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Swift XRT position for SWIFT J1753.5-0127

ATel #547; D. N. Burrows, J. Racusin, D. C. Morris, P. Roming, M. Chester, R. La Verghetta (PSU), C. B. Markwardt (UMD/GSFC), S. D. Barthelmy (GSFC)
on 1 Jul 2005; 22:18 UT
Distributed as an Instant Email Notice Transients
Credential Certification: Craig B. Markwardt (craigm@lheamail.gsfc.nasa.gov)

Subjects: X-ray, Transient

Referred to by ATel #: 549, 550, 551, 558

The Swift BAT detected a new transient X-ray source (Palmer et al. ATEL #546), first detected by the BAT on 30 June 2005. At 21:20 UT on 1 July 2005 this source was uploaded to Swift as a Target of Opportunity. The XRT began observing this target in Manual State in Photon-Counting mode (count rate about 35 cps, which is highly piled-up), but was switched to Image mode and then put back into Windowed Timing mode. From the Image Mode image we obtain an on-board position for the source of:

RA(J2000) = 17h 53m 28.3s
Dec(J2000) = -01d 27' 09.3"

The estimated uncertainty is 6 arcseconds radius (90% containment).

The source was extremely bright, with count rates up to at least 200 cps (average count rate was about 130 cps).