An Ugly Image

-Eli Rykoff.

When looking through regions of bad photometry in SVA1 I happened across exposure 180985, an i-band exposure of SPTE taken on 2013-02-23. This came to my attention because there is an almost vertical streak, which I assume is a satellite.

But what's troubling is that every single image has a bias jump in the middle.

Here is the full image:

And here is zoomed in:

You can also see that the background is clearly mis-subtracted and there's a bright spot in the corner of every ccd.