J/A+A/701/A47 ASASSN-13dn Vgriz light curves (Hueichapan+, 2025)
ASASSN-13dn: A luminous and double-peaked type II supernova.
Hueichapan E., Prieto J.L., Cartier R., Contreras C., Bersten M., Moriya T.,
Kochanek C., Shappee B.J.
<Astron. Astrophys. 701, A47 (2025)>
=2025A&A...701A..47H 2025A&A...701A..47H (SIMBAD/NED BibCode)
ADC_Keywords: Supernovae ; Photometry, SDSS ; Optical
Keywords: supernova: general - supernova: individual: ASASSN-13dn
Abstract:
We present observations of ASASSN-13dn, one of the first supernovae
discovered by ASAS-SN, and a new member of the rare group of Luminous
Type II Supernovae (LSNe II). It was discovered near maximum light,
reaching an absolute magnitude of Mv~-19mag, placing this object
between normal luminosity type II SNe and superluminous SNe.
A detailed analysis of the photometric and spectroscopic data of
ASASSN-13dn is performed. The spectra are characterized by broad
lines, in particular the Hα lines where we measure expansion
velocities ranging between 14000-6000km/s over the first 100 days.
Hα dominates the nebular spectra, and we detect a narrow P-Cygni
absorption within the broader emission line with an expansion velocity
of 1100km/s. Photometrically, its light curve shows a re-brightening
of ∼0.6mag in the gri bands starting at 25±2 days after discovery,
with a secondary peak at ∼73d, followed by an abrupt and nearly linear
decay of 0.09mag/d for the next 35 days. At later times, after a drop
of 4 magnitudes from the second maximum, the light curves of
ASASSN-13dn shows softer undulations from 125 to 175 days.
We compare ASASSN-13dn with other LSNe II in the literature, finding
no match to both light curve and spectroscopic properties. We discuss
the main powering mechanism and suggest that interaction between the
ejecta and a dense CSM produced by eruptions from an LBV-like
progenitor could potentially explain the observations.
Description:
Photometric data for the luminous and double-peaked Type II supernova
ASASSN-13dn. The observations were obtained in the optical Johnson V
band and the SDSS g, r, i, z bands between 2013 and 2014. The
magnitudes are reported in the natural system of each instrument. A
value of 0.000 indicates that no measurement was obtained for that
band on that epoch.
Objects:
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RA (2000) DE Designation(s)
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12 52 58.19 +32 25 09.2 ASASSN-13dn = ASASSN -13dn
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 24 10 ASASSN-13dn V-band photometry
tablea2.dat 67 61 ASASSN-13dn g,r,i,z-band photometry
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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- 13 F13.5 d JD Julian Date of observation
15- 19 F5.2 mag Vmag Johnson V-band magnitude
21- 24 F4.2 mag e_Vmag Uncertainty in Vmag
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Byte-by-byte Description of file: tablea2.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d JD Julian Date of observation
14- 19 F6.3 mag gmag ?=0 g-band magnitude (1)
21- 25 F5.3 mag e_gmag ?=0 Uncertainty in gmag (1)
28- 33 F6.3 mag rmag ?=0 r-band magnitude (1)
35- 39 F5.3 mag e_rmag ?=0 Uncertainty in rmag (1)
42- 47 F6.3 mag imag ?=0 i-band magnitude (1)
49- 53 F5.3 mag e_imag ?=0 Uncertainty in imag (1)
56- 61 F6.3 mag zmag ?=0 z-band magnitude (1)
63- 67 F5.3 mag e_zmag ?=0 Uncertainty in zmag (1)
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Note (1): Values of 0.000 in magnitude or error columns indicate missing data.
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Acknowledgements:
From Emilio Hueichapan, emilio.hueichapan(at)mail.udp.cl
We thank the CDS team for distributing this catalogue. This research
made use of the ASAS-SN survey data and follow-up observations.
(End) Patricia Vannier [CDS] 03-Sep-2025