Black star?

• by ratprincess

  I saw the image of this "star" (SDSS Object Id: 123767464884810583) with a "spectrum" oscillating around 0 F lamda .

  What am I looking at?

  http://skyserver.sdss.org/dr12/en/tools/explore/Summary.aspx?id=1237674648848105833

  Posted July 1, 2016 4:22 PM

• by mlpeck

  You appear to be looking at nothing. For some reason SDSS targeted a patch of blank sky for spectroscopy.

  Actually every plate has some sky fibers but they shouldn't show up in Navigate as science targets.

  Posted July 2, 2016 7:32 PM

• by c_cld

  Notice that spectrum was taken on MJD 51908 = 30/12/2000 at least 6 months after the photometric pipeline target selection for the time of drilling a plate and plugging spectrograph fibers.

  Image has MJD 54210= 20/4/2007 and the transient event (asteroid or satellite trail which confused the spectrum target selection) had gone more than 7 years ago.

  We are left with sky noise! 😃

  Posted July 2, 2016 8:31 PM

• by ratprincess

  The past of the past ... 8-O

  Thanks!

  Posted July 3, 2016 6:10 PM