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NSV 35

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pukemaru
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NSV 35

This star is in Tucana and a fair way south (00:06:33.51 -69:00:33.7). Is anyone able to confirm its current magnitude. I got it at 13.3 last night. I have NEVER seen it this bright before, and it's brighter than the listed maximum. The brightest I have seen is 138.

Thanks

Stephen [HSP]

SPK
SPK's picture
Dwarf nova NSV 35 in outburst

Could you please post your recent observations of NSV 35 here, Stephen?

pukemaru
pukemaru's picture
NSV 35 recent observations

The first 4 are with my 28"
2017 Oct 15.415       13.3
2017 Sept 14.450     15.1
2017 Jul 28.750        15.1
2017 May 01.340     <15.4
All previous observations were with my 12" <147 except for this one.
2016 Jan 13.430     138
NB Rod Stubbings recorded it at 14.3 2016 Jan 16.541

File upload: 
WGR
WGR's picture
Post data in AID?

Hello All

It would be great if observers of this object could upload their data to the AID.  I would like to look at it in Vstar.

Gary

pukemaru
pukemaru's picture
NSV 35

This has to be a super outburst. Rod Stubbings confirmed my observation recording it at 13.0 last night. Unfortunately I was clouded out (again).

Stephen

mgw
mgw's picture
NSV 35 at V=12.73 and B=12.75

Just measured this at B = 12.75 and V= 12.73

stubbo
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NSV 35

I had NSV 35 at 12.6 visual tonight.

NSV 35 171017.471  12.6

pukemaru
pukemaru's picture
NSV 35

How interesting. I have a couple of questions.

(i) Could it be that this star has risen to such levels before but not been very well observed being at -69°? There have only ever been 79 visual observations, most by Rod Stubbing.

(ii) Or if not that, then has some change occurred in the behaviour of this star to cause it to rise so dramatically?

In the paper by Augusteijn, Tappert, Dall & Maza, "Cataclysmic variables from the Calan-Tololo Survey – II Spectrocopic periods (listed in VSX) the star is listed as CTCV J0006-6900. "We also note that CTCV J0006−6900 likely can be identified with the variable AN 97.1933 discovered by Luyten (1933) from a plate survey of the southern sky. For this variable a brightness range of B ∼ 14.5–16.5 mag is reported, which indicates relatively small amplitude outbursts which is also consistent with the high inclination estimated for this source (see Section 4). The source was also detected on various occasions in a bright state by the All Sky Automated Survey (ASAS; Pojmanski 2002). "

Stephen [HSP]

SPK
SPK's picture
NSV 35: new SU UMa-type dwarf nova (vsnet-alert 21533)

NSV 35 (UGSU)
https://www.aavso.org/vsx/index.php?view=detail.top&oid=38659

A bright superoutburst was detected on 2017 October 15 by Stephen Hovell.

Visual magnitude estimates:
20171015.426 133 (Stephen Hovell)
20171016.465 130 (Rod Stubbings)
20171017.471 126 (Rod Stubbings)
20171018.478 126 (Rod Stubbings)

AAVSO observer Gordon Myers (MGW) recorded a superhump on 2017 October 18.41 UT and another one on 21.41 UT: https://www.aavso.org/apps/webobs/results/?star=NSV%2035&num_results=200

Further time-resolved photometry is strongly recommended.

Clear skies,
Patrick

pukemaru
pukemaru's picture
NSV 35

Hi everyone. NSV 35 is brightening again. I recorded it as follows:
20171106.361 157
20171108.467 159 (it’s been sitting there for a while now)
20171110.464 145

Please could someone check if you get the chance. Our weather has been so erratic I was lucky to see anything last night.

Stephen [HSP]

SPK
SPK's picture
NSV 35 outburst confirmed the following night

Hi Stephen,

Following your Nov. 10 observation NSV 35 was observed by Rod Stubbings at mv= 14.2 on Nov. 11.472 UT (vsnet-outburst 21467).

Patrick

hambsch
hambsch's picture
NSV35 on the rise

Hi,

I am observing this star since its last outburst nightly and have seen it rising two nights ago. Last nights images are still being analysed before sending to AAVSO, VSNET.

All data are with the AAVSO.

Josch

mgw
mgw's picture
NSV 35 between 15 and 15.4 on 20171112

Measured last night between 15 and 15.4 V during one hour run.  Looks like short echo finished...

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