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SPECTRAL TYPES ACCEPTED BY THE EXPOSURE TIME CALCULATOR

The Spectral Type of the star is used for determining Teff of the star. A look-up table of Spectral Type and Teff has been made from:

    Allen, C. W. (2000). ``Allen's Astrophysical Quantities'', ed. Arthur N. Cox, AIP Press, Springer-Verlag

    Colina, L. (1995). ``CDBS Kurucz Stellar Atmosphere'', Instrument Science Report SCS/CAL-006 (STScI/OSG).

    Lang, K. R. (1982). ``Astrophysical Data: Planets and Stars'', Springer-Verlag.


Spectral Types Teff ° K log(g)
O3V 525004.14
O4V 48000
O5V 44500
O6V 41000
O7V 38000
O8V 358003.94
O9V 34000
O9.5V 34600
B0V 300003.94
B1V 25600
B2V 22000
B3V 19000
B4V 17200
B5V 152004.04
B6V 14000
B7V 13000
B8V 11900
B9V 10700
A0V 95204.14
A1V 9230
A2V 9000
A3V 8720
A5V 8200
A7V 7930
A8V 7580
F0V 72004.34
F2V 7000
F5V 64404.34
F7V 6240
F8V 6250
G0V 59404.39
G2V 5860
G4V 5740
G5V 55604.49
G6V 5620
G8V 5570
K0V 52504.49
K1V 5080
K2V 5010
K3V 4730
K4V 4560
K5V 44104.54
K7V 4040
M0V 39404.59
M1V 3720
M2V 35304.64
M3V 3470
M4V 3370
M5V 31704.94
M6V 3050
M7V 2940
M8V 26404.94
Spectral Types Teff ° K log(g)
O3III 50000
O4III 45500
O5III 42500
O6III 39500
O7III 37000
O8III 34700
O9III 32000
B0III 290003.34
B1III 24000
B2III 20300
B3III 17100
B5III 150003.49
B6III 14100
B7III 13200
B8III 12400
B9III 11000
A0III 10100
A1III 9480
A2III 9000
A3III 8600
A5III 8100
A7III 7650
A8III 7450
F0III 7150
F2III 6870
F5III 6470
F8III 6150
G0III 59102.94
G2III 5450
G4III 5190
G5III 50502.54
G8III 4960
K0III 48102.14
K1III 4600
K2III 4500
K3III 4320
K4III 4000
K5III 40501.74
K7III 3850
M0III 38201.34
M1III 3780
M2III 3710
M3III 3630
M4III 3560
M5III 3420
M6III 3250
Spectral Types Teff ° K log(g)
O3I 47300
O4I 44100
O5I 403003.34
O6I 390003.24
O7I 35700
O8I 342003.24
O9I 32000
B0I 260002.84
B0Ib 260002.84
B1I 20800
B2I 17800
B3I 16200
B4I 13900
B5I 136002.44
B6I 13000
B7I 12000
B8I 11100
B9I 10500
A0I 99802.14
A1I 9230
A2I 9080
A3I 8770
A5I 85102.04
A7I 8150
A8I 7950
F0I 74601.74
F2I 7030
F5I 66401.44
F8I 6100
G0I 55101.34
G2I 5190
G3I 4980
G5I 49301.14
G8I 4590
K0I 45500.94
K1I 4330
K2I 4310
K3I 4250
K3Iab 4130
K4I 3950
K5I 39900.34
K5Iab 3850
K7I 3700
M0I 3650
M1I 3550
M2I 3450
M3I 3200
M4I 2980
M5I 2880
M6I 2600
WN3 50000
WN4 47000
WN5 43000
WN6 39000
WN7 32000
WN8 29000
WC6 60000
WC7 54000
WC8 46000
WC9 38000