Optical Spectrophotometric Standards of SpT B4-A9 List taken from http://www.eso.org/sci/observing/tools/standards/spectra/hamuystandards.html based on M. Hamuy/CTIO secondary spectrophotometric standards (Taylor, ApJS, 54, 259, 1984) 2MASS JHK magnitudes and coordinates added Teff, logg, [Fe/H] and N(He)/N(H) added from Simbad (see references therein) HR Star RA (J2000) DEC (J2000) MK Type (U-B) (B-V) V (V-R) (V-I) J H K Teff logg [Fe/H] N(He)/N(H) ----------------------------------------------------------------------------------------------------------------------------------------------------------- 718 Xi2 Cet 02 28 09.55 +08 27 36.3 B9 III -O.107 -0.056 4.279 -0.023 -0.063 4.696 4.563 4.392 1544 Pi2 Ori 04 50 36.75 +08 54 00.4 Al V 0.01 4.355 0.014 0.039 3.825 4.208 4.166 3454 Eta Hya 08 43 13.48 +03 23 55.2 B3 V -0.743 -0.200 4.295 -0.083 -0.200 4.931 4.840 4.800 4468 Theta Crt 11 36 40.90 -09 48 08.0 B9.5 V -0.18 -0.07 4.700 -O.023 -0.063 4.788 4.845 4.778 4963 Theta Vir 13 09 56.99 -05 32 20.4 A1 IV -O.01 -O.00 4.375 O.003 O.010 4.531 4.556 4.391 9510 3.6 -0.02 5501 108 Vir 14 45 30.20 +00 43 02.2 B9.5 V -0.080 -0.023 5.681 O.004 -O.026 5.619 5.619 5.602 7596 58 Aql 19 54 44.79 +00 16 24.8 AO II1 -0.01 0.10 5.62 5.293 5.233 5.211 7950 Epsilon Aqr 20 47 40.55 -09 29 44.7 A1 V 0.029 -0 001 3.778 -0.005 -0.010 3.848 3.671 3.737 9470 3.64 +0.07 8634 Zeta Peg 22 41 27.73 +10 49 52.6 B8 V -0.24 -0.09 3.40 -0.037 -0.079 3.538 3.527 3.566 9087 29 Psc 00 01 49.45 -03 01 39.1 B7 III-IV -O.5O1 -O.136 5.120 -0.052 -O.122 5.399 5.454 5.438 15150 4.08 +1.00 0.027