SIMBAD references

We report an astrometric position on SN2011dh/PTF11eon in M51 (ATEL #3398, #3399, #3401, #3402, #3405; CBET #2736), measured on a 4kx4k CCD frame taken with the 60/90 cm Schmidt telescope (resolution 1.01 arcsec/pixel, seeing ∼2.4 arcsec, FoV 70x70 arcmin) at Piszkéstetõ Mountain Station of the Hungarian Academy of Sciences,

on 2011 Jun 05.2 UT.

SN 2011dh is detected as a high signal-to-noise object with an estimated brightness of R = 14.26 ± 0.03 mag tied to USNO B1.0 magnitudes.

The astrometric solution, based on 377 USNO B1.0 reference stars within the same FoV (with measured standard deviation of 0.13 arcsec in both coordinates) provided the following position for the supernova: R.A. = 13:30:05.124 ± 0.003; Dec. = +47:10:11.301 ± 0.016.

We thank the staff of Konkoly Observatory for prompt scheduling of this high-priority observation.