Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

TCP J09370380+1657350

TCP J09370380+1657350   2021 01 07.7850*  09 37 03.80 +16 57 35.0  14.5 U             Leo       9 0

2021 01 07.7850

Discovered by Yuji Nakamura, Kameyama, Mie, Japan, on four frames (30-s exp. limiting mag 16.0) taken by 10cm/F3.0 refractor and CMOS camera. Nothing is visible at this location on a frame taken on 2020 Dec. 26.6818 UT (30-s exp. limiting mag 15.5) by same instrument.

2021 01 07.1840

The likely progenitor is PSO J093703.717+165735.563 at RA 09 37 03.71 DE +16 57 35.5 (J2000.0; gmag. 21.16, rmag. 21.07, imag. 21.15). Other designations are ASAS J093704+1657.6, MLS_J093703.7+165735, CSS_J093703.7+165735, GSC2.3 N8Z0011656 (Bjmag. 21.2), SDSS J093703.70+165735.6, GALEX J093703.7+165735 (NUVmag. 21.1), and GALEX J093703.8+165735 (FUVmag. 21.5, NUVmag. 21.1). Recent ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S and Kochanek et al. 2017PASP..129j4502K) data for this transient: 2021 January 6.359 UT, fainter than gmag. 16.6; 7.184 UT, gmag. 14.70; 7.185, 14.78; 7.187, 14.76. The ASAS-SN Sky Patrol recorded no previous brightenings since 2012 January 29. Patrick Schmeer (Saarbrücken-Bischmisheim, Germany)

2006 03 26.18

A previous (long) outburst in 2006 March–April was recorded by CRTS (as MLS_J093703.7+165735 and CSS_J093703.7+165735) on 2006 March 26.18 UT (CVmag. 13.5) and April 19.15 UT (CVmag. 16.2) and by ASAS-3 (as ASAS J093704+1657.6) on 2006 March 27.13 UT (Vmag. 13.7) and March 29.16 UT (Vmag. 14.1). According to ASAS-3 and MLS data that likely superoutburst started on 2006 March 25. Patrick Schmeer (Saarbrücken-Bischmisheim, Germany)

2021 01 08.501

Mag.= 15.1, position end figures 03s.69, 35".8 observed by T. Noguchi, Katori, Chiba-ken, Japan, using 0.23-m f/10 Schmidt Cassegrain + unfiltered CCD (KAF-0261E), An image at http://park8.wakwak.com/~ngc/images/TCPinLeo_20210108.jpg.