[vsnet-alert 8779] Re: NLMC'05 slowly fading

[Bernard Heathcote]

Hola Bill,
I measured NLMC'05 again on 22 Dec and found it had brightened by 0.27 (V) 
mag. Is this common nova behaviour?

Dec 22.5014    JD 2453727.0014    R=12.33 +/-0.03
Dec 22.5056    JD 2453727.0056    R=12.81 +/-0.01

Bernard Heathcote
Cielos claros y oscuros!


----- Original Message ----- 
From: "W.Liller" <wliller at compuserve.com>
Sent: Friday, December 23, 2005 2:34 AM
Subject: [vsnet-alert 8778] NLMC'05 slowly fading


Hola Everyone -

Here are three more recent magnitudes for NLMC'05.  In chronological order:

Taken by Fabio H. Carvalho of Assis-SP, Brazil with a Kodak Dx7620 digital
camera and a 254mm f/6 Newtonian.  Image kindly sent to me by Raquel Shida.
 Reduced by W Liller using the standards supplied by Morel:

Dec. 18.9868    JD 2453723.4868   V = 13.04 +/- 0.03 (est)

Sent to me by Bernard Heathcote of Glenhope, Victoria, Australia:

Dec. 19.5396    JD 2453724.0396 V = 13.08 +/- 0.01

Observation by W.Liller, again using standards supplied by Morel:

Dec. 20.0994    JD 24533724.5994        V = 13.14 +/- 0.05.

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

I also append the text of an e-mail that I sent to Arne Henden of the AAVSO
on Dec 12:

        All the best to all,    Bill Liller

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Convinced as I now am that Morel's stars at V = 12.56 and 11.42 are not
seriously variable, I have redone the reductions.  I send you herewith my
revised V mags for N LMC '05.  For these I used five comparison stars from
Morel's list identifiable from their V mags, namely 11.42, 12.13, 12.56 and
13.29; plus one from Guide 8/Tycho with V = 11.52.  And for one night -- 
Dec 9 -- just to make a thorough check, I used a total of 12 stars with
published Vs.

Here are the revised magnitudes.  (Anre:  I've also listed mags just
received from Bernard Heathcote and Peter Nelson.  Thank you both !)

-------------------------
                        Liller revised  Heathcote (H), Nelson (N)

Nov 29.066    JD 2453703.566  12.90 (CCD, n.f.)

Dec 3.870       ----         ----               H('JD 708.170):   12.57

Dec 4.071     JD 2453708.571   V = 12.43        N(Dec 4.484): 12.51

Dec 5.077    JD 2453709.577    V = 12.29        N(Dec 5.469): 12.07

Dec 6.067    JD 2453710.567    V = 12.18

Dec 7.093    JD 2453711.593     V = 12.44       H('JD 712.208): 12.61

Dec 8.066    JD  2453712.566    V = 12.73

Dec 9.124    JD  2453713.624     V = 12.65      H('JD 714.100):  12.55

Here, copied from the emails received today:

Heathcote
3 Dec    JD 2453708.170116    V=12.57 +/-0.01
7 Dec    JD 2453712.207801    V=12.61 +/-0.01
7 Dec    JD 2453712.217431    R=12.23 +/-0.01
9 Dec    JD 2453714.099954    V=12.55 +/-0.01

Nelson
Nov 27.5660  CCDV=12.90, B-V=0.67
Dec 04.4836  CCDV=12.51
Dec 05.4691  CCDV=12.07, B-V=0.27


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