Stripe 26 Footprint Anomaly

There is a defect in the footprint along stripe 26 from 254 > RA > 219 and 15 < DEC < 35 where Primary objects are missing in Camcols 2 and 3 of the Northern Strip of Stripe 26 in DR7.

These objects may be recovered from the RunsDB (select RunsDB as your context in the CasJobs query menu):

Here is a possible SQL for recovering these objects :

Select p.run,p.rerun,p.camcol,p.field,p.obj,p.ra,p.dec,g,mode,p.status,stripe,strip

From Photoobjall p,field f,segment s

Where Ra between 270 and 210 and

Dec between 5 and 35 and

G between 18 and 18.2 and

p.fieldid = f.fieldid and f.segmentid = s.segmentid

( and mode = 1 for dr7 )

With this, we can select the right data in Runsdb with :

$11 == 26 && ( $3 == 2 || $3 == 3) && $12 == 1

The North strip of Stripe 26 from the runsdb consists of objects from run 4002.