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[vsnet 655] Nova Cassipeiae 1995 - photometry update no. 13 (diff.)
- Date: Fri, 14 Jun 96 23:14:32 +0200
- To: varstars@lists.funet.fi, vsnet@kusastro.kyoto-u.ac.jp
- From: b.h.granslo@astro.uio.no
- Subject: [vsnet 655] Nova Cassipeiae 1995 - photometry update no. 13 (diff.)
- cc: nova@nova.la.asu.edu
- Sender: owner-vsnet@kusastro.kyoto-u.ac.jp
0100
0110 Nova Cassiopeiae 1995 - Photometry Update No. 13 (1996/06/14)
0120 =============================================================
0130
0140 Type: NB? Magnitude: 7.1 [V] - 18 [R] Spectrum: Pec(N)
0150
0160 This nova was discovered by Minoru Yamamoto (Okazaki, Aichi, Japan)
0170 on exposures from 1995 Aug. 24 [IAUC 6213]. Robert Argyle, Royal
0180 Greenwich Observatory, England, has reported the following accurate
0190 position (equinox J2000.0, FK5 reference frame, epoch 1995.69):
0200
0210 R.A. = 01h 05m 05s.353 Decl. = +54d 00' 40".12 [IAUC 6233]
0220 +/- 0s.004 +/- 0".07
0230
0240 It is based on 10 observations with the Carlsberg Automatic Meridian
0250 Circle on La Palma by C. Fabricius and M. Vallejo. The corresponding
0260 position for equinox B1950.0 is RA = 01h 02m 07s, Decl. = +53d 44'.6.
0690
0700 As noted by Taichi Kato [vsnet-alert 440] this nova has shown three
0710 distinct brightenings so far:
0720
0730 date of maximum mv date of maximum mv date of maximum mv
0740 ------------------------------------------------------------------
0750 1995 Dec 15 6.9 1996 Feb 17 7.7 1996 Apr 11 8.1
0760
0770 He noted that these mini-outbursts were almost equally separated
0780 by two-month intervals, and that another such phenomenon may take
0790 place within short time. Since late-April the nova has faded slowly
0800 to near magnitude mv = 10.0, i.e. the nova remained within 3 magni-
0810 tudes from maximum for about 10 months (300 days). The light curve
0820 of this slow nova has otherwise shown strong similarities to the
0830 bright nova in Delphinus in 1967 (HR Del).
0870
0880 - - -
0890
0900 This report contains photometric observations of Nova Cas 1995. New
0910 entries since Report No. 12 (1996 Feb 20) are labelled by an asterisk
0920 (*), while revised data are identified by a cross (#). A dollar sign
0930 ($) identifies the discovery observation.
0940
0950 The abridged version of this document, which only contains selected
0960 observations since Report No. 12, is sent to the VARSTARS, VSNET and
0970 NOVA distribution lists, and the Usenet news groups
0980 'sci.astro.amateur' and 'sci.astro.research'. The full version is
0990 available upon email request or from the following ftp sites:
1000
1010 ftp://ftp.kusastro.kyoto-u.ac.jp/pub/vsnet/Novae/nova_cas95/
1020 ftp://medusa.uio.no/pub/bgranslo/variable/n1995cas/
1030
1040 Alternatively one may use the following WWW sites:
1050
1060 http://www.kusastro.kyoto-u.ac.jp/vsnet/
1070 http://www.uio.no/~bgranslo/index.html
1090
1100 Magnitude systems [MS]
1110 mv Visual
1160 V Photoelectric Johnson V
1280
1290 Sequences [SEQ]:
1360 AN AAVSO (b) and (d) charts, via AAVSO Alert Notices 213 and
1370 218 (photoelectric sequences from various sources)
