Dear Sam,
we are using Marz to redshift quasars and other objects in AAOmega data form the AAT for an eROSITA project. We are finding that the cross-correlation function for quasars often appears to be inverted, so that the peaks corresponding to good redshift matches are actually negative dips. This means that they are not found as the best match. A screen shot of an example is shown below.
The data used to make this can be found here: http://www.physics.usyd.edu.au/~scroom/outgoing/SEP4_erosita_run009_v19_20.fits
It has been reduced using the ozDES pipeline.
If you have any ideas why the cross-correlation should look like this, and how to fix it, that would be very helpful.
Thanks,
Scott
Dear Sam,
we are using Marz to redshift quasars and other objects in AAOmega data form the AAT for an eROSITA project. We are finding that the cross-correlation function for quasars often appears to be inverted, so that the peaks corresponding to good redshift matches are actually negative dips. This means that they are not found as the best match. A screen shot of an example is shown below.
The data used to make this can be found here: http://www.physics.usyd.edu.au/~scroom/outgoing/SEP4_erosita_run009_v19_20.fits
It has been reduced using the ozDES pipeline.
If you have any ideas why the cross-correlation should look like this, and how to fix it, that would be very helpful.
Thanks,
Scott