V1494 Aql: In decline phase
Oscillations
In the early January, V1494 Aql = Nova Aql 1999 No. 2, which had continued
fading trend, was reported to be brightening to 7.6mag
(vsnet-alert 3971).
And then, it returned to fading phase
(vsent-alert 4115).
After the magnitude reached to 9.2-9.4mag, the object again showed
temporal re-brightening to 8.0mag on February 8
(vsnet-alert 4156).
After that, the fading trend became more rapid
(vsnet-alert 4266).
P. Schmeer and the other observers reported a sudden brightening
to 8.3mag on March 2.215
(vsnet-alert 4319,
vsnet-alert 4327),
followed by the normal decline. On March 14, another brightening (8.8mag)
was reported by B. H. Granslo and P. Schmeer et al.
(vsnet-alert 4395,
4396,
4399,
4410).
On March 31, it again became bright (8.4mag) as reported by M. Verdenet
(vsnet-alert 4516,
4569,
4576).
Periodic modulations
L. Cook also detected
the periodic variation (P=91min) and the amplitude of about 0.04mag
(vsnet-campaign 222).
A. Retter reported the main results through 14 nights observations by
R. Novak and L. Cook: there is a very strong signal at 14.86 c/d=1.62 h.
It is near a 1-d alias of the periodicity previously reported to the IAUC.
The full amplitude was slightly increased and was nearly 0.10 mag.
There might be other periodicities, however, to establish their presence,
more data is needed
(vsnet-campaign 207,
vsnet-campaign-nova 52).
The data observed by L. Cook on JD2451711 - 2451755 can be seen in
[vsnet-campaign-nova 73].
The nightly averaged data observed by L. Cook can be seen in
[vsnet-campaign-nova 78].