(CCD image taken at Kyoto University)
(CCD image taken by G. Masi)
Possible Nova in Pup
Kazuyoshi Kanatsu (Matsue, Shimane, Japan) reports the discovery of a new variable star, which is likely a nova based on the absence of apparent counterparts on his previous image, DSS and 2MASS. Kanatsu reports no apparent movement between his two exposures and no registered minor planet at this position.
The coordinates reported by Kanatsu are:
RA 07h 37m 58s
DE -25d 56m 51s
(J2000.0)
The object is located 50" NE of GSC6543.2322.
Confirmatory observations and, if confirmed, spectroscopy are very urgently requested.
We use the tentative designation PUPnova2000 in this report.
object YYYYMMDD(UT) mag code PUPnova2000 20000115.719 <117p Knk.VSOLJ PUPnova2000 20001222.731 87p Knk.VSOLJ PUPnova2000 20001222.733 86p Knk.VSOLJ seq:Tycho,GSC instruments:f200mm+PO0(T-MAX400(120)) observer:Kazuyoshi Kanatsu
Possible Nova in Pup: prediscovery observations by Takamizawa
Kesao Takamizawa (Nagano, Japan) reports the following prediscovery observations on his patrol films. Takamizawa reports that the object was not recorded on 22 films (limiting magnitude 14) between 1994 March 14 and 1999 December 3. Takamizawa reports the presence of a close companion of 14.5 mag.
object YYYYMMDD(UT) mag code
PUPnova2000 19991203.790 <140p Tmz.VSOLJ
PUPnova2000 20001128.703 86p Tmz.VSOLJ
PUPnova2000 20001222.578 88p Tmz.VSOLJ
Observer's code:
Tmz: K.Takamizawa (Saku-machi,Nagano,Japan)
SASS (Saku All Sky Survey)
Inst.: 10cmR F4 twin patrol cameras T-Max400 120
Possible Nova in Pup: CCD photometry by Takao
Akira Takao (Kitakyushu-City, Fukuola-Pref., Japan) reports the following confirmatory observation tonight. The unfiltered CCD magnitude was determined using the Tycho-2 comparison star.
object YYYYMMDD(UT) mag code
PUPnova2000 20001230.585 88C Toa.VSOLJ
compared to 073755.8 -255937 (2000.0) 874 0.30 TYC2-6543.2917.1
instruments:200mm F4 Telephotolens+ST-8,unfiltered
Observer's code:
Toa: Akira Takao (Kitakyushu-City,Fukuola-Pref., Japan)
drtakao@bronze.ocn.ne.jp
Selected comparison stars from Hipparcos/Tycho:
V B-V
073839.6 -261859 (2000.0) 713 -0.09 TYC2-6547.2624.1 (7.12 0.01) (7.01 0.01)
073532.5 -260913 (2000.0) 773 -0.05 TYC2-6543.473.1 (7.73 0.01) (7.67 0.01)
073912.1 -252642 (2000.0) 826 -0.06 TYC2-6543.1948.1 (8.25 0.01) (8.18 0.02)
073755.8 -255937 (2000.0) 874 0.30 TYC2-6543.2917.1 (8.78 0.01) (9.13 0.01)
073702.5 -255113 (2000.0) 878 0.11 TYC2-6543.3212.1 (8.79 0.01) (8.92 0.01)
073706.4 -255557 (2000.0) 918 0.20 TYC2-6543.2220.1 (9.20 0.01) (9.43 0.02)
073802.7 -260046 (2000.0) 988 -0.04 TYC2-6543.2924.1 (9.87 0.02) (9.82 0.02)
073758.8 -255747 (2000.0) 1040 0.06 TYC2-6543.2322.1 (10.41 0.03) (10.49 0.03)
(vsnet-alert 5481)
These stars extracted from my photometric reference file should help extend the calibration near the nova to fainter limits for wide-field images and allow local zero-point adjustment of GSC and USNO-Ax.x magnitudes closer to the object. I note that GSC magnitudes are a few tenths fainter than V in this area.
\Brian
Name RA (2000) Dec GSC V B-V LF12 39 7 39 42.8 -26 28 03 6547-2012 10.37 1.13 LF12 26 7 37 57.2 -25 33 41 6543-2074 10.39 0.28 LF12 7 7 35 04.6 -26 15 10 6547-0059 10.65 0.10 LF12 53 7 41 44.0 -26 15 14 6548-2407 10.86 1.04 LF12 43 7 40 13.2 -26 35 57 6547-2182 11.45 0.08 LF12 19 7 37 17.0 -24 22 17 6539-3128 11.53 1.15 LF12 54 7 41 46.8 -25 34 36 6544-0950 11.54 1.10 Loden 2 3 7 41 02.4 -24 09 04 6540-4412 11.60 0.02 LF12 44 7 40 32.4 -26 53 41 6548-3449 11.67 1.18 Loden 2 4 7 41 04.7 -24 09 06 6540-3880 11.80 1.07 LF12 12 7 36 38.4 -26 05 11 6543-3321 12.19 0.45 LF12 13 7 36 50.1 -26 07 40 6543-3227 12.26 0.11 Loden 2 12 7 40 53.6 -24 17 12 6540-4155 12.38 0.16 Loden 2 11 7 40 59.4 -24 16 21 6540-2650 12.67 0.34 Loden 2 10 7 41 05.9 -24 14 58 6540-3952 12.98 0.55 Loden 2 14 7 40 43.6 -24 14 37 6540-4295 13.52 0.17
For visual observers we have placed a chart (2.5 x 3 degrees) of the possible nova in Puppis with comparison stars from Hipparcos/Tycho down to 11th magnitude at the following URL: http://www.shopplaza.nl/astro/vs-charts/novapuppis.htm
Reinder Bouma/Edwin van Dijk
Chart with Henden V-sequence (Japan Variable Stars Study Association)
Wide-field chart
Charts with Hipparcos/Tycho magnitudes:
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