Hamuy et al. Spectrophotometric Standards

The CTIO group headed by M. Hamuy have obtained new observations of 10secondary spectrophotometric standards (from Taylor, ApJS, 54, 259, 1984)and 19 tertiary spectrophotometric standards from the lists of Stoneand Baldwin (MNRAS, 204, 347, 1983) and Stone (ApJ, 218,767, 1977).Two papers detail the observations: the first is devoted towavelengths from 3300 to 7550A (Hamuy et al., PASP, 104, 533, 1992);the second to wavelengths from 6000 to 10500A (Hamuy et al., PASP, 106,566, 1994). The second paper consolidates both sets of observationsand presents AB magnitudes for the 10 secondary standards at 16A intervalsfrom 3300 to about 10400A and for the 19 tertiary standards at 50A intervalsfrom 3300 to about 10300A. The ABMAG is converted to flux (ergs/cm/cm/s/A)through the formula
ABMAG = -2.5 alog10(Fnu) - 48.59
where Fnu is in ergs/cm/cm/s/Hz.

 

                      Secondary Standard Stars

HR Star MK Type (U-B) (B-V) V (V-R)KC (V-I)KC
----------------------------------------------------------------------
718 Xi2 Cet B9 III -O.107 -0.056 4.279 -0.023 -0.063
1544 Pi2 Ori Al V 0.01 4.355 0.014 0.039
3454 Eta Hya B3 V -0.743 -0.200 4.295 -0.083 -0.200
4468 Theta Crt B9.5 V -0.18 -0.07 4.700 -O.023 -0.063
4963 Theta Vir A1 IV -O.01 -O.00 4.375 O.003 O.010
5501 108 Vir B9.5 V -0.080 -0.023 5.681 O.004 -O.026
7001 Alpha Lyr AO V 0.00 0.00 0.03 -0.037 -0.045
7596 58 Aql AO II1 -0.01 0.10 5.62
7950 Epsilon Aqr A1 V 0.029 -0 001 3.778 -0.005 -0.010
8634 Zeta Peg B8 V -0.24 -0.09 3.40 -0.037 -0.079
9087 29 Psc B7 III-IV -O.5O1 -O.136 5.120 -0.052 -O.122

Tertiary Standard Stars

Star alpha (2000.0) delta Type (U-B) (B-V) V (V-R)KC (R-I)KC n PM(RA) PM(Dec)
("/yr)
------------------------------------------------------------------------------------------------
CD-34 241 00:41:46.9 -33:39:09 f -0.065 +0.478 11.229 +0.295 +0.289 4 -0.45 -0.25
LTT 1020 01:54:49.7 -27:28:29 g -0.186 +0.557 11.522 +0.361 +0.364 4 0.33 -0.21
EG 21 03:10:30.4 -68:36:05 DA -0.661 +0.039 11.379 -0.093 -0.064 3 0.00 -0.30
LTT 1788 03:48:22.2 -39:08:35 f -0.281 +0.469 13.155 +0.317 +0.332 3 0.24 -0.19
LTT 2415 05:56:24.2 -27:51:26 -0.215 +0.400 12.214 +0.267 +0.293 3 0.30 -0.18
Hiltner 600 06:45:13.5 +02:08:15 B1 -0.574 +0.179 10.441 +0.120 +0.140 2
LTT 3218 08:41:32.4 -32:56:33 DA -0.547 +0.220 11.858 +0.096 +0.111 4 -1.10 1.34
LTT 3864 10:32:13.8 -35:37:42 f -0.167 +0.495 12.171 +0.323 +0.329 3 -0.34 -0.01
LTT 4364 11:43:36.6 -64:50:24 C2 -0.664 +0.162 11.504 +0.173 +0.127 1 6.19 -0.33
Feige 56 12:06:47.3 +11:40:13 B5p
LTT 4816 12:38:50.7 -49:47:58 DA -0.656 +0.166 13.794 +0.013 +0.027 2 -0.86 -0.13
CD -32d9927 14:11:46.3 -33:03:15 AO 0.01 -0.02
LTT 6248 15:38:59.8 -28:35:34 a -0.197 +0.491 11.797 +0.319 +0.345 1 -0.25 -0.18
EG 274 16:23:33.7 -39:13:48 DA -0.969 -0.144 11.029 -0.093 -0.096 1 0.10 -0.01
LTT 7379 18:36:26.2 -44:18:37 GO -0.020 +0.605 10.225 +0.366 +0.366 6 -0.22 -0.16
LTT 7987 20:10:57.1 -30:13:03 DA -0.670 +0.046 12.230 -0.062 -0.078 2 -0.43 -0.24
LTT 9239 22:52:40.9 -20:35:27 f -0.110 +0.609 12.068 +0.397 +0.372 2 0.10 -0.33
Feige 110 23:19:58.3 -05:09:56 sdO
LTT 9491 23:19:35.2 -17:05:28 DC -0.843 +0.007 14.112 +0.045 +0.031 4 0.27 0.05

Notes
CD-34 241: This star is mistakenly named LTT 377 in Hamuy et al. (1992 & 1994)
Feige 56: The coordinates of Feige 56 are given incorrectly in Table 7 of Hamuyet al. 1992.