -09 45 12     16.9     ~ 37 1
8 QSO B0142-100B LeQ 01 45 17.3 -09 45 12     19.1     ~ 26 1

    Equat.    Gal    SGal    Ecl

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2020.07.04-21:53:17

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