Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

TCP J08144930-2215000

TCP J08144930-2215000   2021 04 09.4959*  08 14 49.30 -22 15 00.0  14.5 C             Pup       0 9

2021 04 09.4959

Discovered by Yuji Nakamura, Kameyama, Mie, Japan, on two frames (30-s exp. limiting mag 15.5) taken by 0.10-m F3.0 reflactor + CMOS camera. Nothing is visible at this location on the frames taken on 2021 Mar. 25.5148 UT (30-s exp. limiting mag 15.5) by same instrument. The object is located very close to a object listed on Pan-STARRS DR1 catalogue (R.A. = 08h 14m 49s.21, Decl. = -22d 15' 00".7 (J2000.0), gmag = 21.56, rmag = 21.47). The transient was also detected by the ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S and Kochanek et al. 2017PASP..129j4502K): 2021 Apr. 7.229 UT, fainter than gmag. 16.2; April 8.878 UT, gmag. 14.3.

2021 04 08.8776

Actually an (automatic) ASAS-SN alert was issued only at 02:36 UT on 2021 April 10, after Nakamura-san had reported his discovery here (albeit ASAS-SN Sky Patrol magnitude data had been publicly available already earlier). No previous outburst of this object was recorded by the ASAS-SN Sky Patrol since 2012 February 14 / 2014 December 16; complete data and light curve at https://asas-sn.osu.edu/sky-patrol/coordinate/8d37cde6-b858-4634-8b32-a4c192f5d1b5 —— TCP J08144930-2215000 is probably a large-amplitude (WZ Sagittae-type?) dwarf nova outburst, so time-resolved photometry is encouraged. Patrick Schmeer (Saarbrücken-Bischmisheim, Germany)