CAFE: Signal-to-noise ratio for different observed objects

Table shows the results of the S/N analysis, for all the targets observed along the commisioning run, including the date, the name of the target, the V-band magnitude and the S/N at the average wavelength of this band (~5500AA). These results can be directly compared with the ones derived for FOCES. We highlight here the results derived for the G5 star with V-band magnitude of 6.9 mag, derived with FOCES, obtaining a S/N~41 for a exposure time of 60 sec. This can be compared with the result we obtain for HF151541, with CAFE, a V~7.1 mag star, for which we obtain a S/N~68 for with a exposure time of 60 sec. The fainest object listed in the FOCES signal webpage, is a 0p star with a luminosity of V~10.5 mag, for which it was obtained a spectra with a S/N~25 with a exposure time of 600 seconds. A similar star, BD+25d4655, V~10.6 mag, was observed with CAFE, for which we obtained a spectrum with a S/N~45, for with a similar exposure time (t_exp~ 600 sec).



CAFE: Two examples of the spectra and S/N derived for a bright (V~7 mag) and a faint (V~14.5 mag) star, with similar spectral features at the considered wavelength range (order 97).


Summary of the Observed objects along the Commissioning nights
Time Object Exposure Estimated S/N
  Name Time AB mag.  
11-06-16T03:03:00 THD182572 30 4.7 81.3
11-06-16T00:49:41 HD154345 60 6.3 62.8
11-06-17T23:19:53 HD115404 30 6.7 69.5
11-06-16T00:45:04 HD154345 30 6.8 73.3
11-06-19T03:25:07 HD190404 50 6.8 80.8
11-06-19T02:18:33 HD151541 50 7.1 68.1
11-06-18T21:04:44 HD115404 30 7.1 40.7
11-06-18T03:23:20 HD090404 50 7.1 84.1
11-06-17T23:35:51 HD139323 30 7.2 45.7
11-06-18T01:04:29 HD151541 50 7.2 59.6
11-06-18T23:44:03 HD139323 30 7.3 60.7
11-06-18T01:33:24 BD+25d4655 600 10.6 44.4
11-06-17T21:46:51 Feige66 1200 10.8 81.3
11-06-19T02:08:19 TrES-2b 1800 11.0 79.6
11-06-18T03:12:31 TrES-2b 1800 11.0 55.3
11-06-15T23:22:36 WASP-24b 1800 11.3 88.1
11-06-16T02:57:13 TrEs-2 1800 11.3 98.7
11-06-18T23:35:28 TrES-2b 1800 11.3 79.9
11-06-17T22:14:10 BD+33d2642 1200 11.4 73.1
11-06-18T00:52:22 TrES-2b 1800 11.4 55.6
11-06-16T01:27:21 Tres-2 1800 11.5 98.1
11-06-17T21:13:45 HZ44 1800 11.8 69.0
11-06-19T00:41:05 TrES-3b 2700 12.0 76.1
11-06-18T02:32:04 TrES-3b 2700 12.2 74.8
11-06-16T02:24:05 Tres-3b 2700 12.2 92.2
11-06-18T22:03:56 TrES-3b 2700 12.3 75.7
11-06-15T22:30:10 HAT-P-12b 2700 12.4 74.6
11-06-17T23:14:34 TrES-3b 2700 12.6 60.7
11-06-18T00:11:11 P330D 1800 12.9 49.1
11-06-18T20:58:34 P330D 1800 13.2 43.5
11-06-16T00:29:44 KOI-561B 3600 13.6 58.9
11-06-19T01:30:06 Kepler-561 2700 13.6 42.1
11-06-18T23:00:47 Kepler-561 2700 13.8 39.0
11-06-19T03:12:25 Kepler-561 2700 14.5 26.0