XRF 101117A

M. Akiyama, N. Ohmori, A. Daikyuji, Y. Nishioka, 
K. Noda, T. Kuramaru, M. Yamauchi (University of Miyazaki)

We have observed the field covering the error circle of
XRF101117A (MAXI trigger, GCN 11410
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 , Yamazaki et al.)
with the unfiltered CCD camera on the 30-cm telescope
at University of Miyazaki.
The observation was started 18:16:09 UT (about 10.7 hr
after the MAXI trigger time) on the condition with a little cloud.

We have compared our data of 30 sec exposures with the USNO-A2.0 catalog.
There is no new source at the reported position.
(GCN 11410
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 , K. Yamazaki et al. GCN 11418
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 , S. B. Cenko)

the upper limits are as follows:
---------------------------------------------------------------
Start(UT)  End(UT)   Num. of frames  Limit (mag.)
---------------------------------------------------------------
18:16:09   18:17:12         1         16.6
18:16:09   18:50:08        15         16.8
---------------------------------------------------------------

S. B. Cenko (UC Berkeley) and E. O. Ofek (Caltech) report on behalf of a
larger collaboration:

We have imaged the field of the MAXI/GSC X-ray transient XRF 101117A
(Yamazaki et al., GCN 11410
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 ) with the Palomar 48 inch Schmidt telescope as
part of the Palomar Transient Factory (PTF; Law et al., PASP, 121, 1395;
Rau et al., PASP, 121, 1334).  Images were obtained with a Mould R filter
beginning at 6:02 UT on 18 November 2011 (~ 22.5 hours after the MAXI/GSC
trigger) and cover > 90% of the reported localization region.

Comparison with pre-explosion images from the Digitized Sky Survey reveals
no new transient sources within the reported error box.  Referencing our
images to a series of point sources from the USNO-B1 catalog, we place a
limiting magnitude of R > 20 at this time.

K. Yamazaki (Chuo U.), M. Morii (Tokyo Tech), M. Serino (RIKEN), 
A. Uzawa, T. Matsumura (Chuo U.),
N. Kawai, K. Sugimori, R. Usui (Tokyo Tech),
T. Mihara, Y.E. Nakagawa, M. Sugizaki, T. Yamamoto, 
T. Sootome, M. Matsuoka (RIKEN), 
K. Kawasaki, S. Ueno, H. Tomida, M. Kohama, M. Ishikawa (JAXA),
A. Yoshida, K. Yamaoka,  S. Nakahira (AGU),
H. Tsunemi, M. Kimura (Osaka U.), H. Negoro, M. Nakajima
H. Ozawa, F. Suwa (Nihon U.), Y. Ueda, N. Isobe, 
S. Eguchi, K. Hiroi (Kyoto U.), A. Daikyuji (Miyazaki U.), 
report on behalf of the MAXI team:

At the scan transit centered at UT 2010-11-17 07:32:59
MAXI/GSC detected a short X-ray transient lasting about 32 seconds 
within the 60 seconds triangular transit response of MAXI/GSC.

Assuming the source constancy, we obtained the best fit position as
the following:

 (R.A., Dec) = (+89.63 deg, -2.30 deg) = (05 58 31, -02 17 59)(J2000)

We obtain a rectangular error box with the following corners:

 (R.A., Dec) = (+89.38 deg, -2.56 deg) = (05 57 30, -02 33 37)(J2000)
 (R.A., Dec) = (+89.27 deg, -2.21 deg) = (05 57  6, -02 12 25)(J2000)
 (R.A., Dec) = (+89.88 deg, -2.04 deg) = (05 59 32, -02 02 16)(J2000)
 (R.A., Dec) = (+89.99 deg, -2.39 deg) = (05 59 57, -02 23 24)(J2000)

This error box indicates statistical error with 90 percent confidence level,
and there is additional systematic uncertainty of 0.2 deg (90% containment radius).

The preliminary flux (4-10 keV) of the source was at least 200 mCrab.
There was no significant detection at the transit location in the
previous and following orbits (92 min before or after the detection) 
with an upper limit of 20 mCrab.  There is no known bright X-ray source 
at the detected position. 

Follow-up observations are encouraged.