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Bright Stars with Spectral Types B-G

A list of bright telluric standard stars of spectral types B-G for calibration of Michelle spectra is provided below, along with estimated (in most cases) magnitudes at N and Q. Note the following advice on use of the stars in the list below.


  • At low resolution B, A, F, and G stars have smooth spectra in the 7-25um region, and therefore all may be used to correct for atmospheric absorption features. At moderate resolution G stars also should be avoided, but B-F stars are OK. At high resolution only B and early A stars are suitable (except for measuring hydrogen lines).
  • All of the stars in the list are bright enough to obtain good S/N lowN grating spectra in reasonably short integrations.
  • For medN1 spectra, only the stars brighter than ~1st magnitude are bright enough.
  • For medN2 and lowQ spectra, only the stars brighter than ~0th magnitude are bright enough.
  • For echelle spectra, only Sirius (BS 2491) is bright enough; asteroids almost always must be used.

       HR/BS	   RA    (2000)  Dec           V     Sp		   N & Q (est)
                                                            * ==> existing photometry
        1713     5:14:32.27   -8:12:05.9      0.12   B8Iab          0.0
        1791     5:26:17.51  +28:36:26.8      1.68   B7III          1.7
        2618     6:58:37.55  -28:58:19.5      1.51   B2Iab          2.0
        3982    10:08:22.31  +11:58:01.9      1.35   B7V            1.6
        5056    13:25:11.58  -11:09:40.8      1.04   B1III-IVD	    1.6
        6879    18:24:10.32  -34:23:04.6      1.80   B9.5III        1.6 

        2421     6:37:42.70  +16:23:57.3      1.90   A0IV           1.8
        2491     6:45:08.92  -16:42:58.0     -1.47   A1V            N=-1.42*, Q=1.36* 
        2891     7 34 35.9   +31 53 18        1.58   A1VD           1.6
        4534    11 49 03.58  +14 34 19.4      2.14   A3V            N=1.84*, Q=1.83*
        4905    12 51 50.08  +56 13 51.2      1.76   A0p            1.7
        5793    15 32 34.14  +26 52 54.7      2.21   A0V            N=2.19*, Q=2.04*
        6556    17 34 56.07  +12 33 36.1      2.10   A5III          1.5
        7001    18 36 56.34  +38 47 01.3      0.00   A0V            N=0.00*, Q=0.00
        7557    19 50 47.00  +08 52 06.0      0.77   A7V            0.2
        7924    20 41 25.91  +45 16 49.2      1.25   A2Iae          0.8
        8728    22 57 39.05  -29 37 20.1      1.16   A3V            1.1

        1017     3 24 19.37  +49 51 40.2      1.82   F5Iab          0.4
        1543     4 49 50.41  +06 57 40.6      3.19   F6V            2.0
        1865     5 32 43.82  -17 49 20.2      2.60   F0Ib           1.6
        2693     7 08 23.48  -26 23 35.5      1.84   F8Iab          0.2
        2943     7 39 18.12  +05 13 30.0      0.34   F5IV-V         N=-0.76*, Q=-0.73*
        3775     9 32 51.43  +51 40 38.3      3.20   F6IV           1.9
        6553    17 37 19.13  -42 59 52.2      1.86   F1II           0.7
        6615    17 44 05.10  -40 06 34.9      3.02   F2Iae          1.8
        7264    19 09 45.83  -21 01 25.0      2.89   F2II/III       1.7
        7796    20 22 13.70  +40 15 24.0      2.24   F8Iab          0.3

