IRS: Templates and models for IRS Calibrator stars

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IRS spectra are flux calibrated at the SSC using observations of standard stars for which MARCS code model atmospheres have been developed. This tarfile contains synthetic spectra of infrared stellar standards covering 2 - 42 microns, with R=1200, and such that each resolution element is oversampled by a factor of 10. The models are scaled to the arbitrary size of 1mas for all stars. The stellar parameters, model atmospheres, synthetic spectra, and application to IRS photometric calibrations are described in Decin et al. (2005). Additional information about IRS calibration was presented at the Data Analysis Workshop and the Calibration Workshop. The MARCS models were provided to the SSC by Leen Decin for calibration purposes, but she is not responsible for IRS calibration issues.

In order to compare with IRS data, the user will need spectra that have been degraded to the spectrograph's resolution and sampling. These are presented here, together with the recommended scaling values. The models do NOT include the scaling. You can download all the degraded models together.

Names	SpT	K Mag	Flux at 12 mic (Jy)	SL2/SL1	LL2/LL1	SH/LH	Scaling	Comments
HR6688 ksi Dra HD163588	K2III	1.045	11.2	SL2/SL1	LL2/LL1	SH/LH	9.33	Star in double system (sep=5',mag_diff=11 mag) CVZ
HR7310 del Dra HD180711 57 Dra	G9III	0.883	14.9	SL2/SL1	LL2/LL1	SH/LH	11.49	Star in double sys. (sep=1.2', mag_diff=9 mag)
HR2194 eta1Dor HD42525	A0V	5.751	0.13	SL2/SL1	LL2/LL1	SH/LH	0.05	Low-res standard CVZ
HR7341 HD181597	K1III	3.655	0.97	SL2/SL1	LL2/LL1	SH/LH	0.79
HR7891 29 Vul HD196724	A0V	4.854	0.31	SL2/SL1	LL2/LL1	SH/LH	0.12
HR6705 gamDra HD164058	K5III	-1.162	108.7	SL2/SL1	LL2/LL1	SH/LH	99.11	Close to saturation limits
HR6606 HD161178	G9III	3.657	0.97	SL2/SL1	LL2/LL1	SH/LH	0.73	Photometric scaling uncertain
HR2491 HD48915 Sirius	A1V	-1.390	93.8	SL2/SL1	LL2/LL1	SH/LH	35.49	Saturates detectors
HD105	G9V	6.117	97.7	SL2/SL1	LL2/LL1	SH/LH	61.73	IRAS IR Excess

Templates and models for IRS Calibrator stars: Cohen models

This table lists templates calculated by Martin Cohen, for a subset of stars that have been observed as part of the IRS calibration program. These stars do not have tailored MARCS models and used for broader statistical testing and verification of IRS calibration. These templates were computed before the launch of Spitzer.

Name	Other Name	Type	Template
HD 41371		K0III	file
HD 42701		K3III	file
HD 46190		A0V	file
HD 91375	HR 4138	A1V	file
HD 128998	HR 5467	A1V	file
HD 154391	HR 6348	K0III	file
HD 166780		K5III	file
HD 172728	HR 7018	A0V	file
HD 173511		K5III	file

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