Hamuy Spectrophotometric Standards

M. Hamuy led a group at CTIO to obtain observations of 10 secondary spectrophotometric standards from Taylor (1984) and 19 tertiary spectrophotometric standards from Stone & Baldwin (1983) and Stone (1977). These results were published in two papers:(1) Hamuy et al. (1992) and (2) Hamuy et al. (1994). The former paper covers wavelengths from 3300Å to 7550Å and the latter paper covers wavelengths from 6000Å to 10500Å. The latter paper also combines both sets of observations and presents AB magnitudes for the 10 secondary standards at 16Å intervals from 3300Å to ~10400Å and for the 19 tertiary standards at 50Å intervals from 3300Å to ~10300Å. The AB magnitudes are converted to flux (erg cm-2 s-1Å-1) using the formula:

AB Mag = -2.5 alog10(Fν) - 48.59 where Fν is in erg cm-2 s-1 Hz-1.

Secondary Spectrophotometric Standard Stars
HR# Star MK Type (U-B) (B-V) V (V-R)KC (V-I)KC
718 ξ2 Cet B9 III -0.107 -0.056 4.279 -0.023 -0.063
1544 π2 Ori A1 V ... 0.01 4.355 0.014 0.039
3454 η Hya B3 V -0.743 -0.200 4.295 -0.083 -0.200
4468 θ Crt B9.5 V -0.18 -0.07 4.700 -0.023 -0.063
4963 θ Vir A1 IV -0.01 -0.00 4.375 0.003 0.010
5501 108 Vir B9.5 V -0.080 -0.023 5.681 0.004 -0.026
7001 α Lyr A0 V 0.00 0.00 0.03 -0.037 -0.045
7596 58 Aql A0 II1 -0.01 0.10 5.62 ... ...
7950 ε Aqr A1 V 0.029 -0.001 3.778 -0.005 -0.010
8634 ζ Peg B8 V -0.24 -0.09 3.40 -0.037 -0.079
9087 29 Psc B7 III-IV -0.501 -0.136 5.120 -0.052 -0.122

 

 

Tertiary Spectrophotometric Standard Stars
Star RA
(J2000)
Dec
(J2000)
Type (U-B) (B-V) V (V-R)KC (R-I)KC PM (RA)
(" yr-1)
PM (Dec)
(" yr-1)
 Plots
1CD-34 241 00:41:46.9 -33:39:09 f -0.065 +0.478 11.229 +0.295 +0.289 -0.45 -0.25 finder/spectrum
LTT 1020 01:54:49.7 -27:28:29 g -0.186 +0.557 11.522 +0.361 +0.364 0.33 -0.21 finder/spectrum
EG 21 03:10:30.4 -68:36:05 DA -0.661 +0.039 11.379 -0.093 -0.064 0.00 -0.30 finder/spectrum
LTT 1788 03:48:22.2 -39:08:35 f -0.281 +0.469 13.155 +0.317 +0.332 0.24 -0.19 finder/spectrum
LTT 2415 05:56:24.2 -27:51:26 ... -0.215 +0.400 12.214 +0.267 +0.293 0.30 -0.18 finder/spectrum
Hiltner 600 06:45:13.5 +02:08:15 B1 -0.574 +0.179 10.441 +0.120 +0.140 ... ... finder/spectrum
LTT 3218 08:41:32.4 -32:56:33 DA -0.574 +0.220 11.858 +0.096 +0.111 -1.10 1.34 finder/spectrum
LTT 3864 10:32:13.8 -35:37:42 f -0.167 +0.495 12.171 +0.323 +0.329 -0.34 -0.01 finder/spectrum
LTT 4364 11:45:42.9 -64:50:29 C2 -0.664 +0.162 11.504 +0.173 +0.127 6.19 -0.33 finder/spectrum
2Feige 56 12:06:47.3 +11:40:13 B5p ... ... ... ... ... ... ... finder/spectrum
LTT 4816 12:38:50.7 -49:47:58 DA -0.656 +0.166 13.794 +0.013 +0.027 -0.86 -0.13 finder/spectrum
CD-32 9927 14:11:46.3 -33:03:15 A0 ... ... ... ... ... 0.01 -0.02 finder/spectrum
LTT 6248 15:38:59.8 -28:35:34 a -0.197 +0.491 11.797 +0.319 +0.345 -0.25 -0.18 finder/spectrum
EG 274 16:23:33.7 -39:13:48 DA -0.969 -0.144 11.029 -0.093 -0.096 0.10 -0.01 finder/spectrum
LTT 7379 18:36:26.2 -44:18:37 G0 -0.020 +0.605 10.225 +0.366 +0.366 -0.22 -0.16 finder/spectrum
LTT 7987 20:10:57.1 -30:13:03 DA -0.670 +0.046 12.230 -0.062 -0.078 -0.43 -0.24 finder/spectrum
LTT 9239 22:52:40.9 -20:35:27 f -0.110 +0.609 12.068 +0.397 +0.372 0.10 -0.33 finder/spectrum
Feige 110 23:19:58.3 -05:09:56 sdO ... ... ... ... ... ... ... finder/spectrum
LTT 9491 23:19:35.2 -17:05:28 DC -0.843 +0.007 14.112 +0.045 +0.031 0.27 0.05 finder/spectrum
Notes:
1CD-34 241 is mistakenly named LTT 377 in Stone and Baldwin (1983) and Hamuy et al. (1992 & 1994).
2The coordinates of Feige 56 are given incorrectly in Hamuy et al. (1992).