The Cassini Atlas Of Stellar Spectra


CAOSS comprises of near infrared low-resolution spectra of bright stars recovered from space-based observations by the Cassini spacecraft. The atlas is dominated by red giant stars, but also contains spectra of nearby bright stars from many other spectral classes. The spectra presented are free of all spectral contamination caused by the Earth's atmosphere, including the detrimental telluric molecular bands which put parts of the near infrared spectrum out of reach of terrestrial observations. With a single instrument, a spectro-photometric dataset is recovered that continuously spans the near infrared from 0.8 to 5.1 microns. Spectra have been calibrated into absolute flux units after careful characterisation of the instrumental spectral efficiency. Spectral energy distributions for most stars match closely with literature values.

The data reduction process is described in detail by Stewart et. al. 2015 (ApJ Supplement, accepted).

The data is available as a four column IPAC ASCII table, a fits image, or Python Pickle, with the columns being centre wavelength, flux density (Jy), error in centre wavelength, and error in flux density in all formats.

The correction described in Section 3 of Stewart et. al. 2015 is available in ASCII, FITS, or as a Python Pickle.

CAOSS can be downloaded as a single file containing all data products from all epochs of all stars, as either a tarball or a zip file. (~7MB)


Star Name HIP Alias R.A. & Dec Mission Seq. UTC JD Spectr. Type Spectr. Ref. Var. Type Downloadable Files
30 Psc 154 YY Psc 00 01 57.62 -06 00 50.66 S25 2006-11-5 2454044 M3 III M73 Lb: IPAC FITS Pickle
bet And 5447 01 09 43.92 +35 37 14.01 S18 2006-2-1 2453767 M0 III var M43 nsv IPAC FITS Pickle
gam1 And 9640 02 03 53.95 +42 19 47.02 S18 2006-2-1 2453767 K3 II M73 IPAC FITS Pickle
omi Cet 10826 02 19 20.79 -02 58 39.50 S83 2014-4-11 2456758 M5-M9e J26 Mira IPAC FITS Pickle
alp Cet 14135 03 02 16.77 +04 05 23.06 S18 2006-2-1 2453767 M1.5 IIIa K89 Lb: IPAC FITS Pickle
rho Per 14354 03 05 10.59 +38 50 24.99 S18 2006-2-1 2453767 M3 II-III M73 SRb IPAC FITS Pickle
NML Tau IK Tau 03 53 28.87 +11 24 21.70 C33 2002-7-19 2452474 M9 P67 Mira IPAC FITS Pickle
gam Eri 18543 03 58 01.77 -13 30 30.67 S27 2007-2-16 2454147 M0 III-IIIb K89 Lb: IPAC FITS Pickle
alp Tau 21421 04 35 55.24 +16 30 33.49 C35 2003-1-19 2452658 K5 III M43, R52 Lb: IPAC FITS Pickle
R Dor 21479 04 36 45.59 -62 04 37.80 C33 2002-7-18 2452473 M8e M73 SRb IPAC FITS Pickle
TX Cam 05 00 50.39 +56 10 52.60 S27 2007-2-15 2454146 M8-10 W73 Mira IPAC FITS Pickle
RX Lep 24169 05 11 22.87 +05 09 02.75 S27 2007-2-16 2454147 M6 III A26 SRb IPAC FITS Pickle
alp Ori 27989 05 55 10.31 +07 24 25.43 S18 2006-2-1 2453767 M1.5 Iab M73 SRc IPAC FITS Pickle
mu Gem 30343 06 22 57.63 +22 30 48.90 S18 2006-2-1 2453767 M3 IIIab K89 Lb IPAC FITS Pickle