1380 HI Hipparcos Input Catalogue (Turon et al., 1992)
1390 MU Mean UBV Catalogue (Mermilliod & Mermilliod, 1994)
1410 SK Photoelectric (V, b-y) sequence by B. Skiff (see below)
1450 SG UBV sequence by V. Goranskij and S. Shugarov (see below)
1470 *HM Combination of HI and MU
1480 PE Photoelectric sequence (unspecified or combinations of
1490 SK, HI, MU etc.)
1500
1510 Instrumentation and notes [REMARKS]:
1520 Apertures (or focal lenghts) in centimeters and magnifications.
1530 Types: R = refractor; L = Newtonian reflector, B = binoculars, T =
1540 Schmidt-Cassegrain reflector; M = Maksutov-Cassegrain reflector; A =
1550 camera objective (the focal length is given). Measuring devices are
1560 CCD camera (CCD) and photoelectric photometer (PEP).
1590
1600 Sources:
1610 [IAUC xxxx] International Astronomical Union Circular No. xxxx
1660 [vsnet-obs xxxx] Distribution list 'vsnet-obs' message no. xxxx
1670 [vsnet-alert xxx] Distribution list 'vsnet-alert' message no. xxx
1680 [vsnet xxx] Distribution list 'vsnet' message no. xxx
1700 *[AAVSO NEWS FLASH xxx] AAVSO News Flash No. xxx
1710 (this report) observations not previously reported (to VSNET)
1770
1780 Time system is year, number of month and date with decimals in U.T.
1790
1800------------------------------------------------------------------------
1810 YYYY+
1820 MM DD.DDD MAGN MS SEQ OBSERVER REMARKS SOURCE
1830------------------------------------------------------------------------
1840
1996 02 20.854 8.7 mv AN *Andersson, K.-G. 9.0 M [vsnet-obs 2202]
1996 02 21.8330 8.265V SG *Metlova, N. V. 60 L + PEP [vsnet-obs 2184]
1996 02 22.507 8.4 mv *Makiguchi, N. 25 L [vsnet-obs 2181]
1996 02 23.789 8.5 mv PE *Schmeer, P. 20.3 T [vsnet-obs 2215]
1996 02 24.500 8.5 mv HI *Yamamoto, M. 10 L (30x) [vsnet-obs 2262]
1996 02 25.750 8.6 mv *Fidrich, R. 6.0 B (20x) [vsnet-obs 2240]
1996 02 26.77 8.6 mv AN *Vollmann, W. 10 L [vsnet-obs 2419]
1996 02 27.455 8.5 mv SK *Onodera, O. 15 L [vsnet-obs 2234]
1996 02 28.996 8.7 mv *McKenna, J. 28 T [vsnet-obs 2238]
1996 02 29.76 8.8 mv PE *Midtskogen, O. 31.6 T (62x) [vsnet-obs 2927]
1996 03 01.8644 8.911V SG *Shugarov et al. 70 L + PEP [vsnet-obs 2521]
1996 03 02.752 8.7 mv SK *Linander, S. 10.2 T (40x) [vsnet-obs 2325]
1996 03 03.427 9.0 mv SK *Yamamoto, M. 10 L (30x) [vsnet-obs 2498]
1996 03 04.77 9.0 mv *Zajacz, G. 6.3 R [vsnet-obs 2284]
1996 03 05.478 9.0 mv SK *Nishimura, T. 16 L [vsnet-obs 2292]
1996 03 06.87 8.9 mv SK *Mediaas, I. B. 30.0 L [vsnet-obs 2543]
1996 03 07.768 9.1 mv *Moeller, M. 15.2 L [vsnet-obs 2306]
1996 03 08.790 9.0 mv *Diepvens, A. 15 R [vsnet-obs 2319]
