J/MNRAS/387/344 BVRcIC photometry of V2615 Oph (Munari+, 2008)
Optical evolution of Nova Ophiuchi 2007 = V2615 Oph.
Munari U., Henden A., Valentini M., Siviero A., Dallaporta S., Ochner P.,
Tomasoni S.
<Mon. Not. R. Astron. Soc., 387, 344-348 (2008)>
=2008MNRAS.387..344M 2008MNRAS.387..344M
ADC_Keywords: Novae ; Binaries, cataclysmic ; Photometry, UBVRI
Keywords: novae - cataclysmic variables
Abstract:
The moderately fast Nova Oph 2007 reached maximum brightness on
2007 March 28 at V=8.52, B-V=+1.12, V-Rc=+0.76, V-Ic=+1.59 and
Rc-Ic=+0.83 , after fast initial rise and a pre-maximum halt lasting
a week. Decline times were tV2=26.5, tB2=30, tV3=48.5 and
tB3=56.5d. The distance to the nova is d=3.7±0.2kpc , the height
above the Galactic plane is z=215pc, the reddening is E(B-V)=0.90 and
the absolute magnitude at maximum is MmaxV=-7.2 and
MmaxB=-7.0. The spectrum four days before maximum resembled a F6
supergiant, in an agreement with broad-band colours. It later
developed into that of a standard 'FeII'-class nova. Nine days past
maximum, the expansion velocity estiIIted from the width of Hα
emission component was ∼730km/s, and the displacement from it
of the principal and diffuse-enhanced absorption systems was ∼650
and 1380km/s, respectively. Dust probably formed and disappeared
during the period from 82 to 100d past maximum, causing (at peak dust
concentration) an extinction of ΔB=1.8mag and an extra
ΔE(B-V)=0.44 reddening.
Description:
The BVRcIc photometric evolution of NOph07 has been monitored, for
seven months and over a 7mag decline, with three different telescopes:
(a) the Sonoita Research Observatory (SRO) 0.35-m Celestron C14
robotic telescope (b) the 0.30-m Meade RCX-400 f/8 Schmidt-Cassegrain
telescope owned by Associazione Astrofili Valle di Cembra (Trento,
Italy), and (c) the 0.50-m f/8 Ritchey-Cretien telescope operated on
top of Mt. Zugna by Museo Civico di Rovereto (Trento, Italy)
Objects:
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RA (2000) DE Designation(s)
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17 42 44.0 -23 40 35 V2615 Oph = NOVA Oph 2007
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 50 116 Photometric measurements of V2615 Oph
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d HJD Heliocentric Julian date
14- 19 F6.3 mag Vmag Johnson V magnitude
22- 26 F5.3 mag B-V ? Johnson B-V colour index
29- 33 F5.3 mag V-Rc ? Johnson-Cousins V-Rc colour index
36- 40 F5.3 mag Rc-Ic ? Cousins R-I colour index
43- 47 F5.3 mag V-Ic ? Johnson-Cousins V-Ic colour index
50 A1 --- Obs [abc] Observations telescope and site (1)
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Note (1): Observation telescope and site as follows:
a = Sonoita Research Observatory (SRO) 0.35-m Celestron C14 telescope
b = 0.30-m Meade RCX-400 f/8 Schmidt-Cassegrain telescope,
Associazione Astrofili Valle di Cembra (Trento, Italy)
c = 0.50-m f/8 Ritchey-Cretien telescope,
Mt. Zugna by Museo Civico di Rovereto (Trento, Italy)
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 29-Jun-2009