alp Car 30438 06 23 57.11 -52 41 44.38 C34 2002-10-19 2452566 F0 II G48 IPAC FITS Pickle
alp Car 30438 06 23 57.11 -52 41 44.38 S69 2011-7-27 2455769 F0 II G48 IPAC FITS Pickle
alp CMa 32349 06 45 08.92 -16 42 58.02 C39 2003-10-13 2452925 A1 V M43 nsv IPAC FITS Pickle
alp CMa 32349 06 45 08.92 -16 42 58.02 S69 2011-7-27 2455769 A1 V M43 nsv IPAC FITS Pickle
L2 Pup 34922 07 13 32.32 -44 38 23.06 S36 2008-1-12 2454477 M5 IIIe B85 SRb IPAC FITS Pickle
VY CMa 35793 07 22 58.33 -25 46 03.24 S36 2008-1-12 2454477 M5 Iae H72 IPAC FITS Pickle
sig Pup 36377 07 29 13.83 -43 18 05.16 S83 2014-5-1 2456778 K5 III E57 Ell: IPAC FITS Pickle
alp CMi 37279 07 39 18.12 +05 13 29.96 S08 2005-1-30 2453400 F5 IV G48 nsv IPAC FITS Pickle
R Cnc 40534 08 16 33.83 +11 43 34.46 S79 2013-7-5 2456478 M6.5-9e K74 Mira IPAC FITS Pickle
lam Vel 44816 09 07 59.76 -43 25 57.33 S36 2008-1-12 2454477 K4 Ib K89 Lc IPAC FITS Pickle
RS Cnc 45058 09 10 38.80 +30 57 47.30 S36 2008-1-12 2454477 M6S B54 SRc: IPAC FITS Pickle
RS Cnc 45058 09 10 38.80 +30 57 47.30 S79 2013-7-5 2456478 M6S B54 SRc: IPAC FITS Pickle
alp Hya 46390 09 27 35.24 -08 39 30.96 S35 2007-12-7 2454441 K3 II-III M73 nsv IPAC FITS Pickle
alp Hya 46390 09 27 35.24 -08 39 30.96 S38 2008-3-9 2454534 K3 II-III M73 nsv IPAC FITS Pickle
alp Hya 46390 09 27 35.24 -08 39 30.96 S81 2013-12-20 2456646 K3 II-III M73 nsv IPAC FITS Pickle
R Car 46806 09 32 14.60 -62 47 19.97 S38 2008-2-27 2454523 M8e III: K89 Mira IPAC FITS Pickle
R Car 46806 09 32 14.60 -62 47 19.97 S40 2008-4-26 2454582 M8e III: K89 Mira IPAC FITS Pickle
R Car 46806 09 32 14.60 -62 47 19.97 S52 2009-8-1 2455044 M8e III: K89 Mira IPAC FITS Pickle
R Leo 48036 09 47 33.49 +11 25 43.66 C37 2003-5-19 2452778 M7-9e K74 Mira IPAC FITS Pickle
R Leo 48036 09 47 33.49 +11 25 43.66 S38 2008-3-3 2454528 M7-9e K74 Mira IPAC FITS Pickle
R Leo 48036 09 47 33.49 +11 25 43.66 S40 2008-4-26 2454582 M7-9e K74 Mira IPAC FITS Pickle
R Leo 48036 09 47 33.49 +11 25 43.66 S81 2013-12-20 2456646 M7-9e K74 Mira IPAC FITS Pickle
RW LMi CIT 6 10 16 02.27 +30 34 18.60 S08 2005-1-30 2453400 C4,3e C79 SRa IPAC FITS Pickle
U Ant 51821 10 35 12.85 -39 33 45.32 S84 2014-6-29 2456837 C5,4 S44 Lb IPAC FITS Pickle
eta Car 10 45 03.55 -59 41 03.95 C33 2002-7-18 2452473 O5.5 III - O7 I T08 S Dor IPAC FITS Pickle
eta Car 10 45 03.55 -59 41 03.95 S38 2008-2-27 2454523 O5.5 III - O7 I T08 S Dor IPAC FITS Pickle
eta Car 10 45 03.55 -59 41 03.95 S81 2013-12-27 2456653 O5.5 III - O7 I T08 S Dor IPAC FITS Pickle
V Hya 53085 10 51 37.26 -21 15 00.32 S28 2007-2-25 2454156 C7.5e B54 SRa IPAC FITS Pickle
56 Leo 53449 VY Leo 10 56 01.47 +06 11 07.33 S35 2007-12-7 2454441 M5.5 III M73 Lb: IPAC FITS Pickle
ome Vir 56779 11 38 27.61 +08 08 03.47 S28 2007-3-14 2454173 M4.5: III K89 Lb IPAC FITS Pickle
ome Vir 56779 11 38 27.61 +08 08 03.47 S38 2008-3-9 2454534 M4.5: III K89 Lb IPAC FITS Pickle
nu Vir 57380 11 45 51.56 +06 31 45.74 S28 2007-3-14 2454173 M1 III M73 SRb IPAC FITS Pickle
