SWIFT J1728.9-3613 IS A NEWLY DISCOVERED X-RAY TRANSIENT AND BLACK HOLE CANDIDATE. THE SOURCE IS NOW ENTERING QUIESCENCE FOLLOWING A MONTH'S LONG OUTBURST IN 2019. X-RAY IMAGING AND SPECTROSCOPY WITH CHANDRA SUGGEST INTERACTIONS WITH AMBIENT MEDIA ON SMALL ANGULAR SCALES AND MEERKAT OBSERVATIONS AT 1.28 GHZ REVEAL A RADIO BUBBLE OR POSSIBLE SUPERNOVA REMNANT ON LARGE ANGULAR SCALES. THE DETECTION OF A BLACK HOLE IN A REMNANT WOULD UPEND SOME PREVALENT IDEAS REGARDING BLACK HOLE BIRTH EVENTS. THE SENSITIVITY AND BROAD FILD OF VIEW AND OF XMM-NEWTON O.ER THE BEST CHANCE TO DETECT A PUTATIVE REMNANT IN X-RAYS. WE REQUEST A 10 KS OBSERVATION TO IMAGE THE FIELD AROUND SWIFT J1728.9-3613.