Central Bureau for Astronomical Telegrams
CBAT "Transient Object Followup Reports"
TCP J18573095+1653396
TCP J18573095+1653396 2021 06 12.5484* 18 57 30.95 +16 53 39.6 8.0 U Her 0 0
2021 06 12.537
Discovered (mag. 8.4) by Seiji Ueda, Kushiro, Hokkaido, Japan, who found this star on three frames (limit mag.= 13.0) taken using Canon EOS 6D digital camera + 200-mm f/3.2 lens with 6-s exposure, who confirmed this star at mag. = 8.0 on three frames taken on 2021 June 12.548 UT with 0.16-m f/6.3 reflector, and also who writes nothing is visible at this location on three frames taken on 2021 June 10.5 UT with same digital camera. Ueda writes there is a faint star (Rmag.=17.5, GSC No.23331359631, 18 57 30.95, +16 53 39.2) near discovery position.
2021 06 12.642
Visually confirmed this nova suspect at reported position. Magnitude 6.4 at June 12.642 UT.
2021 06 12.642
Visual observation on June 12.642UT by Andrew Pearce (Nedlands, W.Australia)
2021 06 12.551
2021 06 12.551 Mag.=6.7 ( 180mm camera lens + CCD ) K.Itagaki
2021 06 12.1915
Apparently recorded on the rise (gmag. ~16.3 on June 12.192 UT) by the ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S and Kochanek et al. 2017PASP..129j4502K); no brightenings had been recorded by the ASAS-SN Sky Patrol since 2015 January 27; complete data and light curve at https://asas-sn.osu.edu/sky-patrol/coordinate/38e13fd8-40dc-47a3-bc0f-9940dc0d2b5b –– There is a previously known Zwicky Transient Facility (Masci et al., 2019PASP..131a8003M) transient ZTF19aasfsjq with position end figures 30.985s in RA and 39.55" in DEC (equinox J2000.0), light curve and data via Lasair (Smith et al., 2019RNAAS...3...26S) at https://lasair.roe.ac.uk/object/ZTF19aasfsjq/ —— Patrick Schmeer (Saarbrücken-Bischmisheim, Germany)
2021 06 12.698
follow-up : mag is +6.091U(Rmag) Comparison star UCAC-4 with 0.36m FLI ML1001E 10sec×10, obs by, Yasuo Sano(Nayoro Hokkaido, Japan) http://sn1997ef.web.fc2.com/sn/nova/2021-tcpj18573095_1653396nova.htm
2021 06 12.67
The likely progenitor is catalogued as Gaia source 4514092717838547584 (Gaia EDR3 position 18 57 30.983 +16 53 39.59; Gmag. 19.95) and as Pan-STARRS1 source PSO J185730.981+165339.527 (gmag. 20.48). Patrick Schmeer (Saarbrücken-Bischmisheim, Germany
2021 06 12.698
follow-up : mag is +6.091U(Rmag) Comparison star UCAC-4 with 0.36m FLI ML1001E 10sec×10, obs by, Yasuo Sano(Nayoro Hokkaido, Japan) http://sn1997ef.web.fc2.com/sn/nova/2021-tcpj18573095_1653396nova.html
2021 06 12.6917
Low-resolution optical spectrum obtained which shows no significant emissions above the noise level. Image here: bit.ly/3gjyjRm . Imaged with DSLR on 12.7090 June 2021 - mag 6.4 TG and reddish under high saturation. Image here: bit.ly/3gwAwr9 . Observer Rob Kaufman, White Cliffs, NSW, Australia (30.85 S, 143.09 E).
2021 06 12.6917
Low-resolution optical spectrum obtained which shows no significant emissions above the noise level. Image here: bit.ly/3gjyjRm . Imaged with DSLR on 12.7090 June 2021 - mag 6.4 TG and reddish under high saturation. Image here: bit.ly/3gwAwr9 . Observer Rob Kaufman, White Cliffs, NSW, Australia (30.85 S, 143.09 E).
2021 06 12.72375
Follow-up observation: 2021 Jun. 12.72375 (JD 2459378.22375) UT. Mag.= 6.24 TG +/-0.05 using Canon EOS 60D camera, focal length 44-mm, f/5. Filipp Romanov (Yuzhno-Morskoy, Nakhodka, Russia). My photo (stacked 32x10 sec.): https://www.flickr.com/photos/filipp-romanov/51242904498
2021 06 12.551
Not an independent discovery , K.Itagaki
2021 06 13.1543
We performed some follow-up of this object through a TEL 0.32-m f/8.0 reflector + CCD located in Nerpio, Spain and operated by iTelescope network (MPC Code I89). On images taken on June 13.15, 2021 we can confirm the presence of an optical counterpart with R-filtered CCD magnitude +6.2 at coordinates: R.A. = 18 57 30.98, Decl.= +16 53 39.6 (equinox 2000.0; Gaia DR2 catalogue reference stars for the astrometry). Our confirmation image: https://tinyurl.com/novaHer - An animation showing a comparison between our image and the archive POSS1 plate (1990-08-17): https://tinyurl.com/animationnovaher - by Ernesto Guido & Adriano Valvasori
2021 06 13.9340
Low-resolution optical spectrum shows broadband emission lines around the H-Balmer series. Spectrum obtained on June 13.934, 2021 with a 0.2-m telescope and Alpy600 spectrograph. Observer: Lorenzo Franco, Rome, Italy. Spectrum plot: https://digidownload.libero.it/A81_Observatory/Images/_tcpj18573095+1653396_20210613_934_LFranco.png
2021 06 14.399
Position end figures 30s.96, 39".5 measured with 0.61m f/6.5 reflector + CCD at Auberry, CA. J2000, Gaia DR2 positions. Photometry as follows: Jun. 14.399 UT V = 8.74 & Jun. 14.400 UT I = 7.03. Andrew Pearce, Nedlands, W. Australia
2021 06 14.7292
Follow-up observations remotely using 0.355-m f/6.2 Schmidt-Cassegrain telescope of Abbey Ridge Observatory (Canada): 2021 Jun. 13.09562 = 6.76 V; Jun. 13.09575 = 7.62 B; Jun. 14.10637 = 8.52 V; Jun. 14.10650 = 9.18 B. Filipp Romanov (Russia).
2021 06 16.00
mag 9.1U; 18 57 31.23 +16 53 36.4 focal length 195 mm f/2.8 lens + CCD sbig ST8300. Median stack = 3x30s. Observer F. Kugel, Banon 04, France.
