J/A+A/625/L8 SN 2017jfs optical and NIR light curves (Pastorello+, 2019)
The evolution of luminous red nova AT 2017jfs in NGC 4470.
Pastorello A., Chen T.-W., Cai Y.-Z., Morales-Garoffolo A., Cano Z.,
Mason E., Barsukova E.A., Benetti S., Berton M., Bose S., Bufano F.,
Callis E., Cannizzaro G., Cartier R., Chen P., Dong S., Dyrbye S.,
Elias-Rosa N., Floers A., Fraser M., Geier S., Goranskij V.P., Kann D.A.,
Kuncarayakti H., Onori F., Reguitti A., Reynolds T., Losada I.R.,
Sagues Carracedo A., Schweyer T., Smartt S.J., Tatarnikov A.M.,
Valeev A.F., Vogl C., Wevers T., de Ugarte Postigo A., Izzo L.,
Inserra C., Kankare E., Maguire K., Smith K.W., Stalder B., Tartaglia L.,
Thoene C.C., Valerin G., Young D.R.
<Astron. Astrophys. 625, L8 (2019)>
=2019A&A...625L...8P 2019A&A...625L...8P (SIMBAD/NED BibCode)
ADC_Keywords: Novae ; Stars, double and multiple ; Photometry, CCD
Keywords: binaries: close - stars: massive -
supernovae: individual: AT 2017jfs -
supernovae: individual: NGC4490-2011OT1 - stars: winds, outflows
Abstract:
We present the results of our photometric and spectroscopic follow-up
of the intermediate-luminosity optical transient AT 2017jfs. At peak,
the object reaches an absolute magnitude of Mg=-15.46±0.15mag and a
bolometric luminosity of 5.5x1041erg/s. Its light curve has the
double-peak shape typical of luminous red novae (LRNe), with a narrow
first peak bright in the blue bands, while the second peak is
longer-lasting and more luminous in the red and near-infrared (NIR)
bands. During the first peak, the spectrum shows a blue continuum with
narrow emission lines of H and FeII. During the second peak, the
spectrum becomes cooler, resembling that of a K-type star, and the
emission lines are replaced by a forest of narrow lines in absorption.
About 5 months later, while the optical light curves are characterized
by a fast linear decline, the NIR ones show a moderate rebrightening,
observed until the transient disappears in solar conjunction. At these
late epochs, the spectrum becomes reminiscent of that of M-type stars,
with prominent molecular absorption bands. The late-time properties
suggest the formation of some dust in the expanding common envelope or
an IR echo from foreground pre-existing dust. We propose that the
object is a common-envelope transient, possibly the outcome of a
merging event in a massive binary, similar to NGC4490-2011OT1.
Description:
Optical and NIR photometry of AT 2017jfs: Johnson-Bessell B,V (Vega
system), Sloan u,g,r,i,z (AB system) and J,H,K (Vega system).
Objects:
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RA (2000) DE Designation(s)
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12 29 37.78 +07 49 35.1 AT 2017jfs = SN 2017jfs
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 172 198 Broadband photometry of AT 2017jfs
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Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 8 I8 --- Date Date of the observation (yyyymmdd)
11- 18 F8.2 --- MJD Modified Julian Date
21 A1 --- l_Bmag Detection limit symbol on Bmag
22- 27 F6.3 mag Bmag ?=- Johnson-Bessell B-band magnitude (Vega)
29- 33 F5.3 mag e_Bmag ? B-band magnitude error
36 A1 --- l_Vmag Detection limit symbol on Vmag
37- 42 F6.3 mag Vmag ?=- Johnson-Bessell V-band magnitude (Vega)
44- 48 F5.3 mag e_Vmag ? V-band magnitude error
51 A1 --- l_umag Detection limit symbol on umag
52- 57 F6.3 mag umag ?=- Sloan u-band magnitude (AB)
59- 63 F5.3 mag e_umag ? u-band magnitude error
66 A1 --- l_gmag Detection limit symbol on gmag
67- 72 F6.3 mag gmag ?=- Sloan g-band magnitude (AB)
74- 78 F5.3 mag e_gmag ? g-band magnitude error
81 A1 --- l_rmag Detection limit symbol on rmag
82- 87 F6.3 mag rmag ?=- Sloan r-band magnitude (AB)
89- 93 F5.3 mag e_rmag ? r-band magnitude error
