Realization of Vilnius UPXYZVS photometric system for AltaU42 CCD camera at the MAO NAS of Ukraine
The description of two-inch glass filters of the Vilnius UPXYZVS photometric system, which are made at the Main Astronomical Observatory of NAS of Ukraine for AltaU42 CCD camera with format of 2048×2048 pixels, is presented in the paper. Reaction curves of instrumental system are shown. Estimations...
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2005
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| Cite this: | Realization of Vilnius UPXYZVS photometric system for AltaU42 CCD camera at the MAO NAS of Ukraine / A.P. Vid'machenko, V.M. Andruk, V.S. Samoylov, O.S. Delets, P.V. Nevodovsky, Yu.M. Ivashchenko, G.U. Kovalchuk // Кинематика и физика небесных тел. — 2005. — Т. 21, № 5-додаток. — С. 551-556. — Бібліогр.: 9 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1859740806985809920 |
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| author | Vid'machenko, A.P. Andruk, V.M. Samoylov, V.S. Delets, O.S. Nevodovsky, P.V. Ivashchenko, Yu.M. Kovalchuk, G.U. |
| author_facet | Vid'machenko, A.P. Andruk, V.M. Samoylov, V.S. Delets, O.S. Nevodovsky, P.V. Ivashchenko, Yu.M. Kovalchuk, G.U. |
| citation_txt | Realization of Vilnius UPXYZVS photometric system for AltaU42 CCD camera at the MAO NAS of Ukraine / A.P. Vid'machenko, V.M. Andruk, V.S. Samoylov, O.S. Delets, P.V. Nevodovsky, Yu.M. Ivashchenko, G.U. Kovalchuk // Кинематика и физика небесных тел. — 2005. — Т. 21, № 5-додаток. — С. 551-556. — Бібліогр.: 9 назв. — англ. |
| collection | DSpace DC |
| container_title | Кинематика и физика небесных тел |
| description | The description of two-inch glass filters of the Vilnius UPXYZVS photometric system, which are made at the Main Astronomical Observatory of NAS of Ukraine for AltaU42 CCD camera with format of 2048×2048 pixels, is presented in the paper. Reaction curves of instrumental system are shown. Estimations of minimal star’s magnitudes for each filter’s band in comparison with the visual V one are obtained. New software for automation of CCD frames processing is developed in program shell of LINUX/MIDAS/ROMAFOT. It is planned to carry out observations with the purpose to create the catalogue of primary UPXYZVS CCD standards in selected field of the sky for some radio-sources, globular and open clusters, etc. Numerical estimations of astrometric and photometric accuracy are obtained.
|
| first_indexed | 2025-12-01T17:48:27Z |
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REALIZATION OF VILNIUS UPXYZVS PHOTOMETRIC SYSTEM
FOR ALTAU42 CCD CAMERA AT THE MAO NAS OF UKRAINE
A. P. Vid’machenko1, V. M. Andruk1, V. S. Samoylov2, O. S. Delets1,
P. V. Nevodovsky1, Yu. M. Ivashchenko3, G. U. Kovalchuk1
1Main Astronomical Observatory, NAS of Ukraine
27 Akademika Zabolotnoho Str., 03680 Kyiv, Ukraine
e-mail: vida@mao.kiev.ua
2Astroprylad Cooperative Society, Main Astronomical Observatory, NAS of Ukraine
31 Akademika Zabolotnoho Str., 03680 Kyiv, Ukraine
3Andrushivka Astronomical Observatory
3–7b Observatorna Str., Galchyn, Zhytomyr Region, Ukraine
The description of two-inch glass filters of the Vilnius UPXYZVS photometric system, which are
made at the Main Astronomical Observatory of NAS of Ukraine for AltaU42 CCD camera with
format of 2048×2048 pixels, is presented in the paper. Reaction curves of instrumental system
are shown. Estimations of minimal star’s magnitudes for each filter’s band in comparison with
the visual V one are obtained. New software for automation of CCD frames processing is deve-
loped in program shell of LINUX/MIDAS/ROMAFOT. It is planned to carry out observations
with the purpose to create the catalogue of primary UPXYZVS CCD standards in selected field
of the sky for some radio-sources, globular and open clusters, etc. Numerical estimations of astro-
metric and photometric accuracy are obtained.
