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J/ApJ/833/149    Opt/NIR obs. of M31N 2008-12a 2015 eruption    (Darnley+, 2016)

M31N 2008-12a - the remarkable recurrent nova in M31: panchromatic observations of the 2015 eruption. Darnley M.J., Henze M., Bode M.F., Hachisu I., Hernanz M., Hornoch K., Hounsell R., Kato M., Ness J.-U., Osborne J.P., Page K.L., Ribeiro V.A.R.M., Rodriguez-gil P., Shafter A.W., Shara M.M., Steele I.A., Williams S.C., Arai A., Arcavi I., Barsukova E.A., Boumis P., Chen T., Fabrika S., Figueira J., Gao X., Gehrels N., Godon P., Goranskij V.P., Harman D.J., Hartmann D.H., Hosseinzadeh G., Horst J.C., Itagaki K., Jose J., Kabashima F., Kaur A., Kawai N., Kennea J.A., Kiyota S., Kucakova H., Lau K.M., Maehara H., Naito H., Nakajima K., Nishiyama K., O'Brien T.J., Quimby R., Sala G., Sano Y., Sion E.M., Valeev A.F., Watanabe F., Watanabe M., Williams B.F., Xu Z. <Astrophys. J., 833, 149-149 (2016)> =2016ApJ...833..149D (SIMBAD/NED BibCode)
ADC_Keywords: Novae ; Photometry, UBVRI ; Photometry, ultraviolet ; X-ray sources Keywords: galaxies: individual: M31; novae, cataclysmic variables; stars: individual: M31N 2008-12a; ultraviolet: stars; X-rays: binaries Abstract: The Andromeda Galaxy recurrent nova M31N 2008-12a had been observed in eruption 10 times, including yearly eruptions from 2008 to 2014. With a measured recurrence period of Prec=351±13days (we believe the true value to be half of this) and a white dwarf very close to the Chandrasekhar limit, M31N 2008-12a has become the leading pre-explosion supernova type Ia progenitor candidate. Following multi-wavelength follow-up observations of the 2013 and 2014 eruptions, we initiated a campaign to ensure early detection of the predicted 2015 eruption, which triggered ambitious ground- and space-based follow-up programs. In this paper we present the 2015 detection, visible to near-infrared photometry and visible spectroscopy, and ultraviolet and X-ray observations from the Swift observatory. The LCOGT 2m (Hawaii) discovered the 2015 eruption, estimated to have commenced at August 28.28±0.12UT. The 2013-2015 eruptions are remarkably similar at all wavelengths. New early spectroscopic observations reveal short-lived emission from material with velocities ∼13000km/s, possibly collimated outflows. Photometric and spectroscopic observations of the eruption provide strong evidence supporting a red giant donor. An apparently stochastic variability during the early supersoft X-ray phase was comparable in amplitude and duration to past eruptions, but the 2013 and 2015 eruptions show evidence of a brief flux dip during this phase. The multi-eruption Swift/XRT spectra show tentative evidence of high-ionization emission lines above a high-temperature continuum. Following Henze+ (2015A&A...582L...8H), the updated recurrence period based on all known eruptions is Prec=174±10days, and we expect the next eruption of M31N 2008-12a to occur around 2016 mid-September. Description: Following the 2015 eruption of M31N 2008-12a detection, a pre-planned panchromatic follow-up campaign was initiated which involved ten visible/NIR ground-based telescopes around the globe, but was spearheaded by Swift, the fully robotic 2m Liverpool Telescope (LT) and the Las Cumbres Observatory Global Telescope Network (LCOGT) 2m telescope on Haleakala, Hawaii. The ground-based facilities include the aforementioned LT and LCOGT, the Mount Laguna Observatory (MLO) 1.0m, the Ondrejov Observatory 0.65m, the Bolshoi Teleskop Alt-azimutalnyi (BTA) 6.0m, the Corona Borealis Observatory (CBO) 0.3m, the Nayoro Observatory of Hokkaido University 1.6m Pirka telescope, the Okayama Astrophysical Observatory (OAO) 0.5m MITSuME telescope, and the iTelescope.net T24. Objects: ---------------------------------------------------------- RA (ICRS) DE Designation(s) ---------------------------------------------------------- 00 45 28.80 +41 54 10.1 M31N 2008-12a = M31N 2014-10c ---------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table11.dat 112 265 Visible and near infrared photometric observations of the 2015 eruption of M31N 2008-12a table12.dat 92 147 Color evolution of the 2015 eruption of M31N 2008-12a table13.dat 107 82 Swift observations of nova M31N 2008-12a following the 2015 eruption dbf10.fits 2880 12 Figure 10 data: Liverpool Telescope SPRAT spectrum of the 2015 eruption of M31N 2008-12a