eps Mus 59929 12 17 34.28 -67 57 38.65 S28 2007-2-25 2454156 M5 III L66 SRb: IPAC FITS Pickle
eps Mus 59929 12 17 34.28 -67 57 38.65 S38 2008-2-27 2454523 M5 III L66 SRb: IPAC FITS Pickle
eps Mus 59929 12 17 34.28 -67 57 38.65 S52 2009-8-1 2455044 M5 III L66 SRb: IPAC FITS Pickle
gam Cru 61084 12 31 09.96 -57 06 47.57 C35 2003-1-19 2452658 M3.5 III K89 nsv IPAC FITS Pickle
gam Cru 61084 12 31 09.96 -57 06 47.57 S38 2008-2-28 2454524 M3.5 III K89 nsv IPAC FITS Pickle
gam Cru 61084 12 31 09.96 -57 06 47.57 S52 2009-8-1 2455044 M3.5 III K89 nsv IPAC FITS Pickle
del Vir 63090 12 55 36.21 +03 23 50.89 S08 2005-1-30 2453400 M3 III W57, H58 nsv IPAC FITS Pickle
R Hya 65835 13 29 42.78 -23 16 52.77 C37 2003-5-18 2452777 M6.5-9e K74 Mira IPAC FITS Pickle
R Hya 65835 13 29 42.78 -23 16 52.77 S38 2008-3-19 2454544 M6.5-9e K74 Mira IPAC FITS Pickle
W Hya 67419 13 49 02.00 -28 22 03.49 C40 2003-12-1 2452974 M7.5-9e K74 SRa IPAC FITS Pickle
W Hya 67419 13 49 02.00 -28 22 03.49 S38 2008-3-19 2454544 M7.5-9e K74 SRa IPAC FITS Pickle
2 Cen 67457 V806 Cen 13 49 26.72 -34 27 02.79 S35 2007-11-14 2454418 M4.5 IIIb L66 SRb IPAC FITS Pickle
alp Boo 69673 14 15 39.67 +19 10 56.67 C25 2001-3-26 2451994 K1.5 III K89 nsv IPAC FITS Pickle
alp Boo 69673 14 15 39.67 +19 10 56.67 C27 2001-8-29 2452150 K1.5 III K89 nsv IPAC FITS Pickle
alp Boo 69673 14 15 39.67 +19 10 56.67 C34 2002-10-13 2452560 K1.5 III K89 nsv IPAC FITS Pickle
alp Boo 69673 14 15 39.67 +19 10 56.67 S16 2005-12-2 2453706 K1.5 III K89 nsv IPAC FITS Pickle
alp Boo 69673 14 15 39.67 +19 10 56.67 S36 2008-1-5 2454470 K1.5 III K89 nsv IPAC FITS Pickle
alp Boo 69673 14 15 39.67 +19 10 56.67 S53 2009-8-29 2455072 K1.5 III K89 nsv IPAC FITS Pickle
alp Cen 71683 14 39 36.49 -60 50 02.37 C40 2003-12-1 2452974 G2 V G50 IPAC FITS Pickle
alp Cen 71683 14 39 36.49 -60 50 02.37 S38 2008-3-19 2454544 G2 V G50 IPAC FITS Pickle
alp Cen 71683 14 39 36.49 -60 50 02.37 S51 2009-7-2 2455014 G2 V G50 IPAC FITS Pickle
alp Cen 71683 14 39 36.49 -60 50 02.37 S52 2009-8-1 2455044 G2 V G50 IPAC FITS Pickle
alp Cen 71683 14 39 36.49 -60 50 02.37 S72 2012-3-29 2456015 G2 V G50 IPAC FITS Pickle
bet UMi 72607 14 50 42.33 +74 09 19.81 S82 2014-2-20 2456708 K4 III var R52, M53 nsv IPAC FITS Pickle
RR UMi 73199 14 57 35.01 +65 55 56.86 S82 2014-2-20 2456708 M4.5 III K89 SRb IPAC FITS Pickle
R Ser 77615 15 50 41.74 +15 08 01.10 S78 2013-4-15 2456397 M5-7e K74 Mira IPAC FITS Pickle
del Oph 79593 16 14 20.74 -03 41 39.56 S26 2007-1-4 2454104 M0.5 III M73 nsv IPAC FITS Pickle
del Oph 79593 16 14 20.74 -03 41 39.56 S53 2009-8-29 2455072 M0.5 III M73 nsv IPAC FITS Pickle
U Her 80488 16 25 47.47 +18 53 32.86 S78 2013-4-15 2456397 M8e K74 Mira IPAC FITS Pickle
30 Her 90704 g Her 16 28 38.55 +41 52 54.04 S22 2006-7-29 2453945 M6 III M73 SRb IPAC FITS Pickle
30 Her 90704 g Her 16 28 38.55 +41 52 54.04 S53 2009-8-29 2455072 M6 III M73 SRb IPAC FITS Pickle