INTRODUCTION
For the purpose to expand an opportunity of astrophysical researches of celestial objects using the AltaU42 CCD
camera the set of glass filters of the Vilnius photometric system UPXYZVS has been made in 2004. Photometric
investigation with the Vilnius system filters allows us to characterize physical properties of astronomical objects
more unequivocally. Seven-colour Vilnius system UPXYZVS enables us to carry out multivariant spectral
classification of stars at presence of interstellar reddening in all interval of their temperatures [9]. The first
stage of CCD-variant of UPXYZVS system realization will be the observations of the elected primary photo-
electric standards of the Vilnius system for northern sky [3] with camera AltaU42. The next stage is creation of
CCD-variant of the new photometric UPXYZVS standards in some areas of the sky (globular and open clusters,
infra-red and radio sources, etc.) for the purpose of carrying out of stars-statistical researches of the Galaxy. It is
planned to add such photometric researches in the Vilnius system by the measurements in Johnson’s UBVRI
system. As a result of such observational program the catalogue of stars (and other objects) for two photometric
systems and astroclimate researches in the points of observation (extinction, influence of lunar-solar inflow on
a transparency of an atmosphere, brightness of a luminescence of the night sky, trembling of an atmosphere) will
be obtained. We have an experience of carrying out of such works [2, 4, 6]. Processing of CCD images is carried
out in the MIDAS/ROMAFOT software [5, 7]. In LINUX/MIDAS/ROMAFOT environment the program
(as a MIDAS procedures) of cyclic processing of finite quantity of CCD-frame’s files in a FITS-format was
created. The ROMAFOT software was used for determination of photometric and astrometric characteristics
(star magnitude, rectangular coordinates X , Y , etc.) for all objects of star’s fields registered on CCD frames.
Quantum efficiency of CCD-camera (matrix 2048×2048 pixels) has shown in Table 1 and in Fig. 1 (a solid
line). On the same figure an atmospheric spectral transparency (equivalent thickness for ozone and water layers
are 3 and 10 mm) and mirror’s reflection are shown by the dashed line and by the points, respectively [1, 9].
THE CHARACTERISTIC OF THE MAO NAS OF UKRAINE UPXYZVS GLASS FILTERS
In March 2004 the Astroprylad Cooperative Society has made for MAO NAS of Ukraine three sets of seven
glass filters of UPXYZVS systems. Its diameter is two inches and physical thickness is 15.5 mm; quartz or
“K8” glass is added for identical filter’s optical thickness. Filters of “Golosiiv” variant of the Vilnius photo-
metric system (with AltaU42 CCD camera) are making according to the original recommendations [8, 9] with
c© A. P. Vid’machenko, V. M. Andruk, V. S. Samoylov, O. S. Delets, P. V. Nevodovsky, Yu. Ivashchenko, G. U. Kovalchuk, 2004
551
Figure 1. Spectral quantum efficiency of CCD-camera, atmospheric transparency (equivalent thickness for ozone and
water layers are 3 and 10 mm, respectively) and mirror’s reflection; transparency curve ϕ (in %) for filters of different
variant of UPXYZVS Vilnius system
the exception of filter S, which is not interference in our case. In Table 2 there is the information on filter’s
components. In Table 3 the transparency curve for filters of “Golosiiv” variant of UPXYZVS system and optical
properties of filters (wavelength λm in a maximum of transparency, half-width Δλ reaction curves, its trans-
parency for λm) are given. These data are shown in Fig. 1 too (dashed line). In this figure transparency curves
of a standard variant of glass filters of the Vilnius system (solid line) and transparency curves for the filters
made in 2002 (points) by the Astroprylad Cooperative Society for the Andrushivka Astronomical Observatory
of the Ukrainian Astronomical Association (AAO UAA) are shown. These data we used for an estimation of
the limiting magnitude of registered stars and photometric errors of the Vilnius system’s filters.
“Golosiiv’s” variant of glass filters was certificated by the Ukrainian State Research-and-Production Center
of Standardization, Metrology, and Certifications (Kyiv).
