|
|
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 |
Go back to IRS page
|
