Possible Supernova in IRAS 07171-6832
ATel #12256; D. Denisenko (SAI MSU), I. Denisenko, D. Fernandez Ortiz, K. Ionov, I. Spasic, D. Vdovin (Education Center on Donskaya, Moscow)
on 1 Dec 2018; 21:40 UT
Credential Certification: Denis Denisenko (d.v.denisenko@gmail.com)
Subjects: Optical, Supernovae, Transient
We report on the possible supernova in IRAS 07171-6832 = 2MASX J07170471-6837420 galaxy. The new object was discovered on the unfiltered images of the field centered at NGC 2397 obtained remotely with iTelescope.Net T31 instrument (0.50-m f/6.8 reflector + CCD) at Siding Spring on 2018 Dec. 01 at 16:04-16:08 UT. Since the object was located near the edge of 56'x56' T31 FOV, the additional confirmation images were taken on 2018-12-01 at 16:33-16:37 UT with the OT position at the center. The object is detected on both stacked images (3x60-sec exposures each) with the unfiltered magnitude of 17.1m. The OT position (J2000.0): R.A. = 07 17 04.32, Decl. = -68 37 37.3 which is 2" west and 5" north of the center of the host galaxy.
The galaxy is not present in NGC, PGC or ESO catalogs, despite being listed in USNO-A2.0 with ID 0150-04767427 (Bmag=10.3, Rmag=10.5) and GSC 09179-01270 (Pmag=11.42). 2MASS extended sources catalogue (IPAC/UMass, 2003-2006) provides the following magnitudes: J=12.83+/-0.05, H=12.26+/-0.07, K=12.03+/-0.11. Imperial IRAS-FSC redshift catalogue (Wang et al., 2009) gives the value of z=0.0214 for IRAS F07171-6832. Color-combined (JRIR) image of the host galaxy is uploaded to http://scan.sai.msu.ru/~denis/SN/IRAS07171-6832-JRIR.jpg (10'x10' FOV). The confirmation iTelescope T31 image is posted at the Transient Name Server page of AT 2018jgq.
The possible supernova was discovered during the after school astronomy classes at the Education Center on Donskaya (DNTTM). This is our first PSN discovery in 3 years of using the iTelescope instruments. Spectral confirmation is very welcome.
PSN 2018jgq on the Transient Name Server