1996 03 09.815 9.1 mv *Vanmunster, T. 35 L [vsnet-obs 2341]
1996 03 10.7454 8.918V SG *Karitskaya, E.A. 70 L + PEP [vsnet-obs 2521]
1996 03 11.974 9.1 mv PE *Granslo, B. H. 20.3 T (80x) [vsnet-obs 2365]
1996 03 12.844 9.0 mv *Broens, E. 35 L [vsnet-obs 2374]
1996 03 13.83 9.1 mv *Lange, T. [vsnet-obs 2385]
1996 03 14.85 9.2 mv SK *Riibe, K. 28.0 T [vsnet-obs 2543]
1996 03 15.817 9.1 mv *Vanmunster, T. 35 L [vsnet-obs 2405]
1996 03 16.7126 8.964V SG *Goranskij, V.P. 70 L + PEP [vsnet-obs 2521]
1996 03 17.819 9.0 mv *Poyner, G. [vsnet-obs 2409]
1996 03 18.821 9.1 mv *Jensen, L. T. 33.3 L [vsnet-obs 2414]
1996 03 19.802 8.9 mv AN *Skalak, P. 25 L [vsnet-obs 2458]
1996 03 20.8700 9.136V SG *Karitskaya et al.70 L + PEP [vsnet-obs 2521]
1996 03 21.174 9.2 mv *Diepvens, A. 15 R [vsnet-obs 2448]
1996 03 22.92 9.2 mv SK *Riibe, K. 28.0 T [vsnet-obs 2543]
1996 03 23.96 8.9 mv *Baransky, A. R. [IAUC 6358]
1996 03 24.7417 8.953V SG *Goranskij, V.P. 70 L + PEP [vsnet-obs 2521]
1996 03 25.444 9.0 mv *Nishimura, T. 16 L [vsnet-obs 2503]
1996 03 26.796 8.9 mv SK *Linander, S. 10.2 T (80x) [vsnet-obs 2542]
1996 03 27.799 9.0 mv *Lange, T. [vsnet-obs 2485]
1996 03 28.87 9.0 mv AN *Pereira, A. 25 L [vsnet-obs 2502]
1996 03 29.837 9.2 mv *Day, J.S. [vsnet-obs 2495]
1996 03 30.893 8.9 mv *Diepvens, A. 15 R [vsnet-obs 2499]
1996 03 31.819 9.4 mv *Schmeer, P. [vsnet-obs 2588]
1996 04 01.854 8.9 mv PE *Granslo, B. H. 20.3 T (77x) [vsnet-obs 2543]
1996 04 02.90 9.3 mv SK *Midtskogen, O. 31.6 L (130x) [vsnet-obs 2927]
1996 04 03.846 9.2 mv *Poyner, G. [vsnet-obs 2515]
1996 04 04.828 9.4 mv *Myra, J.-E. 25.4 T [vsnet-obs 2927]
1996 04 05.431 9.4 mv SK *Kato, T. [vsnet-obs 2522]
1996 04 06.800 9.2 mv *Van Der Looy, J. 6.0 B (20x) [vsnet-obs 2545]
1996 04 07.800 9.4 mv *Fidrich, R. 6.0 B (20x) [vsnet-obs 2554]
1996 04 08.9243 9.2 mv AN *Biesmans, M. 30.5 T [vsnet-obs 2538]
1996 04 09.84 9.1 mv AN *Vollmann, W. 8.0 B (20x) [vsnet-obs 2808]
1996 04 10.0875 8.9 mv *Berg, R. [AAVSO NEWS FLASH 12]
1996 04 10.858 9.2 mv *Poyner, G. [vsnet-obs 2558]
1996 04 11.067 8.5 mv PE *Granslo, B. H. 20.3 T [vsnet-obs 2927]
1996 04 11.831 8.0 mv *Myra, J.-E. 25.4 T [vsnet-obs 2927]
1996 04 11.995 8.3 mv PE *Granslo, B. H. 20.3 T (80x) [vsnet-obs 2927]
1996 04 12.426 8.3 mv *Shirota, E. [vsnet-obs 2714]
1996 04 12.85 8.5 mv PE *Midtskogen, O. 31.6 L (62x) [vsnet-obs 2927]
1996 04 13.13 8.5 mv *Comello, G. [AAVSO NEWS FLASH 12]
1996 04 14.026 8.5 mv PE *Granslo, B. H. 20.3 T (80x) [vsnet-obs 2927]
1996 04 15.128 8.7 mv *Diepvens, A. 15 R [vsnet-obs 2605]
1996 04 15.9056 8.8 mv AN *Biesmans, M. [vsnet-obs 2601]
1996 04 16.811 8.7 mv *Lange, T. [vsnet-obs 2622]
