ATLAS18wbz (AT2018hdh) : discovery of candidate SN in UGC 03044
ATel #12093; K. W. Smith, S. J. Smartt, A. McCormack (Queen's University Belfast), L. Denneau, H. Flewelling, A. Heinze, J. Tonry, H. Weiland (IfA, University of Hawaii), B. Stalder (LSST) A. Rest (STScI), P. Clark, M. Fulton, O. McBrien, M. Magee, K. Maguire, D. O'Neill, S. Prentice, D. R. Young (Queen's University Belfast), D. E. Wright (University of Minnesota)
on 10 Oct 2018; 15:56 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Stephen Smartt (s.smartt@qub.ac.uk)
Subjects: Optical, Supernovae
ATLAS is a twin 0.5m telescope system on Haleakala and Mauna Loa which is
robotically surveying the sky above declination -40 with a cadence of 2 days
(Tonry et al. 2018, PASP, 13, 064505).
Two filters are used, cyan and orange (denoted c and o; all mags quoted are
in the AB system). While carrying out the primary mission for Near Earth
Objects, we search for and publicly report stationary transients to the
IAU Transient Name Server.
More information is on http://www.fallingstar.com. We are submitting
Astronomer's Telegrams for transients that are either within 100 Mpc,
or have some other interesting feature to bring to the community's
attention, such as bright nuclear transients, slowly rising or
rapidly fading objects.
We report a new transient source, most likely a supernova in the galaxy UGC 03044.
We discovered ATLAS18wbz (AT2018hdh) on MJD 58397.6 == 6 October 2018,
at m_c = 19.82 +/- 0.29. ATLAS18wbz is offset by 16.5 arcsec north 12.1 arcsec west
from UGC 03044 which is at z=0.017 or d=69 Mpc (from NED), implying an absolute magnitude of
M = -15.48 (assuming m-M = 34.40 and A_o = 0.91). A summary of the transient's properties are summarised below.
Follow up observations are encouraged.
Name | ATLAS Name | RA (J2000) | Dec (J2000) | Disc. Date | Disc Mag | Offset from host
AT2018hdh | ATLAS18wbz | 04:26:48.97 | +29:57:08.22 | 58397.6 | 19.82 o | 20.3 arcsec
This work has made use of data from the Asteroid Terrestrial-impact
Last Alert System (ATLAS) project. ATLAS is primarily funded to search
for near earth asteroids through NASA grants NN12AR55G, 80NSSC18K0284,
and 80NSSC18K1575; byproducts of the NEO search include images and
catalogs from the survey area. The ATLAS science products have been
made possible through the contributions of the University of Hawaii
Institute for Astronomy, the Queen's University Belfast, and the Space
Telescope Science Institute.
