Old Q0957+561 data & software:
► Simple FORTRAN programs to apply the d2 test (accurate and robust time delay measurements)
► Photos
Advertising:
The third phase of the monitoring programme with the 2 m Liverpool Robotic Telescope (LRT) began in 2010 October. This LQLM III project is being carried out with most of the available optical instruments: the RATCam and IO:O cameras, the FRODOspec spectrometer and the RINGO polarimeter, so it represents a final qualitative leap in our observational programme with the LRT. In addition, new observations with the world's largest ground-based telescopes and space-based facilities are used to complement the LQLM database. Here below we include a "News section" on some double quasars that are key monitoring targets. The figures show data for the two quasar images, A (red) and B (blue), and reference stars (black/green)
LRT (RATCam) - USNO catched a long-timescale
extrinsic fluctuation in
Spectra
of
Q0957+561 are taken
weekly with
FRODOspec: the emission line close to 4500 Å in the
observer's frame corresponds to CIII,
while the other prominent line in the 6500-7000 Å interval represents the
MgII
emission
RATCam & IO:O follow-up the puzzling variability of SDSS J1339+1310.
This monitoring campaign will be finished in July 2013
RINGO2 polarisation measurements of
Q0957+561 showing that p(A) ~
1% on March 26, 2012 (the instrumental polarisation is traced by the square
and the four stars)
