University of Michigan - Department of Astronomy


Spectral Classification and the Pleiades - Standard Stars and Calibration Curve

 

Table 2: Standard Star Spectral Types and Magnitudes Table 3: Calibration Curve for the Blue Sensitive Emulsion
Star Name Spectral Type Abs. Blue Magnitude (MB) Luminosity (W)
Sirius A1 1.4 9.2x1027
Alpha Cen A G2 5.0 3.4x1026
Alpha Cen B K0 6.6 7.7x1025
Vega A0 0.5 2.1x1028
DM-214712 F5 4.0 8.4x1026
       
Achernar B5 -1.2 1.0x1029
Alpha Crusis B2 -4.2 1.6x1030
Spica B1 -3.9 1.2x1030
Fomalhaut A A3 2.1 4.8x1027
Fomalhaut B K4 8.4 1.5x1025
       
Proxima Cen M5 17.0 5.3x1021
Barnard's Star M5 14.8 4.0x1022
Epsilon Eridani K2 7.0 5.3x1025
Ross 128 M5 15.1 3.1x1022
61 Cygni A K5 8.8 1.0x1025
       
61 Cygni B K7 9.8 4.0x1024
Epsilon Indi K5 8.2 1.8x1025
Tau Ceti G8 6.4 9.2x1025
BD+51688 M5 13.6 1.2x1023
CD-3914192 M0 10.2 2.8x1024
       
DM+571702 F2 3.3 1.6x1027
Kapteyn's Star M0 12.2 4.4x1023
Kruger 60 M3 13.1 1.9x1023
BD+571725 K7 9.7 4.4x1024
40 Eridani A K0 6.9 5.8x1025
       
70 Ophiuchi A K1 6.6 7.7x1025
70 Ophiuchi B K5 8.7 1.1x1025
DM+13215 F0 2.9 2.3x1027
HR 3759 F6 4.2 7.0x1026
HR 3862 G0 4.8 4.0x1026
       
DM-204731 F2 3.6 1.2x1027
22 Leonis A5 3.4 1.5x1027
HR 4158 F8 4.2 7.0x1026
HR 4523 G5 5.4 2.3x1026
HR 6549 A7 3.9 9.2x1026
Diameter App. Blue Magnitude (mB) Flux (W/m2)
.3 22 2.2x10-17
.4 20 1.4x10-16
.5 18 8.7x10-16
.6 16.5 3.5x10-15
.7 15.3 1.0x10-14
.8 14.5 2.2x10-14
.9 13.6 5.0x10-14
1.0 12.8 1.0x10-13
1.1 12 2.2x10-13
1.2 11.5 3.5x10-13
1.3 11 5.5x10-13
1.4 10.6 7.9x10-13
1.5 10.2 1.1x10-12
1.6 9.8 1.7x10-12
1.7 9.4 2.4x10-12
1.8 9.0 3.5x10-12
1.9 8.6 5.0x10-12
2.0 8.4 6.0x10-12
2.1 8.2 7.2x10-12
2.2 8.1 7.9x10-12
2.3 8.0 8.7x10-12
2.4 8.0 8.7x10-12
2.5 8.0 8.7x10-12
2.6 7.9 9.5x10-12
2.7 7.8 1.0x10-11
2.8 7.7 1.1x10-11
2.9 7.6 1.3x10-11
3.0 7.5 1.4x10-11
3.1 7.1 2.0x10-11
3.2 6.8 2.6x10-11
3.3 6.6 3.2x10-11
3.4 6.4 3.8x10-11
3.5 6.1 5.0x10-11
3.6 5.8 6.6x10-11
3.7 5.5 8.7x10-11
3.8 5.2 1.1x10-10
3.9 5.0 1.4x10-10
4.0 4.4 2.4x10-10
4.1 4.2 2.9x10-10
4.2 4.1 3.2x10-10
4.3 3.7 4.6x10-10
4.4 3.4 6.0x10-10
4.5 3.2 7.2x10-10
4.6 2.8 1.0x10-9
4.7 2.5 1.4x10-9
4.8 2.2 1.8x10-9
4.9 2.0 2.2x10-9
5.0 1.7 2.9x10-9

 last update: 8/11/05