1996 04 17.841 8.8 mv SK *Linander, S. 10.2 T (80x) [vsnet-obs 2698]
1996 04 18.813 8.9 mv AN *Skalak, P. 25 L [vsnet-obs 2649]
1996 04 19.88 9.4 mv SK *Midtskogen, O. 31.6 L (62x) [vsnet-obs 2927]
1996 04 20.863 9.4 mv *Poyner, G. [vsnet-obs 2647]
1996 04 21.833 9.3 mv *Van Der Looy, J. 6.0 B (20x) [vsnet-obs 2694]
1996 04 22.846 8.9 mv *Diepvens, A. 15 R [vsnet-obs 2660]
1996 04 23.826 9.3 mv AN *Skalak, P. 25 L [vsnet-obs 2670]
1996 04 24.785 9.0 mv SK *Kato, T. 6 R [vsnet-obs 2668]
1996 04 25.818 9.3 mv AN *Skalak, P. 25 L [vsnet-obs 2682]
1996 04 26.886 9.4 mv *Poyner, G. [vsnet-obs 2681]
1996 04 27.776 9.3 mv SK *Watanabe, T. [vsnet-obs 2684]
1996 04 28.379 9.4 mv *McDonald, P. [vsnet-obs 2704]
1996 04 30.877 9.8: mv SK *Linander, S. 10.2 T (80x) [vsnet-obs 2698]
1996 05 04.100 9.6 mv *Fidrich, R. [vsnet-obs 2736]
1996 05 05.863 9.6 mv *Moeller, M. 15.2 L [vsnet-obs 2739]
1996 05 06.877 9.8 mv *Bouma, R. J. 25.4 L [vsnet-obs 2764]
1996 05 07.897 9.6 mv *Day, J. S. [vsnet-obs 2750]
1996 05 08.028 9.5 mv *Poyner, G. [vsnet-obs 2744]
1996 05 09.705 9.79 V SK *Kiyota, S. ST-6 [vsnet-obs 2763]
1996 05 12.769 9.7 mv *Kato, T. 6 R [vsnet-obs 2770]
1996 05 13.944 9.9 mv *Linander, S. 10.2 T (80x) [vsnet-obs 2781]
1996 05 14.089 9.5 mv *Poyner, G. [vsnet-obs 2775]
1996 05 15.078 9.5 mv *Poyner, G. [vsnet-obs 2780]
1996 05 16.990 9.7 mv SK *Granslo, B. H. 20.3 T (123x) [vsnet-obs 2927]
1996 05 17.98 9.8 mv AN *Vollmann, W. 8.0 B (20x) [vsnet-obs 2808]
1996 05 18.753 9.7 mv *Watanabe, T. 32 L [vsnet-obs 2797]
1996 05 19.0 9.7 mv *Kiss, L. [vsnet-obs 2811]
1996 05 21.076 9.8 mv *Diepvens, A. 15 R [vsnet-obs 2818]
1996 05 24.953 9.5 mv *Poyner, G. [vsnet-obs 2845]
1996 05 25.757 9.7 mv SK *Takahashi, S. [vsnet-obs 2849]
1996 05 26.0868 9.9 mv AN *Brincat, S. M. [vsnet-obs 2851]
1996 05 27.998 9.8 mv *Diepvens, A. 15 R [vsnet-obs 2862]
1996 05 28.955 9.9 mv SK *Granslo, B. H. 20.3 T (123x) [vsnet-obs 2927]
1996 06 01.001 9.6 mv *Poyner, G. 22 L [vsnet-obs 2874]
1996 06 02.983 9.8 mv SK *Granslo, B. H. 20.3 T (123x) [vsnet-obs 2927]
1996 06 03.976 9.8 mv SK *Granslo, B. H. 20.3 T (123x) [vsnet-obs 2927]
1996 06 04.958 9.8 mv *Diepvens, A. 15 R [vsnet-obs 2887]
1996 06 06.965 9.8 mv *Vollmann, W. 8.0 B (20x) [vsnet-obs 2921]
1996 06 07.0 9.9 mv *Kiss, L. [vsnet-obs 2933]
1996 06 08.947 9.8 mv *Poyner, G. 40 L [vsnet-obs 2920]
1996 06 10.076 9.8 mv *Lange, T. 10.2 L [vsnet-obs 2925]
1996 06 11.927 10.0 mv *Lange, T. 10.2 L [vsnet-obs 2931]
1996 06 12.947 10.0 mv *Bouma, R. J. 25.4 L [vsnet-obs 2935]
1996 06 13.981 9.9 mv PE *Granslo, B. H. 20.3 T (123x) (this report)
