TCP J18573095+1653396: bright probable nova (mag. 6.4) in Hercules

SPK

Affiliation

Association Française des Observateurs d'Étoiles Variables (AFOEV)

Sat, 06/12/2021 - 16:14

TCP J18573095+1653396 = ZTF19aasfsjq (N:)
(submitted to VSX)

Discovered on 2021 June 12.537 UT at mag. 8.4 by Seiji Ueda (Kushiro, Hokkaido, Japan):
http://www.cbat.eps.harvard.edu/unconf/followups/J18573095+1653396.html

ZTF light curve, data, and images (via Lasair):
https://lasair.roe.ac.uk/object/ZTF19aasfsjq/

Possibly recorded on the rise (gmag. ~16.3 on June 12.192 UT) by the ASAS-SN Sky Patrol:
https://asas-sn.osu.edu/sky-patrol/coordinate/a611fda3-59f1-42fd-8e6d-386b21100256

Source No. 4514092717838547584 in Gaia EDR3 (Gmag. 19.95).

Spectroscopy and multiband photometry are urgently required.

Clear skies,
Patrick
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References:
All-Sky Automated Survey for Supernovae (ASAS-SN) Sky Patrol:
- Shappee et al., 2014ApJ...788...48S
- Kochanek et al., 2017PASP..129j4502K
Lasair:
- Smith et al., 2019RNAAS...3...26S
Zwicky Transient Facility (ZTF):
- Masci et al., 2019PASP..131a8003M

Bikeman

Affiliation

British Astronomical Association, Variable Star Section (BAA-VSS)

Sat, 06/12/2021 - 21:48

Early low res spectrum…

Early low res spectrum mentioned in CBAT doesn't see any prominent emission features.

I'm also now taking low res spectrum and can't see anything obvious. Is this to be expected in very young novae or are you supposed to see a Halpha line right away?

Cheers

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Filipp__Romanov

Affiliation

American Association of Variable Star Observers (AAVSO)

Sat, 06/12/2021 - 21:52

TCP J18573095+1653396: follow-up observation

Hello all!

I observed it from Yuzhno-Morskoy (near Nakhodka), Russia:

2021 Jun. 12.72375 6.24 +/-0.05 TG.

My photo: https://www.flickr.com/photos/filipp-romanov/51242904498 Canon EOS 60D camera, focal length 44-mm, f/5, ISO-3200, stacked 32x10 sec.

With best regards, Filipp.

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Filipp__Romanov

Affiliation

American Association of Variable Star Observers (AAVSO)

Sat, 06/12/2021 - 21:52

TCP J18573095+1653396

It seems to be getting brighter.

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Gustav__Holmberg

Affiliation

Svensk Amator Astronomisk Förening, variabelsektionen (Sweden) (SAAF)

Sat, 06/12/2021 - 22:21

Observed it tonight: 6.4 at…

Observed it tonight: 6.4 at 21:56UT 12 June 2021.

/Gustav

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Bikeman

Affiliation

British Astronomical Association, Variable Star Section (BAA-VSS)

Sat, 06/12/2021 - 22:29

you can report as TCP…

you can report as TCP J18573095+1653396

I'm not even sure it is technically already confiirmed to be a nova.

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Filipp__Romanov

Affiliation

American Association of Variable Star Observers (AAVSO)

Sat, 06/12/2021 - 23:06

Nova Her 2021

Confirmed: https://www.astronomerstelegram.org/?read=14704

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weo

Affiliation

American Association of Variable Star Observers (AAVSO)

Mon, 06/14/2021 - 21:22

N Her 2021 - AAVSO Alert Notice 745

AAVSO Alert Notice 745 reports on the very fast nova N Her 2021. Please see the notice for details and observing instructions.

There are threads for this object under the following forums:

- Novae: https://www.aavso.org/https://www.aavso.org/tcp-j185730951653396-bright-probable-nova-mag-64-hercules
- Cataclysmic Variables: https://www.aavso.org/bright-nova-hercules-tcp-j185730951653396
- Time Sensitive Alerts: https://www.aavso.org/tcp-j185730951653396-bright-probable-nova-mag-64-hercules (goes to thread in Novae forum)

Please subscribe to these threads if you are observing this nova so you can be updated as to its behavior and any observing campaigns on it. Join in the discussion or ask questions there!

Many thanks, and Good observing,

Elizabeth O. Waagen, AAVSO HQ