Line through top

Any one have any ideas why there is a straight line through the spiral arm?

Posted June 2, 2015 10:20 PM

by Budgieye moderator

Straight black line is an artifact,, maybe a row of bad pixels where data didn't get collected in the i filter. Maybe a satellite went through, and the trail was erased by software. It left a vague blue-green area in the final image

enter image description here

http://skyserver.sdss.org/dr8/en/tools/explore/obj.asp?id=1237658493348216989

Posted June 3, 2015 6:08 AM

by Capella05 moderator

The line coincides with the edge of a SDSS imaging field:

enter image description here

Posted June 3, 2015 5:50 PM

by joe_crx

Thanks for your response guys, good to know for future reference.

Posted June 3, 2015 9:11 PM