Cdrom/AJ/V107/P1022 sn 1993J (Richmond+ 1994) ubvri photometry of sn 1993J in M81: The First 120 Days Michael W. Richmond, Richard R




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CDROM/AJ/V107/P1022 SN 1993J (Richmond+ 1994) ================================================================================ UBVRI Photometry of SN 1993J in M81: The First 120 Days Michael W. Richmond, Richard R. Treffers, Alexei V. Filippenko, Young Paik, Bruno Leibundgut, Eric Schulman and Caroline V. Cox <1994, AJ, 107, 1022> =1994AJ....107.1022R ================================================================================ Abstract: We present photometry of SN 1993J in M81 (NGC 3031) 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 value, we correct the observed fluxes for extinction and calculate the evolution of the sum of all optical flux, which contains roughly half of the supernova's total flux during the period of observation. We also fit the colors to a Planck function, and determine the temperature and total luminosity of the supernova for each value of reddening. A peculiar Type II supernova, SN 1993J gradually evolved spectroscopically to resemble a Type Ib in some respects. We compare its bolometric evolution with that of the prototypical Type Ib SN 1983N, and find the two to be similar. File Summary: -------------------------------------------------------------------------------- File Name Lrecl Records Explanations -------------------------------------------------------------------------------- table.tex 153 529 LaTeX version of tables table2.dat 57 86 Leuschner 76 cm observations of SN 1993J table3.dat 55 47 Leuschner 50 cm observations of SN 1993J table7.dat 54 50 La Palma observations of SN 1993J table14.dat 52 95 Summed optical fluxes of SN 1993J table15.dat 43 95 Blackbody temp. and luminosity of SN 1993J -------------------------------------------------------------------------------- Byte-by-byte Description of file: table2.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 9 A9 --- UT UT date 10-17 F8.2 d JD Julian Date - 2440000 18-23 F6.2 mag U *[]? U band magnitude 24 A1 --- u_U *[:+] Uncertainty flag for U 25-30 F6.2 mag B []? B band magnitude 31 A1 --- u_B *[:+] Uncertainty flag for B 32-37 F6.2 mag V []? V band magnitude 38 A1 --- u_V *[:+] Uncertainty flag for V 39-44 F6.2 mag R []? R band magnitude 45 A1 --- u_R *[:+] Uncertainty flag for R 46-51 F6.2 mag I []? I band magnitude 52 A1 --- u_I *[:+] Uncertainty flag for I 53 1X --- --- Blank 54-57 A4 --- Notes [CP?] C = cloudy, P = poor seeing -------------------------------------------------------------------------------- Notes for file: table2.dat -------------------------------------------------------------------------------- U: 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. u_U, u_B, u_V, u_R, u_I: ":" denotes an uncertain value, and "+" one which has been derived using color terms from the previous or following night. -------------------------------------------------------------------------------- Byte-by-byte Description of file: table3.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 9 A9 --- UT UT date 10-17 F8.2 d JD Julian Date - 2440000 18-23 F6.2 mag U []? U band magnitude 24 A1 --- u_U *[:+] Uncertainty flag for U 25-30 F6.2 mag B []? B band magnitude 31 A1 --- u_B *[:+] Uncertainty flag for B 32-37 F6.2 mag V []? V band magnitude 38 A1 --- u_V *[:+] Uncertainty flag for V 39-44 F6.2 mag R []? R band magnitude 45 A1 --- u_R *[:+] Uncertainty flag for R 46-51 F6.2 mag I []? I band magnitude 52 A1 --- u_I *[:+] Uncertainty flag for I 53 1X --- --- Blank 54-55 A2 --- Notes [CP] C = cloudy, P = poor seeing -------------------------------------------------------------------------------- Notes for file: table3.dat -------------------------------------------------------------------------------- u_U, u_B, u_V, u_R, u_I: ":" denotes an uncertain value, and "+" one which has been derived using color terms from the previous or following night. -------------------------------------------------------------------------------- Byte-by-byte Description of file: table7.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 9 A9 --- UT UT date 10-17 F8.2 d JD Julian Date - 2440000 18-23 F6.2 mag U []? U band magnitude 24-30 F7.2 mag B []? B band magnitude 31-37 F7.2 mag V []? V band magnitude 38-44 F7.2 mag R []? R band magnitude 45-51 F7.2 mag I []? I band magnitude 52-53 2X --- --- Blank 54 A1 --- Notes *[IP] See notes -------------------------------------------------------------------------------- Notes for file: table7.dat -------------------------------------------------------------------------------- Notes: All data are from the 1-m Jacobus Kapteyn Telescope unless marked I. I = Isaac Newton Telescope; P = poor conditions -------------------------------------------------------------------------------- Byte-by-byte Description of file: table14.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 8 F8.2 d JD Julian Date - 2440000 9-19 E11.3 mW/m2 Flux Fluxes from measured light curves 20-30 E11.3 mW/m2 LowExt Fluxes for extinction [E(B-V)=0.08 mag] 31-41 E11.3 mW/m2 ModExt Fluxes for extinction [E(B-V)=0.32 mag] 42-43 2X --- --- Blank 44-45 A2 --- Site *Observing site 46-47 2X --- --- Blank 48-52 A5 --- Bands Bands summed to determine fluxes -------------------------------------------------------------------------------- Notes for file: table14.dat -------------------------------------------------------------------------------- Site: LP = La Palma; KP = Kitt Peak; L = Leuschner -------------------------------------------------------------------------------- Byte-by-byte Description of file: table15.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 8 F8.2 d JD Julian Date - 2440000 9-14 I6 K LowTemp Temp from low ext. [E(B-V)=0.08 mag] 15-20 F6.2 10+42.mW/m2 LowLum Bolometric luminosity from LowTemp 21-26 I6 K ModTemp Temp from mod. ext. [E(B-V)=0.32 mag] 27-32 F6.2 10+42.mW/m2 ModLum Bolometric luminosity from ModTemp 33-34 2X --- --- Blank 35-36 A2 --- Site *Observing site 37-38 2X --- --- Blank 39-43 A5 --- Bands Bands used to determine luminosities -------------------------------------------------------------------------------- Notes for file: table15.dat -------------------------------------------------------------------------------- Site: LP = La Palma; KP = Kitt Peak; L = Leuschner -------------------------------------------------------------------------------- ================================================================================ (End) Lee Brotzman [ADS] 20-Apr-1994


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