UVES Exposure Time Calculator

Near Ultraviolet-Visual-Near Infrared Spectroscopy Mode Version 2.8.5 This application is an exposure time calculator for the ESO UT2 UVES instrument. It is a HTML/Java application realized within the VLT Data Flow Project.	Version 2.8.5
	Description.
	F.A.Q
	Performance

Simulator Setup:

Input Flux Distribution:
- Source Type: Template spectra
- Spectral Type Name: Pickles_A0V
- Redshift Z: 0
- Object Magnitude: 6
- Band: V
Spatial Distribution: Point Source
Sky Conditions:
- Days From New Moon: 7
- Airmass: 1.3
- Seeing: 1.5 arcsec
Instrument Setup:
- Pre Slit Filter: comp/filt/nofilter.dat
- Image Slicer: None
- Slit Width: 0.5 arcsec
- Observation Mode: STANDARD Template.
- Central Wavelength: 346 (nm)
- Camera Tilt: 0 pixel(s)
- Dicroic Selection: Dicroic1
- Arm Cross Disperser Combination: Blue, CD#1
- Below Slit Filter: ins/ut2/uves/eqm/filt/flt_BS6-Her_5.dat
- Detector Read Out Mode: fast
- Detector Gain: low
- Mask Binning: 1x1
- Exposure Time: 60 seconds.

Parameters for: Blue, CD#1, EEV CCD
- gain conversion factor = 2.06 e-/ADU

**Spectral Format, Blue, CD#1, EEV CCD**
**Selected Central Wavelength 346 nm**
Order	wav of central column (nm)	y of central column (pix)	y of central column (arcsec)	FSR range (nm)	FSR l Min (nm)	FSR l Max (nm)	start wav (nm)	end wav (nm)	TS range (nm)
121	385.76	1997	504	3.19	383.86	387.04	382.42	388.35	5.94
122	382.60	1919	484	3.13	380.73	383.86	379.28	385.17	5.89
123	379.49	1843	465	3.08	377.64	380.73	376.20	382.04	5.84
124	376.43	1769	446	3.03	374.61	377.64	373.16	378.96	5.80
125	373.42	1695	428	2.98	371.62	374.61	370.17	375.93	5.76
126	370.45	1623	410	2.94	368.69	371.63	367.23	372.94	5.71
127	367.53	1552	392	2.89	365.80	368.69	364.34	370.01	5.67
128	364.66	1482	374	2.85	362.95	365.80	361.49	367.12	5.63
129	361.83	1413	357	2.80	360.15	362.95	358.68	364.27	5.59
130	359.05	1345	340	2.76	357.39	360.15	355.92	361.47	5.55
131	356.31	1279	323	2.72	354.67	357.39	353.20	358.71	5.51
132	353.61	1213	306	2.68	351.99	354.67	350.52	355.99	5.47
133	350.95	1148	290	2.64	349.36	351.99	347.89	353.32	5.43
134	348.33	1084	274	2.60	346.76	349.36	345.29	350.68	5.39
135	345.75	1022	258	2.56	344.20	346.76	342.73	348.08	5.35
136	343.20	960	242	2.52	341.68	344.20	340.20	345.52	5.32
137	340.70	899	227	2.48	339.19	341.68	337.72	343.00	5.28
138	338.23	839	212	2.45	336.74	339.19	335.27	340.52	5.25
139	335.79	780	197	2.41	334.33	336.74	332.86	338.07	5.21
140	333.40	722	182	2.38	331.95	334.33	330.48	335.65	5.18
141	331.03	664	168	2.35	329.60	331.95	328.13	333.27	5.14
142	328.70	607	153	2.31	327.29	329.60	325.82	330.92	5.11
143	326.40	552	139	2.28	325.01	327.29	323.54	328.61	5.07
144	324.13	497	125	2.25	322.76	325.01	321.29	326.33	5.04
145	321.90	442	112	2.22	320.54	322.76	319.07	324.08	5.01
146	319.69	389	98	2.19	318.36	320.54	316.88	321.86	4.98
147	317.51	336	85	2.16	316.20	318.36	314.72	319.67	4.95
148	315.37	284	72	2.13	314.07	316.20	312.60	317.51	4.91
149	313.25	233	59	2.10	311.97	314.07	310.50	315.38	4.88
150	311.16	182	46	2.07	309.89	311.97	308.42	313.28	4.85
151	309.10	132	33	2.05	307.85	309.89	306.38	311.20	4.82
152	307.07	83	21	2.02	305.83	307.85	304.36	309.16	4.79
153	305.06	34	9	1.99	303.84	305.83	302.37	307.14	4.77

