[vsnet-alert 23071] Re: (cba:chat) ASASSN-19fd: more time-resolved photometry required

[Josch Hambsch]

Hi Berto,

 

In my case also both stars are measured due to the small separation.

 

Best regards,

 

Josch

 

From: cba-chat [mailto:cba-chat-bounces at cbastro.org] On Behalf Of Berto Monard
Sent: Sonntag, 17. März 2019 09:14
To: Patrick Schmeer; vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp; cba-chat at cbastro.org
Subject: Re: (cba:chat) [vsnet-alert 23069] ASASSN-19fd: more time-resolved photometry required

 

Hi,

 

Timeseries observations of ASASSN-19fd were done last night at KKO with a 30cm telescope f/8.

The closeness of the OT to a nearby brighter star made it impossible to apply photometry to the OT separately. The derived photometry was done on the blend, with a magnitude of 14.0CR. The magnitudes of the individual stars were estimated to be 14.6CR and 15.5CR for the neighbor star and the OT respectively.

 

A strongly reduced modulation was shown at a period 

P= 0.0582d +/- 0.0007

 

Observations with higher resolution telescopes will greatly improve the OT parameters. 

 

Berto Monard / CBA Kleinkaroo

 

Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986>  for Windows 10

 

From: Patrick Schmeer pasc1312-aavso at yahoo.de via vsnet-alert <mailto:vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp> 
Sent: Saturday, March 16, 2019 10:41 AM
To: vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp; vsnet-outburst at ooruri.kusastro.kyoto-u.ac.jp; cvnet-outburst at yahoogroups.com; baavss-alert at yahoogroups.com
Subject: [vsnet-alert 23069] ASASSN-19fd: more time-resolved photometryrequired

 

ASASSN-19fd  (UG:)

https://www.aavso.org/vsx/index.php?view=detail.top <https://www.aavso.org/vsx/index.php?view=detail.top&oid=686693> &oid=686693

 

Now also detected by Gaia and reported as Gaia19aza

(RA 17 03 19.29, DE -29 52 23.3):

http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia19aza/

 

More ASAS-SN Sky Patrol (Shappee et al. 2014ApJ

...788...48S and Kochanek et al. 2017PASP..129j4502K)

observations of this long outburst (superoutburst?):

https://asas-sn.osu.edu/light_curves/c4481545-e735-4fcb-bee3-523693977a9a

 

ASASSN-19fd 20190310.301 14.38g ASN

ASASSN-19fd 20190310.306 14.39g ASN

ASASSN-19fd 20190311.299 14.55g ASN

ASASSN-19fd 20190311.302 14.55g ASN

ASASSN-19fd 20190312.281 14.69g ASN

ASASSN-19fd 20190312.304 14.61g ASN

ASASSN-19fd 20190313.276 14.74g ASN

ASASSN-19fd 20190313.300 14.68g ASN

ASASSN-19fd 20190314.286 14.85g ASN

ASASSN-19fd 20190314.295 14.86g ASN

ASASSN-19fd 20190315.273 14.91g ASN

ASASSN-19fd 20190315.295 14.99g ASN

ASASSN-19fd 20190316.301 15.09g ASN

ASASSN-19fd 20190316.326 14.99g ASN

 

Josch Hambsch has already reported 128 observations

(from 2019 Mar. 9.307 to 14.392 UT) to AAVSO, but no

analysis has yet been provided:

https://www.aavso.org/apps/webobs/results/?star=ASASSN-19fd

 

*** Time-resolved photometry is still required. ***

 

Clear skies,

Patrick

 

 



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