Picking Quasars from qso_mock.fits file

[jennykim1016]

Good Evening @drphilmarshall!

I remember that there are mixtures of lenses and quasars in the qso_mock.fits file. I am not totally sure whether we talked about this in the meeting, but are there any recommended methods that I could use to just pull out only the quasars?
All the rows have ZSCR and MAGI_IN greater than zero( i.e. db.sample[db.sample['ZSRC']<0] and db.sample[db.sample['MAGI_IN']<0] both return zero). I thus thought of choosing quasars from lenses based on the i band magnitude distributions, but I was wondering whether there would be a better way to choose quasars.

Thank you so much!

[drphilmarshall]

Hi Jenny - each row in the table specifies a _lens system_. A lens system has both lens (galaxy) and source (quasar) properties. The term "lenses" in the OM10 code typically refers to a _lens system_. The `sample` that you select is a subset of the main table: each item in the sample is a lens system. To pull out the quasar source information only, just ask for the quasar properties!

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On Sun, Feb 5, 2017 at 8:17 PM, Jenny Kim ***@***.***> wrote: Good Evening @drphilmarshall <https://github.com/drphilmarshall>! I remember that there are mixtures of lenses and quasars in the qso_mock.fits file. I am not totally sure whether we talked about this in the meeting, but are there any recommended methods that I could use to just pull out only the quasars? All the rows have ZSCR and MAGI_IN greater than zero( i.e. db.sample[db.sample['ZSRC']<0] and db.sample[db.sample['MAGI_IN']<0] both return zero). I thus thought of choosing quasars from lenses based on the i band magnitude distributions, but I was wondering whether there would be a better way to choose quasars. Thank you so much! — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#10>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AArY98BSrns4gZVnwFdk7P0lWg1KnLSdks5rZp7QgaJpZM4L3wyq> .