         437     1 31 29.01  +15 20 45.0      3.63   G7IIa          1.4
         509     1 44 04.08  -15 56 14.9      3.50   G8V            1.6
         510     1 45 23.63  +09 09 27.8      4.27   G8III          2.0
         854     2 54 15.46  +52 45 44.9      3.94   G4III+A4V      1.9
         915     3 04 47.79  +53 30 23.2      2.95   G8III+A2V      1.0
        1030     3 24 48.79  +09 01 43.9      3.62   G6III          1.5
        1195     3 49 27.25  -36 12 00.9      4.17   G9II-III       1.9
        1409     4 28 37.00  +19 10 49.6      3.54   G9.5III        1.1
        1464     4 35 33.04  -30 33 44.4      3.82   G8III          1.5
        1708	 5 16 41.36  +45 59 52.8      0.08   G5III          N=-1.94*, Q=-1.93*	 
        1784     5 23 56.83  -07 48 29.0      4.14   G8III          1.8
        1829     5 28 14.72  -20 45 34.0      2.84   G5II           0.7
        2134     6 04 07.21  +23 15 48.2      4.15   G5III          2.0
        2219     6 15 22.69  +29 29 53.1      4.35   G8.5IIIb       2.0
        2296     6 22 06.83  -33 26 11.0      3.85   G7II           1.6
        2473     6 43 55.93  +25 07 52.0      3.02   G8Ib           0.7
        2821     7 25 43.60  +27 47 53.1      3.79   G9IIIb         1.4
        2985     7 44 26.85  +24 23 52.8      3.57   G8IIIa         1.3
        3045     7 49 17.66  -24 51 35.2      3.34   G6Ia           1.2
        3438     8 40 06.14  -35 18 30.1      3.97   G7Ib-II        1.7
        3477     8 44 23.95  -42 38 57.4      4.06   G5III          2.0
        3475     8 46 41.82  +28 45 35.6      4.03   G8Iab          1.7
        3484     8 46 22.54  -13 32 51.8      4.32   G8III          2.0
        3482     8 46 46.51  +06 25 07.7      3.38   G5III          1.3
        3547     8 55 23.63  +05 56 44.0      3.13   G9II-III       0.8
        3873     9 45 51.07  +23 46 27.3      2.98   G1II           1.1
        4058    10 19 58.65  +19 50 25.6      3.5    G7III          1.3
        4100    10 27 53.00  +36 42 26.0      4.22   G9IIIb         1.9        
        4450    11 33 00.12  -31 51 27.5      3.54   G7III          1.3
        4471    11 36 56.93  -00 49 25.5      4.31   G9III          2.0
        4608    12 05 12.54  +08 43 58.7      4.13   G8IIIa         1.8
        4786    12 34 23.23  -23 23 48.3      2.65   G5II           0.5
        4932    13 02 10.60  +10 57 32.9      2.83   G8III          0.5
        5020    13 18 55.30  -23 10 17.4      3.00   G8III          0.7
        5089    13 31 02.66  -39 24 26.3      3.9    G9Ib           1.5
        5235    13 54 41.08  +18 23 51.8      2.68   G0IV           1.1
        5602    15 01 56.76  +40 23 26.0      3.49   G8IIIa         1.2
        5681    15 15 30.16  +33 18 53.4      3.47   G8III          1.2
        6075    16 18 19.29  -04 41 33.0      3.24   G9.5IIIb       1.8
        6148    16 30 13.20  +21 29 22.6      2.79   G7IIIa         0.6
        6212    16 41 17.16  +31 36 09.8      2.89   G0IV           1.3
        6220    16 42 53.77  +38 55 20.1      3.49   G7.5IIIb       1.2
        6536    17 30 25.96  +52 18 05.0      2.79   G2Iab          0.9
        6623    17 46 27.53  +27 43 14.4      3.41   G5IV           1.5
        6703    17 57 45.89  +29 14 52.4      3.71   G8III          1.4
        7602    19 55 18.79  +06 24 24.3      3.71   G8IV           1.6
        7754    20 18 03.26  -12 32 41.5      3.59   G6/8III        1.3
        7884    20 38 20.28  -01 06 18.4      4.31   G8III          2.0
        8115    21 12 56.19  +30 13 36.9      3.20   G8III          0.9
        8167    21 22 14.80  -16 50 04.4      4.30   G8III          2.0
        8204    21 26 40.03  -22 24 40.8      3.75   G4Ib           1.5
        8232    21 31 33.53  -05 34 16.2      2.91   G0Ib           1.1
        8252    21 33 58.85  +45 35 30.6      4.00   G8III          1.7
        8414    22 05 47.04  -00 19 11.5      2.95   G2Ib           1.0
        8499    22 16 50.04  -07 46 59.8      4.18   G8III          1.9
        8650    22 43 00.14  +30 13 16.5      2.95   G2II-III+F0V   1.0
        8667    22 46 31.88  +23 33 56.4      3.96   G8Iab          1.6
        8684    22 50 00.19  +24 36 05.7      3.51   G8III          1.2
        8720    22 55 56.90  -32 32 22.7      4.23   G8III          1.9
        8961    23 37 33.84  +46 27 29.3      3.82   G8III          1.5

  In estimating N and Q magnitudes note the following.  
        V-N = V-Q ~ -1    for B0V and ~-0.6 for B0III
                  =  0    for A0V and ~+0.3 for A0III
                  ~ +0.75 for F0V and ~+1.0 for F0III
                  ~ +1.45 for G0V and ~+1.8 for G0III
                  ~ +1.50 for G2V
                    +2.05 for K0V  and ~2.4 for K0III