Slit transmission: 0.305289
Medium pixel scale on Y direction: 0.252396 arcsec/pix
Number of Pixels per Bin on X direction: 1 pix/bin
PSF extension (Number of pixels along Y over which the sky signal is integrated): 12 pix(s)
Slit_Width * Bin_Scale * PSF_Extension: 1.51438 arcsec²
Number of bins along Y over which the sky signal is integrated: 12 bin(s)
Read Out Noise is 4.1 e-
Dark Current is 1 e/h

**Detected Counts (Dicroic1 Arm Blue, CD#1, EEV CCD)**
	FSR Min Wavelength					Wavelength of central column							FSR Max Wavelength
Order	Eff. %	Obj e-	Sky e-	Imax e-	S/N per spectral bin	lambda (nm)	bin size (nm)	Eff. %	Obj e-	Sky e-	Imax e-	S/N per spectral bin	Eff. %	Obj e-	Sky e-	Imax e-	S/N per spectral bin
121	0.86	1.96e+04	0.252	3.9e+03	1.4e+02	385.76	0.002	1.8	5.9e+04	0.451	1.2e+04	2.4e+02	0.9	2.61e+04	0.203	5.2e+03	1.6e+02
122	0.82	2.48e+04	0.237	4.9e+03	1.6e+02	382.60	0.002	1.7	4.13e+04	0.426	8.2e+03	2e+02	0.86	1.49e+04	0.192	3e+03	1.2e+02
123	0.79	1.69e+04	0.223	3.3e+03	1.3e+02	379.49	0.002	1.6	2.74e+04	0.4	5.4e+03	1.6e+02	0.82	1.89e+04	0.181	3.7e+03	1.4e+02
124	0.76	1.42e+04	0.21	2.8e+03	1.2e+02	376.43	0.0019	1.6	2.74e+04	0.377	5.4e+03	1.6e+02	0.79	1.29e+04	0.17	2.6e+03	1.1e+02
125	0.73	1.2e+04	0.198	2.4e+03	1.1e+02	373.42	0.0019	1.5	2.2e+04	0.356	4.4e+03	1.5e+02	0.76	1.09e+04	0.161	2.2e+03	1e+02
126	0.69	1.01e+04	0.186	2e+03	99	370.45	0.0019	1.4	1.92e+04	0.337	3.8e+03	1.4e+02	0.73	9.26e+03	0.152	1.8e+03	95
127	0.66	9.62e+03	0.173	1.9e+03	97	367.53	0.0019	1.4	1.73e+04	0.315	3.4e+03	1.3e+02	0.69	7.77e+03	0.144	1.5e+03	87
128	0.62	8.69e+03	0.16	1.7e+03	92	364.66	0.0019	1.3	1.59e+04	0.293	3.2e+03	1.3e+02	0.66	7.43e+03	0.134	1.5e+03	85
129	0.58	7.98e+03	0.147	1.6e+03	88	361.83	0.0019	1.2	1.44e+04	0.27	2.9e+03	1.2e+02	0.62	6.72e+03	0.124	1.3e+03	81
130	0.55	7.48e+03	0.139	1.5e+03	85	359.05	0.0019	1.1	1.34e+04	0.25	2.7e+03	1.2e+02	0.58	6.19e+03	0.114	1.2e+03	77
131	0.53	7.39e+03	0.132	1.5e+03	85	356.31	0.0018	1.1	1.3e+04	0.237	2.6e+03	1.1e+02	0.55	5.81e+03	0.108	1.2e+03	75
132	0.52	6.97e+03	0.126	1.4e+03	82	353.61	0.0018	1	1.27e+04	0.226	2.5e+03	1.1e+02	0.53	5.75e+03	0.103	1.1e+03	75
133	0.5	6.62e+03	0.121	1.3e+03	80	350.95	0.0018	1	1.21e+04	0.217	2.4e+03	1.1e+02	0.52	5.44e+03	0.0983	1.1e+03	72
134	0.48	6.43e+03	0.114	1.3e+03	79	348.33	0.0018	0.99	1.15e+04	0.206	2.3e+03	1.1e+02	0.5	5.18e+03	0.0942	1e+03	71
135	0.46	5.98e+03	0.107	1.2e+03	76	345.75	0.0018	0.94	1.09e+04	0.194	2.2e+03	1e+02	0.48	5.03e+03	0.0891	1e+03	70
