13.4 Tabular Reference Data

13.4.1 Spectral Elements for WFC3/UVIS

13.4.2 Spectral Elements for WFC3/IR

13.4.1 Spectral Elements for WFC3/UVIS

The UVIS channel has 12 filter wheels with four spectral elements each. Only one spectral element may be specified for an exposure.

The quadrant filters pass light in four discrete bands in different quadrants of the detector. These may be selected just like any other filter, but the selected filter will only produce data in one quadrant of the detector, and the image will contain data from all four quad filters in that slot. Exposures with a quad filter must be done with the UVIS-QUAD, UVIS-QUAD-FIX or UVIS-QUAD-SUB aperture.

Table 13.5: Spectral Elements for use with WFC3/UVIS

Name	Wheel	Position	Pivot 1 Wavelength (å)	Effective Width2 (å)	Description
F200LP	2	3	5686.9	(6500)	Clear; grism reference
F218W	3	1	2183.0	351.7	ISM feature
F225W	3	2	2341.0	547.3	UV Wide
F275W	9	1	2715.3	480.8	UV Wide
F280N	4	2	2796.8	22.9	MgII 2795/2802
F300X	1	2	2829.8	753.0	Extremely wide UV
F336W	4	1	3361.1	553.8	U, Stromgren u
F343N	4	3	3438.0	140.0	[NeV] 3426
F350LP	11	2	6812.0	(4500)	Long Pass
F373N	9	4	3729.6	39.2	[OII] 3726/3728
F390M	8	1	3893.8	210.5	CaII continuum
F390W	11	1	3904.6	953.0	Washington C
F395N	10	4	3953.7	72.9	CaII H&K (3933/3968)
F410M	9	2	4107.0	182.8	Stromgren v
F438W	10	1	4318.7	676.8	WFPC2 B
F467M	9	3	4680.7	218.0	Stromgren b
F469N	3	4	4687.5	37.2	HeII 4686
F475W	6	1	4760.6	1488.9	SDSS g'
F475X	10	3	4917.1	2199.6	Extremely wide blue
F487N	2	1	4870.7	48.4	Hβ 4861
F502N	2	2	5009.0	57.8	[OIII] 5007
F547M	8	2	5447.0	714.0	Stromgren y
F555W	7	1	5309.8	1595.1	WFPC2 V
F600LP	6	3	8430.2	(4000)	Long Pass
F606W	6	2	5907.0	2304.2	WFPC2 Wide V
F621M	8	3	6216.7	631.0	11% passband
F625W	5	1	6254.0	1575.4	SDSS r'
F631N	1	3	6303.0	43.1	[OI] 6300
F645N	4	4	6451.6	85.0	Continuum
F656N	1	4	6561.1	13.9	Hα 6563
F657N	3	3	6565.1	96.3	Wide (Hα +[NII])
F658N	11	3	6585.2	23.6	[NII] 6583
F665N	5	2	6654.4	109.0	z (Hα + [NII])
F673N	5	3	6764.5	100.5	[SII] 6717/6731
F680N	5	4	6878.6	323.6	z (Hα + [NII])
F689M	7	4	6886.0	708.6	11% passband
F763M	8	4	7636.3	798.6	11% passband
F775W	10	2	7733.6	1486.0	SDSS i'
F814W	7	2	8304.7	2543.3	WFPC2 Wide I
F845M	6	4	8468.9	886.7	11% passband
F850LP	7	3	9756.4	(1500)	SDSS z'
F953N	2	4	9529.7	84.6	[SIII] 9532
Quadrant Filters (Readout Amplifier included in the Position)
FQ232N	12	1C	2326.9	32.2	CII] 2326
FQ243N	12	1D	2420.6	34.8	[Ne IV] 2425
FQ378N	12	1B	3790.9	89.2	z ([OII] 3726)
FQ387N	12	2A	3873.0	23.1	[NeIII]3868
FQ422M	12	2C	4217.7	113.3	Blue Continuum
FQ436N	12	2D	4366.7	35.7	[OIII] 4363 + Hγ 4340
FQ437N	12	1A	4370.6	24.6	[OIII] 4363
FQ492N	12	2B	4932.1	101.0	z (Hβ)
FQ508N	11	4A	5089.7	117.9	z ([OIII] 5007)
FQ575N	11	4C	5755.9	12.9	[NII] 5754
FQ619N	12	4A	6197.5	61.6	CH4 6194
FQ634N	12	4C	6347.5	66.2	6194 continuum
FQ672N	11	4D	6716.1	14.9	[SII] 6717
FQ674N	11	4B	6729.5	10.0	[SII] 6731
FQ727N	12	4D	7274.7	64.8	CH4 7270
FQ750N	12	4B	7500.6	68.8	7270 continuum
FQ889N	12	3A	8891.8	93.7	CH4 25 km-agt3
FQ906N	12	3C	9056.7	94.0	CH4 2.5 km-agt
FQ924N	12	3D	9246.3	89.2	CH4 0.25 km-agt
FQ937N	12	3B	9371.1	91.9	CH4 0.025 km-agt
UV Grism
G280	1	1	(2775)	1850	UV grism

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1

“Pivot wavelength” is a measure of the effective wavelength of a filter (see A. Tokunaga & W. Vacca 2006, PASP, 117, 421). It is calculated here based only on the filter transmission. Values are approximate for the long-pass filters. All wavelength measurements in this table were made in air.

2

Full width at 50% of peak transmission for wide and medium bands, and at 10% of peak transmission for narrow bands. For long-pass filters, the widths are approximate and include convolution with the detector QE.

3

km-agt (km-amagat) is a unit of vertical column density, equal to 2.69â1024 molecules/cm2

 

13.4.2 Spectral Elements for WFC3/IR

The IR channel has a single filter wheel with 17 spectral elements. Only one spectral element may be specified for an exposure.

Table 13.6: Spectral Elements for use with WFC3/IR

Name	Position	Pivot1 Wavelength (nm)	Effective Width2 (nm)	Description
F098M	6	982.93	169.48	Blue grism reference
F105W	5	1048.95	292.30	Wide Y
F110W	4	1141.40	503.40	Wide YJ
F125W	2	1245.90	301.50	Wide J
F126N	15	1258.26	11.83	[FeII]
F127M	11	1273.64	68.79	H2O/CH4 continuum
F128N	12	1283.30	13.54	Paschenβ
F130N	13	1300.62	13.28	Paschenβ continuum
F132N	14	1319.04	13.07	Paschenβ (redshifted)
F139M	10	1383.80	64.58	H2O/CH4 line
F140W	8	1392.10	399.00	Wide JH gap; red grism reference
F153M	9	1533.31	68.78	H2O and NH3
F160W	1	1540.52	287.88	WFC3 H
F164N	17	1645.13	17.48	[FeII]
F167N	16	1667.26	17.16	[FeII] continuum
G102	7	(1025)	250	Blue high-resolution grism
G141	3	(1410)	600	Red low-resolution grism

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1

“Pivot wavelength” is defined as in Table 13.5. All wavelength measurements in this table were made in air.

2

Full width at 50% of peak transmission.