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Gaia19edn: possible nova (12.3 mag) in Oph

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FRF
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Gaia19edn: possible nova (12.3 mag) in Oph

Gaia19edn (AT 2019qfj)

Alerting date: 2019-09-14 15:01:12

Alerting magnitude: 12.29

More details:

http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia19edn/
https://wis-tns.weizmann.ac.il/object/2019qfj

Precize photometry and scpectroscopy urgently needed

 

Clear skies,

Róbert Fidrich

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ASAS-SN light curve:

ASAS-SN light curve:

https://asas-sn.osu.edu/light_curves/c04780d4-c91f-4003-b4d0-a70aa166936c

The light curve is probable contaminated with a 15.7G mag (16.2V in APASS) star located only 8" from Gaia19edn. (That star is Gaia DR2 4060063199439915264 or USNO A2.0 0600-27892004.)

Gaia19edn 20190912.1428 <15.9g ASN
Gaia19edn 20190912.1441 <15.88g ASN
Gaia19edn 20190914.8551 <14.85g ASN
Gaia19edn 20190914.8787 <15.44g ASN
Gaia19edn 20190914.8811 <15.62g ASN
Gaia19edn 20190915.0962 <16.17g ASN
Gaia19edn 20190917.7911 <16.98g ASN

and even the positive detections on 20190915.7895 (16.075g) and on 20190915.8512 (15.51g) have large errors (0.191 and 0.162 respectively).

Thus I assume this nova candidate might be highly reddened.

Clear skies,

Robert

FRF
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90s with I filter

90s with I filter using T30 of itelescope.net, Siding Spring. Very bright in I-band.

FRF
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90s with V filter

90s with V filter using T30 of itelescope.net, Siding Spring. Obviously very red.
Photometry will be done later. An AAVSO sequence is needed.

FRF
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Preliminary photometry: 17.04V

Preliminary photometry:

Gaia19edn: 20190919.3916 UT 17.04V (using APASS V comp stars).

FRF
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Preliminary photometry: 11.79I

Preliminary photometry:
Gaia19edn: 20190919.3937 UT 11.79I  --> V-I~5.2 mag.

 

FRF
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New AAVSO sequence soon.

New AAVSO sequence created. It will be available via VSP soon.

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AAVSO chart
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