96 A1 --- l_imag Detection limit symbol on imag
97-102 F6.3 mag imag ?=- Sloan i-band magnitude (AB)
104-108 F5.3 mag e_imag ? i-band magnitude error
111 A1 --- l_zmag Detection limit symbol on zmag
112-117 F6.3 mag zmag ?=- Sloan z-band magnitude (AB)
119-123 F5.3 mag e_zmag ? z-band magnitude error
126 A1 --- l_Jmag Detection limit symbol on Jmag
127-132 F6.3 mag Jmag ?=- J-band magnitude (Vega)
134-138 F5.3 mag e_Jmag ? J-band magnitude error
141 A1 --- l_Hmag Detection limit symbol on Hmag
142-147 F6.3 mag Hmag ?=- H-band magnitude (Vega)
149-153 F5.3 mag e_Hmag ? H-band magnitude error
156 A1 --- l_Kmag Detection limit symbol on Kmag
157-162 F6.3 mag Kmag ?=- K-band magnitude (Vega)
164-168 F5.3 mag e_Kmag ? K-band magnitude error
171-172 I2 -- Instr Instrumental configuration code (1)
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Note (1): Instrumental configuration code as follows:
1 = Gaia spacecraft public data
(http://gsaweb.ast.cam.ac.uk/alerts/alertsindex)
2 = 0.5m ATLAS Telescope + ACAM2 (Mauna Loa, Hawaii Islands, USA)
3 = ASAS-SN 4x0.16 m Brutus Telescope + FLI ProLine PL230 CCD
(LCOGT - Haleakala, Hawaii Islands, USA)
4 = ASAS-SN 4x0.16 m Leawitt Telescope + FLI ProLine PL230 CCD
(LCOGT - McDonard Observatory, Texas, USA)
5 = ASAS-SN 4x0.16 m Paczynski Telescope + FLI ProLine PL230 CCD
(LCOGT - Cerro Tololo Inter-American Observatory, Chile)
6 = 1.8 m Pan-STARRS Telescope + GPC1 camera (Haleakala, Hawaii Islands, USA)
7 = 1.0 m LCO Telescope (Dome 4) + Sinistro CCD
(LCOGT - Cerro Tololo Inter-American Observatory, Chile)
8 = 0.5 m ATLAS Telescope + ACAM1 (Haleakala, Hawaii Islands, USA)
9 = 3.58 m New Technology Telescope (NTT) + EFOSC2 (ESO-La Silla, Chile)
10 = 2.56 m Nordic Optical telescope (NOT) + ALFOSC
(La Palma, Canary Islands, Spain)
11 = 2.0 m Liverpool Telescope (LT) + IO:O (La Palma, Canary Islands, Spain)
12 = 3.58 m New Technology Telescope (NTT) + SOFI (ESO-La Silla, Chile)
13 = 1 m ZEISS-1000 Telescope + 2048x2048 EEV CCD 4240 (Special Astrophysical
Observatory, Mt. Pastukhov, Karachay-Cherkessian Republic, Russia)
14 = 2.56 m Nordic Optical telescope (NOT) + NOTCam
(La Palma, Canary Islands, Spain)
15 = 10.4 m Gran Telescopio Canarias (GTC) + OSIRIS
(La Palma, Canary Islands, Spain)
16 = 2.2m MPG Telescope + GROND (ESO-La Silla, Chile)
17 = 1.0 m LCO Telescope (Dome 8) + Sinistro CCD
(LCOGT-Siding Spring Observatory, Australia)
18 = 2.56 m Nordic Optical telescope (NOT) + STANCam
(La Palma, Canary Islands, Spain)
19 = 2.5 m Telescope + ASTRONIRCAM (Caucasian Mountain Observatory of
Sternberg Astronomical Institute, Mt. Shatdzhatmaz,
Karachay-Cherkessian Republic, Russia)
20 = 6.05 m Bolshoi Teleskop Alt-azimutalnyi (BTA) + SCORPIO
(Special Astrophysical Observatory, Mt. Pastukhova,
Karachay-Cherkessian Republic, Russia)
Information on the All-Sky Automated Survey for Supernovae (ASAS-SN) from
Shappee et al. (2014ApJ...788...48S 2014ApJ...788...48S, Cat. J/ApJ/788/48);
Public Gaia G-band data converted to Johnson-Bessell V and Sloan g following
Jordi et al. (2010A&A...523A..48J 2010A&A...523A..48J, Cat. J/A+A/523/A48);
PanSTARRS w band scaled to Sloan r;
ATLAS 'cyan' and 'orange' bands, converted to Sloan g and r, respectively
(Tonry et al., 2018PASP..130f4505T 2018PASP..130f4505T);
Johnson-Cousins R- and I-band observations from ZEISS-1000 and BTA were
converted to Sloan r and i, respectively, following the transformation
relations of Jordi et al (2006A&A...460..339J 2006A&A...460..339J);
NTT+EFOSC2 Johnson-Bessell U data were converted to Sloan u magnitudes.
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Acknowledgements:
Andrea Pastorello, andrea.pastorello(at)inaf.it
(End) Andrea Pastorello [INAF], Patricia Vannier [CDS] 06-May-2019