J/AJ/107/1022 J/AJ/107/1022 UBVRI Photometry of SN 1993J in M81 M W Richmond R R Treffers A V Filippenko Y Paik B Leibundgut E Schulman C V Cox Astron. J. 107 1022 1994 1994AJ....107.1022R Photometry, UBVRI Supernovae Photometry of SN 1993J in M81 (NGC 3031) is presented in the Johnson-Cousins UBVRI system, starting within three days of the probable time of explosion and ending 120 days later. The reddening along the line of sight to this supernova is uncertain -- there is evidence for small [E(B-V) ~ 0.08 mag] and moderate [E(B-V) ~ 0.32 mag] values. For each observed flux, the values are corrected for extinction. The colors are fitted to a Planck function, to determine the temperature and total luminosity of the supernova for each value of reddening.

UT UT date --- JD Julian Date - 2440000 d U U band magnitude The 76 cm telescope's U-band values do not transform well onto the standard color system, but may at least give a qualitative idea of the behavior of SN 1993J at near-UV wavelengths. mag u_U Uncertainty flag for U ":" denotes an uncertain value, and "+" one which has been derived using color terms from the previous or following night. --- B B band magnitude mag u_B Uncertainty flag for B ":" denotes an uncertain value, and "+" one which has been derived using color terms from the previous or following night. --- V V band magnitude mag u_V Uncertainty flag for V ":" denotes an uncertain value, and "+" one which has been derived using color terms from the previous or following night. --- R R band magnitude mag u_R Uncertainty flag for R ":" denotes an uncertain value, and "+" one which has been derived using color terms from the previous or following night. --- I I band magnitude mag u_I Uncertainty flag for I ":" denotes an uncertain value, and "+" one which has been derived using color terms from the previous or following night. --- Notes C = cloudy, P = poor seeing --- UT UT date --- JD Julian Date - 2440000 d U U band magnitude mag u_U Uncertainty flag for U ":" denotes an uncertain value, and "+" one which has been derived using color terms from the previous or following night. --- B B band magnitude mag u_B Uncertainty flag for B ":" denotes an uncertain value, and "+" one which has been derived using color terms from the previous or following night. --- V V band magnitude mag u_V Uncertainty flag for V ":" denotes an uncertain value, and "+" one which has been derived using color terms from the previous or following night. --- R R band magnitude mag u_R Uncertainty flag for R ":" denotes an uncertain value, and "+" one which has been derived using color terms from the previous or following night. --- I I band magnitude mag u_I Uncertainty flag for I ":" denotes an uncertain value, and "+" one which has been derived using color terms from the previous or following night. --- Notes C = cloudy, P = poor seeing --- UT UT date --- JD Julian Date - 2440000 d U U band magnitude mag B B band magnitude mag V V band magnitude mag R R band magnitude mag I I band magnitude mag Notes See notes All data are from the 1-m Jacobus Kapteyn Telescope unless marked I. I = Isaac Newton Telescope; P = poor conditions --- JD Julian Date - 2440000 d Flux Fluxes from measured light curves mW/m2 LowExt Fluxes for extinction [E(B-V)=0.08 mag] mW/m2 ModExt Fluxes for extinction [E(B-V)=0.32 mag] mW/m2 Site Observing site LP = La Palma; KP = Kitt Peak; L = Leuschner --- Bands Bands summed to determine fluxes --- JD Julian Date - 2440000 d LowTemp Temp from low ext. [E(B-V)=0.08 mag] K mw/m2 LowLum Bolometric luminosity from LowTemp 10+42 ModTemp Temp from mod. ext. [E(B-V)=0.32 mag] K mW/m2 ModLum Bolometric luminosity from ModTemp 10+42 Site Observing site LP = La Palma; KP = Kitt Peak; L = Leuschner --- Bands Bands used to determine luminosities --- Nancy G. Roman NSSDC/ADC 1994Oct25AAS CD-ROM Vol II J_AJ_107_1022.xml