136	0.44	5.97e+03	0.101	1.2e+03	76	343.20	0.0018	0.9	1.04e+04	0.183	2.1e+03	1e+02	0.46	4.69e+03	0.084	9.3e+02	67
137	0.42	5.34e+03	0.0952	1.1e+03	72	340.70	0.0018	0.87	1.02e+04	0.174	2e+03	1e+02	0.44	4.69e+03	0.0796	9.3e+02	67
138	0.39	4.99e+03	0.0871	9.9e+02	69	338.23	0.0018	0.82	9.14e+03	0.162	1.8e+03	95	0.42	4.21e+03	0.0749	8.3e+02	63
139	0.36	4.67e+03	0.0792	9.3e+02	67	335.79	0.0017	0.76	8.63e+03	0.147	1.7e+03	92	0.39	3.93e+03	0.0687	7.8e+02	61
140	0.33	4.26e+03	0.0726	8.4e+02	64	333.40	0.0017	0.7	7.94e+03	0.134	1.6e+03	88	0.36	3.69e+03	0.0625	7.3e+02	59
141	0.31	4e+03	0.0664	7.9e+02	62	331.03	0.0017	0.65	7.22e+03	0.123	1.4e+03	84	0.33	3.37e+03	0.0574	6.7e+02	56
142	0.28	3.54e+03	0.0591	7e+02	58	328.70	0.0017	0.6	6.56e+03	0.112	1.3e+03	80	0.31	3.17e+03	0.0526	6.3e+02	55
143	0.25	3.07e+03	0.0521	6.1e+02	54	326.40	0.0017	0.54	5.99e+03	0.0992	1.2e+03	76	0.28	2.81e+03	0.0469	5.6e+02	51
144	0.22	2.66e+03	0.045	5.3e+02	50	324.13	0.0017	0.48	5.18e+03	0.0869	1e+03	71	0.25	2.44e+03	0.0414	4.8e+02	47
145	0.19	2.39e+03	0.0386	4.7e+02	47	321.90	0.0017	0.42	4.47e+03	0.0748	8.9e+02	65	0.22	2.12e+03	0.0359	4.2e+02	44
146	0.16	1.93e+03	0.0316	3.8e+02	42	319.69	0.0017	0.36	4.12e+03	0.0638	8.2e+02	63	0.19	1.91e+03	0.0308	3.8e+02	42
147	0.13	1.51e+03	0.0249	3e+02	36	317.51	0.0017	0.29	3.22e+03	0.051	6.4e+02	55	0.16	1.55e+03	0.0252	3.1e+02	37
148	0.099	1.14e+03	0.0191	2.3e+02	31	315.37	0.0016	0.23	2.47e+03	0.0399	4.9e+02	48	0.13	1.21e+03	0.0199	2.4e+02	32
149	0.074	825	0.0142	1.6e+02	26	313.25	0.0016	0.18	1.88e+03	0.0302	3.7e+02	41	0.099	911	0.0153	1.8e+02	27
150	0.055	633	0.0104	1.3e+02	22	311.16	0.0016	0.13	1.28e+03	0.0222	2.5e+02	33	0.074	662	0.0114	1.3e+02	23
151	0.041	479	0.0076	95	18	309.10	0.0016	0.098	997	0.0163	2e+02	29	0.055	509	0.00835	1e+02	19
152	0.03	338	0.00556	67	15	307.07	0.0016	0.073	688	0.0119	1.4e+02	23	0.041	386	0.00612	77	16
153	0.023	264	0.00414	52	12	305.06	0.0016	0.054	548	0.00876	1.1e+02	20	0.03	272	0.00448	54	13

If in the table the Imax appears on a red background it means that the CCD detector has reached saturation. Please choose a different input parameters setting.

 ASCII data     GIF plot

 ASCII data     GIF plot

 ASCII data     GIF plot

 ASCII data     GIF plot

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UVES Exposure Time Calculator

Near Ultraviolet-Visual-Near Infrared Spectroscopy Mode

Simulator Setup: