[vsnet-survey 53] GCCS and 2MASS identifications

[Taichi Kato <tkato>]

GCCS and 2MASS identifications

(Re: [vsnet-id 275] Re: CU Vul and CS4490)

>      Although the magnitudes in the Stephenson carbon-star catalogue are
> admittedly quite rough, I note that he lists CGCS 4490 as 'i' magnitude 8
> (i.e. photographic-infrared, about 8500A---should be called 'far-red' these
> days).  Would a carbon star have faded to mag. 10 at J even if variable?
> (Presumably the variations are very small at JHK wavelengths.)

   I have looked through some GCCS stars in the 2MASS survey region.

194820.0 +305726 (2000.0) CS4492 - - 12.4 -

   No likely 2MASS counterpart?  Position in error?

194839.5 +260845 (2000.0) CS4493 16.4 - 8.3 -

   Possibly identified with the object below:

GSC2143.191 194844.58 +260820.3 (2000.0) 11.47 1
GSC2143.191 194844.64 +260820.3 (2000.0) 10.82 1
USNO1125.14498844 194844.626 +260820.32 (2000.0) 10.8 16.7
2MASS 194844.616 +260820.40 (2000.0)  0.000  0.000  0.000
IRAS19466+2600 194640.1 +260046 (1950.0)
    F12=10.96  F25=3.31  F60=3.02L F100=33.10L
    VAR=12 LRS= 1
    low S/N blue
 possibly I: oxygen-rich non-variable star without circumstellar shell
 or VII: variable star with more evolved C-rich circumstellar shell
 or VIa: non-variable star with relatively cold dust at large
      distance, may be carbon-rich
194844.6 +260819 (2000.0) IRAS19466+2600 10.490 3.353 2.985L 32.010L 12% 2(LRS)
194844.6 +260819 (2000.0) SSC19466+2600 10.490 3.353 2.985L 32.010L

GSC6899.2013 195039.26 -265242.0 (2000.0) 14.77 0
USNO0600.22644071 195039.274 -265242.01 (2000.0) 12.1 15.8
2MASS 195039.273 -265242.34 (2000.0)  9.659  8.861  8.491
195038.8 -265242 (2000.0) CS4494 14.5 - - -

   Likely identification.

GSC1627.1353 194901.52 +222205.2 (2000.0) 13.95 1 N
USNO1050.15370728 194902.064 +222200.78 (2000.0) 99.9 13.2
USNO1050.15370864 194902.136 +222200.50 (2000.0) 99.9 13.9
2MASS 194901.572 +222204.17 (2000.0)  8.454  7.235  6.731
194901.4 +222203 (2000.0) CS4499 - - 12.1 -

   Looks okay, but the GCCS magnitude looks too faint.

GSC5146.618 195024.71 -013648.5 (2000.0) 12.08 0
GSC5146.618 195024.74 -013649.6 (2000.0) 11.94 0 N
USNO0825.17158720 195024.736 -013649.21 (2000.0) 11.0 12.1
2MASS 195024.706 -013649.01 (2000.0)  9.099  8.510  8.379
195023.4 -013644 (2000.0) CS4502 - 11.4 - -
195024.6 -013648 (2000.0) 1109 1.48 TYC2-5146.618.1 (11.24 0.12) (12.99 0.39)

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