alp Sco 80763 16 29 24.46 -26 25 55.21 C33 2002-7-12 2452467 M1.5 Iab M73 Lc IPAC FITS Pickle
alp Sco 80763 16 29 24.46 -26 25 55.21 S31 2007-7-8 2454289 M1.5 Iab M73 Lc IPAC FITS Pickle
alp Sco 80763 16 29 24.46 -26 25 55.21 S51 2009-7-17 2455029 M1.5 Iab M73 Lc IPAC FITS Pickle
alp TrA 82273 16 48 39.89 -69 01 39.76 S08 2005-1-30 2453400 K2 III W52 IPAC FITS Pickle
alp TrA 82273 16 48 39.89 -69 01 39.76 S52 2009-8-1 2455044 K2 III W52 IPAC FITS Pickle
alp Her 84345 17 14 38.86 +14 23 25.08 S13 2005-8-28 2453610 M5 II W57 SRc IPAC FITS Pickle
alp Her 84345 17 14 38.86 +14 23 25.08 S53 2009-8-29 2455072 M5 II W57 SRc IPAC FITS Pickle
VX Sgr 88838 18 08 04.05 -22 13 26.63 S51 2009-7-17 2455029 M4 Iae H72 SRc IPAC FITS Pickle
eta Sgr 89642 18 17 37.64 -36 45 42.07 S22 2006-7-30 2453946 M3 II O60 Lb: IPAC FITS Pickle
eta Sgr 89642 18 17 37.64 -36 45 42.07 S51 2009-7-17 2455029 M3 II O60 Lb: IPAC FITS Pickle
X Oph 91389 18 38 21.12 +08 50 02.75 S26 2007-1-4 2454104 M0-8e + K2: III K74 Mira IPAC FITS Pickle
X Oph 91389 18 38 21.12 +08 50 02.75 S60 2010-5-26 2455342 M0-8e + K2: III K74 Mira IPAC FITS Pickle
R Lyr 92862 18 55 20.10 +43 56 45.93 S13 2005-8-28 2453610 M5 III var K45 SRb IPAC FITS Pickle
R Lyr 92862 18 55 20.10 +43 56 45.93 S79 2013-6-20 2456463 M5 III var K45 SRb IPAC FITS Pickle
R Aql 93820 19 06 22.25 +08 13 48.01 S60 2010-5-26 2455342 M6.5-9e K74 Mira IPAC FITS Pickle
R Aql 93820 19 06 22.25 +08 13 48.01 S69 2011-7-27 2455769 M6.5-9e K74 Mira IPAC FITS Pickle
W Aql 19 15 23.35 -07 02 50.35 S26 2007-1-4 2454104 S6/6e K80 Mira IPAC FITS Pickle
chi Cyg 97629 19 50 33.92 +32 54 50.61 S22 2006-7-29 2453945 S6-9/1-2e K80 Mira IPAC FITS Pickle
T Cep 104451 21 09 31.78 +68 29 27.20 S13 2005-8-28 2453610 M6-9e K74 Mira IPAC FITS Pickle
T Cep 104451 21 09 31.78 +68 29 27.20 S78 2013-5-29 2456441 M6-9e K74 Mira IPAC FITS Pickle
W Cyg 106642 21 36 02.50 +45 22 28.53 S79 2013-6-21 2456464 M5+ IIIa Y67 SRb IPAC FITS Pickle
mu Cep 107259 21 43 30.46 +58 46 48.16 S22 2006-7-30 2453946 M2 Ia K42 SRc IPAC FITS Pickle
pi1 Gru 110478 22 22 44.21 -45 56 52.61 S22 2006-7-30 2453946 S5,7: B54 SRb IPAC FITS Pickle
bet Gru 112122 22 42 40.05 -46 53 04.48 C34 2002-10-5 2452552 M4.5 III K89 Lc: IPAC FITS Pickle
alp PsA 113368 22 57 39.05 -29 37 20.05 C25 2001-3-28 2451996 A3 V M43 nsv IPAC FITS Pickle
alp PsA 113368 22 57 39.05 -29 37 20.05 C34 2002-10-19 2452566 A3 V M43 nsv IPAC FITS Pickle
alp PsA 113368 22 57 39.05 -29 37 20.05 C35 2003-1-22 2452661 A3 V M43 nsv IPAC FITS Pickle
alp PsA 113368 22 57 39.05 -29 37 20.05 S72 2012-3-30 2456016 A3 V M43 nsv IPAC FITS Pickle
bet Peg 113881 23 03 46.46 +28 04 58.03 S13 2005-8-28 2453610 M2.5 II-III M73 Lb IPAC FITS Pickle
R Aqr 117054 23 43 49.46 -15 17 04.14 S22 2006-7-30 2453946 M6.5-9ep K74 Mira IPAC FITS Pickle
R Cas 118188 23 58 24.87 +51 23 19.70 S08 2005-1-30 2453400 M6-9e K74 Mira IPAC FITS Pickle

