0 votes
Hi There,

I am doing a student research and I am querying the DES DR1 Galaxy table and don´t get galaxies with r greater than 17.7. Is this due to some saturation limit? Or is there something wrong in my query?
asked Nov 27, 2019 by anonymous | 71 views

1 Answer

0 votes

Hi Kat, thanks for reaching out.

What is your exact query? I just tried

select mag_auto_r from des_dr1.galaxies where mag_auto_r<99 and snr_r>10

and get 7890443 rows, whose histogram looks like this:


I've marked 17.7 with a vertical line. So, there are some galaxies brighter than that, but not many. See also Fig. 10 in the DES DR1 paper: https://ui.adsabs.harvard.edu/abs/2018ApJS..239...18A/abstract

Hope this helps. Let us know if we can help more.


answered Nov 27, 2019 by datalab (11,440 points)
edited Nov 28, 2019 by datalab

252 questions

254 answers


1,716 users

Welcome to Data Lab Help Desk, where you can ask questions and receive answers from other members of the community.