See also: B/vsx : AAVSO International Variable Star Index VSX (Watson+, 2006-2014) J/AJ/152/62 : Revised LGGS UBVRI photom. of M31 & M33 stars (Massey+, 2016) J/ApJ/811/32 : BVRcIcJHK and X-ray LCs of the U Sco nova (Pagnotta+, 2015) J/A+A/580/A45 : Nova M31N 2008-12a 2014 eruption in opt/UV (Darnley+, 2015) J/A+A/563/A2 : X-ray monitoring of M31 novae (Henze+, 2014) J/ApJS/197/31 : Swift X-ray obs. of classical novae. II. (Schwarz+, 2011) J/A+A/533/A52 : X-ray monitoring of M31 novae (Henze+, 2011) J/ApJ/734/12 : Survey of novae in M31 (Shafter+, 2011) J/AJ/140/34 : Classification of novae light curves (Strope+, 2010) J/ApJS/187/275 : Photometric histories of recurrent novae (Schaefer, 2010) J/A+A/477/67 : Search for M31 novae from Schmidt plates (Henze+, 2008) J/A+A/465/375 : X-ray monitoring of optical novae in M31 (Pietsch+, 2007) J/A+A/418/869 : M31-RV evolution (1942-1993) (Boschi+, 2004) http://www.mpe.mpg.de/~m31novae/opt/m31 : Optical novae in M31 Byte-by-byte Description of file: table11.dat
Bytes Format Units Label Explanations
1- 15 A15 "Y/M/D" Obs UT Date of observation midpoint 18- 24 F7.3 d Time Time after optical peak of observation midpoint 28- 34 F7.3 d Start Julian Date of observation start +2457000.5 38- 44 F7.3 d End Julian Date of observation end +2457000.5 49- 62 A14 --- Tel Telescope+Instrumentation used; where known 66- 67 I2 --- Nexp [0/75] Number of single exposures making up observation (0=unknown) 70- 73 I4 s Exp [0/600] Exposure time of each of single exposures (0=unknown) 79- 80 A2 --- Filt Filter used (BVRIHu'r'i'z') 84- 88 F5.1 --- SNR [0/176] Signal to noise ratio of detection (0=unknown or undetected (if no e_mag)) 93 A1 --- l_mag Upper limit flag on mag 94- 99 F6.3 mag mag [12.5/23.7] Apparent magnitude in Filt (or upper limit) 102-107 F6.3 mag e_mag [0.008/0.5]? Uncertainty in mag 110-112 A3 --- Ref Reference associated with data point (1)
Note (1): Reference as follows: a = Darnley et al. (2015ATel.7965....1D) b = Shafter et al. (2015ATel.7967....1S) c = Hornoch et al. (2015ATel.7969....1H) d = Darnley et al. (2015ATel.7980....1D) e = Henze et al. (2015ATel.7984....1H) f = Darnley et al. (2015ATel.8029....1D) g = Arai et al. (2015ATel.7979....1A) h = Chen et al. (2015ATel.7974....1C) i = Hornoch et al. (2015ATel.7976....1H) j = Shafter (2015ATel.7968....1S) k = Darnley et al. (2015ATel.7964....1D) l = Fabrika et al. (2015ATel.8033....1F) m = Hornoch & Fabrika (2015ATel.8038....1H).
Byte-by-byte Description of file: table12.dat
Bytes Format Units Label Explanations
1- 15 A15 "Y/M/D" Obs UT Date of observation midpoint 18- 24 F7.3 d Time Time after optical peak of observation midpoint 28- 34 F7.3 d Start Julian Date of observation start +2457000.5 38- 44 F7.3 d End Julian Date of observation end +2457000.5 49- 67 A19 --- Tel Telescope+Instrumentation used; where known 71- 77 A7 --- Filt Filter pair used to determine color (B-V, V-r', i'-z', r'-i', u'-B and uvw1-u') 79- 84 F6.3 mag Color [-1.8/0.7] Apparent color in Filt 88- 92 F5.3 mag e_Color [0.01/0.4] Uncertainty in Color
Byte-by-byte Description of file: table13.dat
Bytes Format Units Label Explanations
1- 13 A13 --- ObsID Identification of Swift observation 16- 19 F4.2 ks Exp Dead-corrected Swift/XRT exposure time 22- 36 A15 "Y/M/D" Date UT Date of observation midpoint 39- 46 F8.2 d Start Julian Date of observation start +2457000.5 50- 54 F5.2 d Time Time after optical peak of observation start 58 A1 --- l_m2mag Upper limit flag on m2mag 59- 62 F4.1 mag m2mag [16.8/19]? Swift/UVOT uvm2 band apparent magnitude 66- 68 F3.1 mag e_m2mag [0.2]? Uncertainty in m2mag 71 A1 --- l_w1mag Upper limit flag on w1mag 72- 75 F4.1 mag w1mag [17/20.5]? Swift/UVOT uvw1 band apparent magnitude 79- 81 F3.1 mag e_w1mag [0.1/0.4]? Uncertainty in w1mag 84 A1 --- l_CRate Upper limit flag on CRate 85- 88 F4.1 10-2ct/s CRate [0.7/31] Swift/XRT count rate 92- 94 F3.1 10-2ct/s e_CRate [0.3/0.9]? Uncertainty in CRate 97 A1 --- l_LX Upper limit flag on LX 98-101 F4.1 10+31W LX [0.5/23] X-ray luminosity; 1e38 erg/s 105-107 F3.1 10+31W e_LX [0.2/0.7]? Uncertainty in LX
History: From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 21-Apr-2017
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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