Spectral Class References

A26 - Adams, W.~S., Joy, A.~H., \& Humason, M.~L.\ 1926, \apj, 64, 225
B54 - Bidelman, W.~P.\ 1954, \apjs, 1, 175
B85 - Bidelman, W.~P.\ 1985, \apjs, 59, 197
C79 - Cohen, M.\ 1979, \mnras, 186, 837
E57 - Evans, D.~S.\ 1957, Monthly Notes Astron.\ Soc.\ Southern Africa, 16, 4
E60 - Eggen, O.~J.\ 1960, \mnras, 120, 448
G48 - Greenstein, J.~L.\ 1948, \apj, 107, 151
G50 - Gascoigne, S.~C.~B.\ 1950, \mnras, 110, 15
H58 - Hoyle, F., \& Wilson, O.~C.\ 1958, \apj, 128, 604
H72 - Humphreys, R.~M., Strecker, D.~W., \& Ney, E.~P.\ 1972, \apj, 172, 75
H75 - Houk, N., \& Cowley, A.~P.\ 1975, Univ.\ of Michigan Catalogue of Two-Dimensional Spectral Types for the HD Stars. Vol.\ I (Ann Arbor, MI: Univ.\ of Michigan)
J26 - Joy, A.~H.\ 1926, \apj, 63, 281
K42 - Keenan, P.~C.\ 1942, \apj, 95, 461
K45 - Keenan, P.~C., \& Hynek, J.~A.\ 1945, \apj, 101, 265
K74 - Keenan, P.~C., Garrison, R.~F., \& Deutsch, A.~J.\ 1974, \apjs, 28, 271
K80 - Keenan, P.~C., \& Boeshaar, P.~C.\ 1980, \apjs, 43, 379
K89 - Keenan, P.~C., \& McNeil, R.~C.\ 1989, \apjs, 71, 245
L66 - Landi Dessy, J.\ \& Keenan, P.~C.\ 1966, \apj, 146, 587
M43 - Morgan, W.~W., Keenan, P.~C., \& Kellman, E.\ 1943, An Atlas of stellar Spectra, with an outline of spectral classification (Chicago: Univ. of Chicago Press)
M53 - Morgan, W.~W., Harris, D.~L., Johnson, H.~L.\ 1953, \apj, 118, 92
M73 - Morgan, W.~W., \& Keenan, P.~C.\ 1973, \araa, 11, 29
P67 - Pesch, P.\ 1967, \apj, 147, 381
R52 - Roman, N.~G.\ 1952, \apj, 116, 122
S44 - Sanford, R.~F.\ 1944, \apj, 99, 145
T08 - Teodoro, M., Damineli, A., Sharp, R.~G., Groh, J.~H., \& Barbosa, C.~L.\ 2008, \mnras, 387, 564
W52 - Woolley, R.~V.~D.~R., Gottlieb, K., \& Przybylski, A.\ 1952, \mnras, 112, 665
W57 - Wilson, O.~C., \& Vainu Baapu, M.~K.\ 1957, \apj, 125, 661
W73 - Wing, R.~F., \& Lockwood, G.~W.\ 1973, \apj, 184, 873
Y67 - Yamashita, Y.\ 1967, Publ.\ Dominion Astroph.\ Obs.\ 13, 47

