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Norwegian Astronomical Society - Variable Star Section
***** Sequence for V475 Scuti (Nova 2003) *****
Compiled by Bjorn H. Granslo (version 2003 October 29)
Original version 2003 Sep. 3 [vsnet-sequence 242], revised and
extended on 2003 Oct. 29.
1844-09 V475 Sct [R.A. = 18h49m37s.60, Decl. = -09o33'50".8 (2000)]
This object was discovered by H. Nishimura (Kakegawa, Shizuoka-ken,
Japan) on T-Max films from 2003 Aug. 28.58 and 29.44 UT with a 200-mm
f/4.0 lens [IAUC 8190]. Optical spectroscopy does not show the bright
emission profiles from hydrogen that are typical for classical novae
[IAUC 8191], the spectrum resembles that of V838 Mon. Data so far
indicate a visual magnitude from 8.5 (Sep 1, 2003) to fainter than 16.
*** 1. Sequence Stars ***
This list contains identifications, positions and photometry for stars
with B-V from 0.0 to 0.9. Rc photometry is given for the fainter stars.
Id R.A. (2000.0) Decl. Star Name V-mag sV B-V sB-V Source
h m s o ' "
A 18 50 58.5 -09 46 27 HR 7094 5.83 0.01 0.61 0.01 GCPD
B 18 53 01.8 -09 34 32 HR 7110 6.33 0.01 0.21 0.01 GCPD
C 18 53 55.9 -09 22 13 HD 175058 7.03 0.01 0.40 0.02 GCPD
D 18 39 56.5 -11 06 26 HD 172317 7.33 0.01 0.66 0.02 GCPD
E 18 52 06.6 -09 04 58 HD 174704 7.74 0.01 0.49 0.02 GCPD
F 18 55 40.8 -09 16 35 HD 175431 8.20 0.01 0.41 0.03 GCPD*
G 18 49 12.1 -09 57 06 HD 174084 8.68 0.03 0.19 0.03 ASAS-3*
H 18 51 18.7 -09 02 30 HD 174554 9.04 0.02 0.27 0.04 GCPD*
K 18 49 24.9 -09 41 35 HD 174131 9.61 0.03 0.67 0.06 ASAS-3*
L 18 49 44.8 -09 22 23 SD -09 4848 9.85 0.04 0.23 0.05 ASAS-3*
M 18 51 44.2 -10 08 55 SD -10 4837 10.30 0.03 0.05 0.08 ASAS-3*
N 18 49 12.3 -09 23 41 SD -09 4842 10.76 0.03 0.0 0.2 ASAS-3*
P 18 49 03.0 -09 40 29 TYC 5697-0447 11.42 0.05 0.5 0.3 ASAS-3*
Q 18 49 45.0 -09 34 07 TYC 5697-2677 11.79 0.03 0.27 0.03 Henden
R 18 49 29.8 -09 31 42 GSC 5697-0507 12.08 0.01 0.42 0.01 Henden
S 18 49 55.0 -09 32 52 GSC 5697-4200 12.44 0.01 0.90 0.01 Henden
T 18 49 55.1 -09 36 36 GSC 5697-0186 12.93 0.01 0.60 0.01 Henden
U 18 49 28.6 -09 34 29 GSC 5697-0498 13.15 0.01 0.89 0.01 Henden
W 18 49 50.8 -09 31 45 0750-14859318 13.63 0.01 0.63 0.01 Henden
X 18 49 15.4 -09 36 02 0803-0485359 14.08 0.01 0.68 0.02 Henden
Y 18 49 30.0 -09 37 42 0750-14817976 14.39 0.01 0.56 0.01 Henden
Z 18 49 37.3 -09 30 58 0750-14832995 14.75 0.02 0.94 0.03 Henden
Notes:
Stars A-E: V-magnitudes and B-V colours are derived from data obtained
at GCPD, The Lausanne Photometric Database.
Stars F-P: B-V are derived from Tycho-2 BT and VT photometry
(Hog et al. 2000) by using the procedure of Bessell (2000).
Stars F, H: V-magnitudes are derived from GCPD.
Stars G, K-P: V-magnitudes are obtained from ASAS-3.
Stars Q-Z: V and B-V are from CCD measurements by Arne Henden, USNO.
Star C: ASAS-3 has V=7.07 (+/-0.04).
Star D: ASAS-3 has V=7.35 (+/-0.03). Tycho-2 (w/Bessell) has V=7.31
(+/-0.02) and B-V=0.67 (+/-0.03).
Star E: ASAS-3 has V=7.77 (+/-0.04). Tycho-2 has V=7.74 (+/-0.02)
and B-V=0.52 (+/-0.02).
Star F: ASAS-3 has V=8.23 (+/-0.04). Tycho-2 has V=8.21 (+/-0.02).