2960
2970------------------------------------------------------------------------
2990
3000 +++++ Comparison stars +++++
3010
3020 The following is a selected list of nearby stars, brighter than mag.
3030 V = 11.05, where precise magnitudes are known:
3040
3050 R.A. (2000) Decl V Ref Sp Catalogue Ident AAVSO
3060 h m s o ' SAO HD
3070 01 11 06 +55 09.0 4.33 MUBV A7 22070 6961 theta 43
3080 01 08 16 +54 55.2 5.16v MUBV G5 22024 6582 mu 52
3090 01 04 02 +52 30.1 5.99 MUBV K2 21967 6211 .. 60
3100 01 09 52 +54 44.3 6.74 MUBV G8 22044 6833 .. 67
3110 01 04 17 +54 12.3 6.84 SK G0 21974 6250 B 68
3120 01 08 12 +55 09.4 7.60 HIC F2 22029 6656 Y 76
3130 01 01 09 +54 35.3 8.22 HIC A2 21921 5881 Z 82
3140 01 10 23 +53 44.0 8.28 MUBV G5 22054 6890 14 83
3150 01 13 06 +54 24.2 8.53 SK A0 22098 7178 D ..
3160 01 04 17 +54 27.7 8.70 SK KO 21973 232365 16 ..
3170 01 09 16 +52 36.2 9.00 MUBV A2 22038 6772 .. 90
3180 01 06 40 +54 22.2 9.21 CMC A2 22009 232380 17 ..
3190 01 04 53 +54 35.6 9.56 CMC A2 21989 232370 19 ..
3200 01 05 36 +54 07.9 9.58 SK B9 21994 236617 F 96
3210 01 06 10 +54 09.3 9.85 SG .. [BD +53 222] .. ..
3220 01 04 37 +54 01.5 10.35 SK .. [GSC3668-1745] G 104
3230 01 05 28 +53 56.8 11.01 SK .. [BD +53 215] H ..
3240
3250 The V-magnitudes were obtained from Mean UBV Catalogue [ref. MUBV],
3260 measurements by Skiff [SK] (see below), Hipparcos Input Catalogue
3270 [HIC], Carlsberg Meridian Catalogue [CMC], and measurements by
3280 Goranskij and Shugarov [SG] (see below). These values should be
3290 accurate to within 0.01-0.03 magnitudes for all references except
3300 CMC, where the accuracy is around 0.05 mag. Positions and spectral
3310 types were taken from HIC, CMC. PPM Star Catalogue, and Guide Star
3320 Catalogue (GSC). Star numbers are from SAO Star Catalog (SAO), Henry
3330 Draper Catalogue (HD), Bonner Durchmusterung (BD), and GSC. The
3340 comparison star identifications are from The Astronomer Electronic
3350 Circular No. 1021 (letters) and NAS.VSS (numbers). The AAVSO numbers
3360 are magnitudes to the nearest 0.1 mag., without the decimal point.
3370 These magnitudes are used on the revised AAVSO (b) scale chart, that
3380 accompanied AAVSO Alert No. 214.
3390
3400 The (revised) TA sequence from TA E-Circular 1021 is as follows
3410 (PEP-V magnitudes from Skiff and HIC): B = 6.84; Y = 7.6; Z = 8.22;
3420 D = 8.53; E = 9.10; F = 9.58; G = 10.35; H = 11.01.
4990
5000 +++++ Images +++++
5010
5020 Images of Nova Cassiopeiae 1995 are available from the ftp address
5030 of VSNET, and the URL address of "The Astronomer" group:
5040
5050 ftp://ftp.kusastro.kyoto-u.ac.jp/pub/vsnet/Novae/nova_cas95/
5060 http://www.demon.co.uk/astronomer/nova_cas95.html
5990
6000 +++++ Electronic charts +++++
6010
6020 Finder charts are available by the anonymous ftp at VSNET at location
6030 ftp.kusastro.kyoto-u.ac.jp in directory /pub/vsnet/Novae/nova_cas95.
