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Last update: 30 Sep 2021
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SCORPIO-2:
Spectral Camera with Optical Reducer for Photometric and Interferometric Observations - 2

Broad-band filters

The broad-band glass filters made in SAO RAS are used for the observation in the Johnson-Cousins (UBVRI) photometric system in the direct images mode.


The glass filters transmission curves are shown by solid line. The measurements were done with the SCORPIO-2/VPHG940@600. The dashed lines indicate the same curves when the CCD EEV 42-40 sensitivity curve was taken into account.

The SDSS (ugriz) glass filters with anti-reflective coating made by Asahi Spectra USA Inc. are also available for direct imaging observations.


The SDSS filters transmission curves are shown by solid line, the manufacturer data. The dashed lines indicate the same curves when the CCD EEV 42-40 sensitivity curve was taken into account.

Intermediate-band filters

The set of passband filters with band width 70-200 A is available for observations in the H-alpha, [SII], [OIII] emission line and in the continuum. The majority of the filters were made by Asahi Spectra USA Inc., the FN674 filter was made by NIIPP (Moscow).


The intermediate-band filters transmission curves.

The main parameters of middle-band filters
name CWL (A) FWHM (A) Tmax(%)Profile
FN501501211987ASC-fileImage
FN608609916691ASC-fileImage
FN641641317991ASC-fileImage
FN6556559 9792ASC-fileImage
FN660660610292ASC-fileImage
FN712713720994ASC-fileImage
FN6746733 6084ASC-fileImage

The set of passband filters with band width ~250 A is available for observations emission lines, continuum and to study spectral energy distribution (SED). These filters were made by Edmund Optics..


The SED filters transmission curves.

The main parameters of middle-band SED filters
name CWL (A) FWHM (A) Tmax(%)Profile
SED400399424993ASC-fileImage
SED425425423897ASC-fileImage
SED450451725695ASC-fileImage
SED475477525193ASC-fileImage
SED500501924688ASC-fileImage
SED525527125187ASC-fileImage
SED575577324992ASC-fileImage
SED600602825399ASC-fileImage
SED625627125095ASC-fileImage
SED650651524996ASC-fileImage
SED675677326298ASC-fileImage
SED700703524297ASC-fileImage
SED725729024993ASC-fileImage
SED750754625192ASC-fileImage
SED775775023995ASC-fileImage
SED800802325891ASC-fileImage
SED825827726289ASC-fileImage
SED850850625192ASC-fileImage
SED875878125294ASC-fileImage
SED900902725590ASC-fileImage
SED925928925289ASC-fileImage
SED975976926087ASC-fileImage

The set of passband filter cut spectral range in observations in IFU mode was made by Asahi Spectra USA Inc..


The IFU filters transmission curves.

The main parameters of the IFU filters
name CWL (A) FWHM (A) Tmax(%)Profile
IFU510509879385ASC-fileImage
IFU610610278988ASC-fileImage
IFU650648275992ASC-fileImage

N.N. Kisilev (MAO, Kiev) kindly provide the set of intermediate-band filters for observations of the emission bands in comets.


The filters transmission curves of the `comets' filters measured with the SCORPIO-2 in the F/4 beam.

The main parameters of `comets' filters (for F/4 beam)
name CWL (A) FWHM (A) Tmax(%)Profile
CN_3980 3982 3613ASC-fileImage
CO+4277 3940ASC-fileImage
Cont_44304429 3661ASC-fileImage
C2_5125*511512379ASC-fileImage
NH2_66306615 3484ASC-fileImage
Cont_68406835 8388ASC-fileImage
* - the surface become degraded

The narrow band filters for observation with scanning FPI

The sets of narrow-band (FWHM=12-25 A) filters are available for observations of galaxies in the [OIII], H-alpha, [NII], [SII] emission limes. You can use this IDL-program to choose the optimal filters for desired systemic velocities.

IFP filters parameters (for F/4 beam)
name CWL (A) FWHM (A) Tmax(%)
IFP502 5017 15 50
IFP508 5077 13 60
IFP513 5125 17 23
IFP514 5143 16 47
IFP516 5161 14 56
IFP517 5179 15 42
IFP519 5189 17 50
AC5014 5018 32 73
AC5038 5036 33 70
AC5065 5061 33 74
AC5110 5103 33 78
CS5144 5134 40 90
AC5176 5172 34 73
AC5194 5197 34 75
AC5211 5204 35 75
AC5241 5238 36 74
AC5264 5268 35 74
IFP602 6054 27 39
IFP657 6570 19 52
IFP659 6606 19 64
IFP661 6627 23 62
IFP663 6650 20 58
IFP665 6654 23 33
IFP667 6667 18 55
#76B 6564 14 55
#77B 6573 13 64
#78B 6580 14 58
#79B 6591 15 52
#80B 6596 15 52
#81B 6611 14 57
AC6605 6605 20 75
CS6634 6626 29 90
CS6659 6652 29 90
AC6684 6687 28 80
AC6700 6697 19 78
AC6715 6710 19 72
AC6730 6723 20 65
AC6735 6739 30 74
AC6745 6741 20 70
AC6760 6758 17 61
AC6775 6772 17 65
AC6790 6787 20 62
AC6836 6832 19 64
AC6814 6817 31 78
AC6852 6849 19 64