Star G: Double star Aitken 1888, mag. 8.5 and 11.5, sep. 2".2 [WDS];
combined V-mag. given in sequence. Tycho-2 w/Bessell has V=8.77
(+/-0.02) and B-V=0.19 (+/-0.03) for the brightest component.
Star H: ASAS-3 has V=9.07 (+/-0.03). Tycho-2 has V=9.05 (+/-0.03).
Star K: Tycho-2 has V=9.58 (+/-0.05).
Star L: TYC 5693-6030. Tycho-2 has V=9.77 (+/-0.05).
Star M: TYC 5697-2771. Tycho-2 has V=10.34 (+/-0.08).
Star N: TYC 5697-0096.
Star Q: Henden has Rc=11.61 (+/-0.04). ASAS-3 has V=11.76 (+/-0.05).
Star R: Henden has Rc=11.80 (+/-0.02). ASAS-3 has V=11.99 (+/-0.04).
This star has a companion at distance 8" (towards SSW), for which
Henden has V=14.4 and B-V=0.6.
Star S: Henden has Rc=11.90 (+/-0.01). ASAS-3 has V=12.37 (+/-0.08).
This star has two quite red companions at distances 9" and 13"
(towards W); Henden has V=15.2 and V=15.7, respectively.
Star T: Henden has Rc=12.56 (+/-0.02).
Star U: Henden has Rc=12.60 (+/-0.01).
Star W: Identification is from USNO-A2.0. Henden has Rc=13.23 (+/-0.01).
Star X: Identification is from USNO-B1.0. Henden has Rc=13.65 (+/-0.02).
Star Y: Identification is from USNO-A2.0. Henden has Rc=14.09 (+/-0.01).
Star Z: Identification is from USNO-A2.0. Henden has Rc=14.16 (+/-0.04).
*** 2. Other Reference Stars ***
These stars (with B-V between 0.4 and 2.0) may be used as colour
calibrators or alternative comparison stars.
Id R.A. (2000.0) Decl. Star Name V-mag sV B-V sB-V Source
h m s o ' "
1 18 49 39.4 -09 37 32 SD -09 4846 10.69 0.02 0.45 0.02 Henden
2 18 49 22.6 -09 30 59 TYC 5697-0942 10.86 0.01 1.86 0.01 Henden
3 18 49 26.5 -09 30 04 GSC 5697-1314 12.30 0.01 1.98 0.01 Henden
4 18 49 52.3 -09 35 49 GSC 5697-2739 12.88 0.01 1.77 0.01 Henden
5 18 49 54.6 -09 32 11 0750-14866896 13.44 0.01 0.55 0.02 Henden
6 18 49 27.9 -09 30 19 0750-14813774 13.93 0.02 1.18 0.01 Henden
7 18 49 48.4 -09 35 53 0750-14854711 13.99 0.01 1.28 0.01 Henden
Stars 1-7: V and B-V are from CCD measurements by A. Henden, USNO.
Star 1: TYC 5697-1786. Henden has Rc=10.46 (+/-0.03).
Star 2: Henden has Rc=9.78 (+/-0.01).
Star 3: Henden has Rc=11.01 (+/-0.01).
Star 4: Henden has Rc=11.86 (+/-0.02).
Star 5: Identification is from USNO-A2.0. Henden has Rc=13.10 (+/-0.02).
Star 6: Identification is from USNO-A2.0. Henden has Rc=13.11 (+/-0.03).
Star 7: Identification is from USNO-A2.0. Henden has Rc=13.26 (+/-0.01).
Acknowledgements:
The VizieR Service at Centre de Donnees astronomiques de Strasbourg,
The Lausanne General Catalogue of Photometric Data (GCPD), The All
Sky Automated Survey (ASAS) web sites have been used in preparing
this sequence. I would also like to thank B. Andresen for helpful
advice and A. Henden for providing quality photometry.
References:
Bessell M.: 2000, "The Hipparcos and Tycho Photometric System
Passbands", Publ. Ast. Soc. Pacific, 112, 961.
Henden, A: 2003, CCD photometry file for the field of V475 Sct.
ftp://ftp.nofs.navy.mil/pub/outgoing/aah/sequence/v475sct.dat
Hog E. et al.: 2000, "The Tycho-2 Catalogue of the 2.5 Million
Brightest Stars", Astron. Astrophys. 355, L27. [Tycho-2]
Mermilliod J.-C., Hauck B., Mermilliod M.: "The General Catalogue
of Photometric Data", University of Lausanne, Switzerland.
URL: http://obswww.unige.ch/gcpd/gcpd.html . [GCPD]
Pojmansky G.: "The All Sky Automated Survey". V magnitudes
derived from measurements with the ASAS-3 system [ASAS-3].
URL: http://www.astrouw.edu.pl/~gp/asas/asas.html .
Worley C. E., and Douglass, G. G.: 1997, "The Washington Visual
Double Star Catalog, 1996.0", US Naval Observatory. [WDS]
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