6040 The files are ncas95c1.gif and ncas95c2.gif. The second file contains
6050 the V-magnitude sequence by B. Skiff.
6060
6070 AAVSO (b) and (d) scale charts in file formats GIF, PostScript
6080 TIFF, may be obtained from the AAVSO ftp site at ftp.aavso.org
6090 (198.116.78.2), in /pub/alert218. These charts contains V-magnitudes
6100 (rounded to 0.1 mag.) from Hipparcos Input Catalogue and B. Skiff's
6110 measurements. The chart files are large in order to obtain
6120 satisfactory resolution and clarity. AAVSO can also be contacted on
6130 World Wide Web, at their URL address http://www.aavso.org/index.html.
6490
6500 +++++ Light curves +++++
6510
6520 Based on observations from The Astronomer/BAA database, Guy Hurst,
6530 editor of The Astronomer magazine, has prepared light curves for
6540 this nova. The latest version is available at the following URL
6550 address:
6560 http://www.demon.co.uk/astronomer/images/ncas95_lightcurve.gif
6570
6580 Stig Linander has prepared weighted light curves for Nova Cas 1995.
6590 The following "weighting" algorithm has been used:
6600
6610 The time axis is divided into intervals of 0.1 days. For each
6620 interval:
6630 If there is at least one observation in "this" interval:
6640 Set a dot, calculated from observations in "this" interval and
6650 the neighbouring intervals.
6660 Observations in "this" interval are weighted by a factor of 1,
6670 observations "this +/- 0.1 day" are weighted by a factor of 5/8,
6680 observations "this +/- 0.2 day" are weighted by a factor of 3/8,
6690 observations "this +/- 0.3 day" are weighted by a factor of 2/8,
6700 observations "this +/- 0.4 day" are weighted by a factor of 1/8.
6710
6720 If there are three or more contiguous intervals without observations,
6730 the dots are connected by thin lines (3 * 0.1 day ~ 8 hours),
6740 otherwise by "thick" lines.
6750
6760 This is a somewhat empirical algorithm and was the result of some
6770 experimentation in January 1994 to get a "nice-looking" light curve
6780 for Nova Cas 1993.
6790
6800 These curves can be obtained by anonymous ftp at VSOLJ's site at
6810 ftp.kusastro.kyoto-u.ac.jp in directory /pub/vsnet/Novae/nova_cas95.
6820 Light curves and more information on Nova Cas 1995 and Nova Cas 1993
6830 can also be found at Linander's WWW site
6840 http://www.geocities.com/CapeCanaveral/1295/ncas_e.html
6850
6860 As reported by T. Kato on [vsnet 521] real-time light curves for
6870 this nova and some other variable stars are now available via the
6880 WWW site of VSNET at http://http.kusastro.kyoto-u.ac.jp/vsnet.
6890 These curves are based on observations that have been reported
6900 in the VSNET-recommended format. For further information one
6910 should check the Web pages of VSNET or send an email-request to
6920 vsnet-adm@kusastro.kyoto-u.ac.jp.
9570
9580 - - -
9590
9600 The compilers wish to thank all observers for supplying vital obser-
9610 vations of this nova!
9620
9630 We especially wish to thank Taichi Kato, Kyoto University, Japan for
9640 compiling the early versions of this document.
9650
9660 Compiled by Stig Linander, Farum, Denmark (sl@csd.cri.dk)
9670 and Bjorn H. Granslo, Fjellhamar, Norway.
9680
9880 ----
9890 Norwegian Astronomical Society - Variable Star Section
9900 Bjorn H. Granslo (bgranslo@astro.uio.no)
9910
9940 --------------------------------------------------------------------
9950 Bjorn H. Granslo Telephone: +47 22 85 75 21 / +47 22 85 65 18
9960 Postboks 1029, Blindern Internet: bgranslo@astro.uio.no
9970 N-0315 Oslo, Norway http://www.astro.uio.no/~bgranslo/index.html
9980 ---------------------------------------------------------------------
9990
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