Variablity Reference

Variablity for all targets is taken from the General Catalogue of Variable Stars.

Uncalibrated Spectra

The spectra listed below were processed in the same manner as those above, however did not yield resultant spectra consistent with the literature. Most of these are due to stellar flux loss where a PSF lands in the interpixel dead zone discussed in Section 2.1 of the CAOSS paper. Caution is advised when using these spectra.


Star Name HIP Alias R.A. & Dec Mission Seq. UTC JD Spectr. Type Spectr. Ref. Var. Type Downloadable Files
omi Cet 10826 02 19 20.79 -02 58 39.50 C33 2002-7-19 2452474 M5-M9e J26 Mira IPAC FITS Pickle
alp Cet 14135 03 02 16.77 +04 05 23.06 S76 2012-11-10 2456241 M1.5 IIIa K89 Lb: IPAC FITS Pickle
alp Aur 24608 Capella 05 16 41.35 +45 59 52.80 C39 2003-10-3 2452915 G1 III+K0 III Simbad nsv IPAC FITS Pickle
alp Ori 27989 05 55 10.31 +07 24 25.43 C33 2002-7-12 2452467 M1.5 Iab M73 SRc IPAC FITS Pickle
L2 Pup 34922 07 13 32.32 -44 38 23.06 S83 2014-5-1 2456778 M5 IIIe B85 SRb IPAC FITS Pickle
CW Leo IRC+10216 09 47 57.41 +13 16 43.68 C33 2002-7-18 2452473 C9 Simbad M IPAC FITS Pickle
CW Leo IRC+10216 09 47 57.41 +13 16 43.68 S76 2012-12-28 2456289 C9 Simbad M IPAC FITS Pickle
CW Leo IRC+10216 09 47 57.41 +13 16 43.68 S78 2013-3-29 2456380 C9 Simbad M IPAC FITS Pickle
CW Leo IRC+10216 09 47 57.41 +13 16 43.68 S80 2013-8-31 2456535 C9 Simbad M IPAC FITS Pickle
R Hya 65835 13 29 42.78 -23 16 52.77 S78 2013-4-4 2456386 M6.5-9e K74 Mira IPAC FITS Pickle
alp Boo 69673 14 15 39.67 +19 10 56.67 S14 2005-9-2 2453615 K1.5 III K89 nsv IPAC FITS Pickle
VX Sgr 88838 18 08 04.05 -22 13 26.63 S08 2005-1-30 2453400 M4 Iae H72 SRc IPAC FITS Pickle
alp Lyr 91262 18 36 56.33 +38 47 01.32 C39 2003-10-5 2452917 A0 Va Simbad DSCTC IPAC FITS Pickle
lam Aqr 112961 22 52 36.86 -07 34 46.56 S25 2006-11-5 2454044 M2 III Simbad LB IPAC FITS Pickle
alp PsA 113368 22 57 39.05 -29 37 20.05 C22 2000-9-18 2451805 A3 V M43 nsv IPAC FITS Pickle
alp PsA 113368 22 57 39.05 -29 37 20.05 C39 2003-10-2 2452914 A3 V M43 nsv IPAC FITS Pickle
chi Aqr 114939 23 16 50.93 -07 43 35.40 S25 2006-11-5 2454044 M3 III Simbad IPAC FITS Pickle