Mid Infrared Calibration Standards Stars

ESO Mid-Infrared Calibration Standard Stars

This list has been compiled from the list of ISO standard stars using the following selection criteria:

           1) Flux at 12um(IRAS) > 5Jy
           2) No M spectral type
           3) No variable stars
           4) Photometry should be fit by a model spectral energy distribution to within 3 per cent

In some cases the selection criteria has been weakened so to obtain 1 standard for each hour of right ascension.

Table 1: Selection of calibration stars. Parameters RA, Dec, visual magnitude (V mag) and spectral type have been taken from SIMBAD. IRAS 12um fluxes are to be used as a guide only. For more accurate photometry see Table 2 below.

HD	RA(2000)	Dec(2000)	V mag	IRAS 12 um (Jy)	Spectral Type	Other names	Notes
1522	00: 19:25.674	-08: 49:26.14	3.56	13.09	K2III	-	-
4128	00: 43: 35.372	-17: 59:11.77	2.04	39.31	K0III	-	V?
6805	01: 08: 35.396	-10: 10:56.17	3.44	13.55	K2III	-	V
12929	02: 07: 10.407	+23: 27: 44.72	2.00	77.8	K2III	Alpha Ari	E, V
29139	04: 35: 55.240	+16: 30: 33.49	0.85	699.7	K5III	Alpha Tau	V
29291	04: 35: 33.039	-30: 33: 44.43	3.82	6.76	G8III	-	-
32887	05: 05: 27.660	-22: 22: 15.72	3.2	56.8	K4III	Epsilon Lep	V
37160	05: 36: 54.388	+09: 17: 26.42	4.09	6.70	G8III-IV	-	-
48915	06: 45: 08.917	-16: 42: 58.02	1.90	5.04	A0IV	- Sirius	-
81420	09: 25: 24.036	-05: 07: 02.62	5.60	7.41	K5III	-	-
81797	09: 27: 35.240	-08: 39: 31.00	2.00	157.6	K3III	Alpha Hya	E, V
110458	12: 42: 35.452	-48: 48: 47.19	4.67	5.83	K0III	-	E
108903	12: 31: 09.959	-57: 06: 47.56	1.63	865.4	M3.5V	Gamma Crux	V
123139	14: 06: 40.949	-36: 22: 11.84	2.06	38.52	K0IIIb	-	-
124897	14: 15: 39.672	+19: 10: 56.77	-0.04	521.04	K1.5III	Alpha Bootes	-
133774	15: 06: 37.600	-16: 15: 24.54	5.20	8.01	K5III	-	-
156277	17: 21: 59.478	-67: 46: 14.41	7.42	5.28	K2III	-	-
169916	18: 27: 58.240	-25: 25: 18.12	2.83	20.97	K1IIIb	-	-
175775	18: 57: 43.802	-21: 06: 23.96	3.53	12.85	G8/K0II/III	-	-
178345	19: 10: 01.757	-39: 20: 26.87	4.10	8.33	K0II/IIIC	-	-
187642	19: 50: 47.002	+08: 52: 05.96	0.77	21.86	A7IV-V	-	-
189831	20: 03: 33.459	-37: 56: 26.51	4.77	8.16	K5III	-	-
196171	20: 37: 34.032	-47: 17: 29.41	3.12	15.08	K0III	-	-

Notes:
E - known error in IRAS flux
V - variable star

Table 2: Absolute photometry of selected stars for wavelength corresponding to TIMMI2 filters. Parameters are the HD catalogue number (HD) and the TIMMI2 filter names (measured central wavelength are available here).
Values for HD29291, HD124897 and HD187642 are taken from SED models by P. Hammersely. All other values are taken from models by Cohen et al (AJ 115, 2092, 1998). One-sigma flux error bars are 3%.

HD	L (Jy)	M (Jy)	N7.9 (Jy)	N1 (Jy)	N8.9 (Jy)	N9.8 (Jy)	N10.4 (Jy)	N11.9 (Jy)	N12.9 (Jy)	Q1 (Jy)	Q2 (Jy)
WEL	3.84	4.72	7.72	8.58	8.64	9.49	10.24	11.56	12.20	17.75	18.75
HD1522	112.64	61.08	29.46	23.90	23.56	19.96	17.59	13.81	12.34	5.91	5.29
HD4128	322.81	194.18	85.60	69.61	68.69	57.57	49.52	39.44	35.30	16.97	15.22
HD6805	118.93	64.50	31.11	25.23	24.88	21.08	18.58	14.58	13.03	6.24	5.59
HD12929	481.19	244.19	122.27	99.73	98.54	85.15	75.30	59.99	53.91	25.77	23.52
HD29139	3960.	2063.72	963.02	776.43	768.26	672.82	604.06	491.13	438.51	207.77	187.45
HD29291	54.69	32.41	14.79	12.06	11.92	9.92	8.56	6.78	6.10	2.92	2.62
HD32887	334.74	174.38	81.38	65.61	64.92	56.86	51.04	41.50	37.06	17.56	15.84
HD37160	56.61	34.05	15.01	12.20	12.04	10.09	8.68	6.91	6.19	2.98	2.67
HD47105	43.47	29.61	11.60	9.45	9.29	7.74	6.65	5.23	4.74	2.27	2.03
HD81420	41.51	21.63	10.09	8.14	8.05	7.05	6.33	5.15	4.60	2.18	1.96
HD81797	833.22	436.78	198.27	160.55	158.03	141.19	128.76	100.57	90.34	43.14	38.69
HD108903	0.	2662.	1403.	1102.	1088.94	927.37	866.04	708.55	619.00	296.69	267.41
HD110458	32.68	19.66	8.66	7.05	6.95	5.83	5.01	3.99	3.57	1.72	1.54
HD123139	334.07	200.98	88.58	72.04	71.09	59.56	51.26	40.81	36.53	17.57	15.75
HD124897	4361.	2159.	1109.52	905.65	891.29	770.92	681.71	534.89	486.83	231.89	208.86
HD133774	71.98	37.51	17.51	14.11	13.96	12.23	10.98	8.93	7.97	3.78	3.41
HD156277	43.71	23.78	11.52	9.20	9.06	7.63	6.74	5.35	4.81	2.31	2.07
HD169916	182.33	98.88	47.70	38.71	38.13	32.32	28.48	22.35	19.98	9.56	8.56
HD175775	113.30	61.44	29.64	24.04	23.70	20.08	17.70	13.89	12.42	5.94	5.32
HD178345	67.04	40.33	17.78	14.46	14.26	11.96	10.29	8.19	7.33	3.53	3.16
HD187642	200.24	136.74	53.35	43.41	42.88	35.64	30.72	24.28	21.81	10.41	9.34
HD189831	68.57	35.72	16.67	13.44	13.30	11.65	10.46	8.50	7.59	3.60	3.24
HD196171	122.18	73.50	32.39	26.35	25.99	21.79	18.74	14.92	13.36	6.42	5.76

Spectroscopic images

Ascii tables for the spectra of each source can be downloaded from here.

All of the standards are listed in the file standards.tex.

This list of ESO Mid-infrared Calibration Standards has been compiled by Ralf Siebenmorgen on 18/01/2001


Send comments to `<ls-infrared@eso.org>` Last update: 20 Feb 2005

TIMMI 2