Table 1. Quantum efficiency of AltaU42 CCD camera as a function of length waves λ (nanometer) is in accordance with
advertising sheet of the manufacturer
λ % λ % λ % λ % λ %
360 25.5 490 89.0 620 92.5 750 80.0 880 48.0
370 32.0 500 90.0 630 92.0 760 78.0 890 45.0
380 38.5 510 90.5 640 91.0 770 76.5 900 42.0
390 45.5 520 91.0 650 90.5 780 74.5 910 39.0
400 52.5 530 92.0 660 90.0 790 72.5 920 37.0
410 59.5 540 92.5 670 89.5 800 70.0 930 34.0
420 64.0 550 92.8 680 89.0 810 68.0 940 31.5
430 69.5 560 92.8 690 88.0 820 66.0 950 28.0
440 73.5 570 92.8 700 87.0 830 63.0 960 26.5
450 77.5 580 92.8 710 86.0 840 60.5 970 22.5
460 81.0 590 92.8 720 84.0 850 57.0 980 20.0
470 84.0 600 92.8 730 83.5 860 54.0 990 17.0
480 88.0 610 92.7 740 82.5 870 51.0 999 16.0
552
Table 2. Compound’s components and optical properties of glass filters of UPXYZVS system of MAO NAS of Ukraine
Filters Components λm Δλ Transparency (%)
U UFS2(9.8)+quartz(4.7) 335 62.5 53.7
P SZS22(1.8)+UFS6(2.7)+quartz(10.4) 375 29.0 36.6
X ZhS4(3.3)+ZS7(6.3)+SZS21(1.9)+FS6(2.1)+quartz(1.8) 410 26.0 20.5
Y ZhS12(7.1)+SZS21(2.7)+SS15(2.1)+K8(2.7) 465 27.5 24.9
Z ZhS17(1.9)+ZS7(3.1)+SZS22(9.4) 520 18.5 28.1
V OS11(5.1)+SZS22(4.9)+PS7(2.1)+K8(2.4) 545 23.5 17.2
S KS15(1.8)+SZS23(1.9)+K8(11.0) 660 67.5 25.0
Table 3. The data of transparency curves for filters of “Golosiiv” UPXYZVS system
λ, nm ϕU ϕP λ, nm ϕX ϕY λ, nm ϕZ ϕV λ, nm ϕS
290 0.1 375 0.1 460 625 0.2
295 3.1 380 0.6 465 630 0.6
300 21.7 385 2.2 470 635 2.3
305 33.2 390 5.4 475 640 7.1
310 40.0 395 10.3 480 0.1 645 14.3
315 45.1 400 15.7 485 0.3 650 20.5
320 48.8 405 20.1 490 0.4 655 24.1
325 51.7 410 20.5 495 0.1 0.3 660 25.1
330 53.4 415 13.0 500 0.3 0.3 665 24.4
335 53.7 420 4.5 505 3.2 0.2 670 23.1
340 52.5 0.1 425 1.8 510 12.9 0.1 675 21.3
345 50.5 1.0 430 0.4 515 24.5 0.1 680 19.4
350 47.5 4.0 425 0.2 520 28.1 0.3 685 17.6
355 42.8 10.3 440 0.6 0.1 525 22.4 0.6 690 15.8
360 35.8 18.8 445 1.2 0.9 530 12.0 1.6 695 14.1
365 25.9 27.9 450 0.7 7.2 535 3.6 4.8 700 12.6
370 15.2 34.4 455 0.3 18.2 540 1.0 12.3 705 11.2
375 5.9 36.6 460 0.3 24.5 545 0.5 17.2 710 10.0
380 1.1 32.5 465 0.1 24.9 550 0.9 16.9 715 8.8
385 0.1 22.6 470 21.5 555 1.9 13.6 720 7.8
390 10.9 475 16.4 560 1.3 9.7 725 6.9
395 3.0 480 11.4 565 0.6 5.9 730 6.1
400 0.4 485 7.2 570 0.2 1.2 740 4.8
405 490 4.3 575 0.1 0.1 760 3.0
410 495 2.5 580 780 2.0
415 500 1.5 585 800 1.4
420 510 0.3 590 830 0.5
TRANSPARENCY CURVES FOR “GOLOSIIV” VARIANT OF UPXYZVS SYSTEM
The main role at formation of reaction curves of “telescope + CCD” photometric system is due to optical filters.
The “Golosiiv’s” system resulting curve is shown in Fig. 2 by dashed line and standard Vilnius system – by solid
line. In the top part of Fig. 2 the half-width of “Golosiiv’s” (thin line) and standard’s reaction of the Vilnius
photometric system are shown.
COMPARISON OF PHOTOMETRIC SYSTEMS. LIMITING STAR’S MAGNITUDES
The 2002 spring-and-summer observations of various sky areas (which have UBVR photoelectric standards)
using the CCD “FPZS S1C-017” (without filters) at the AAO UAA Zeiss-600 telescope has allowed us to
establish that the limiting star magnitude is Mex = 21m at about 10 min exposure time. The knowledge of
this value allows us to estimate Mex for observations with the “Golosiiv’s” filters. A difference of limiting star
magnitude Δmi in integral light and in any of UPXYZVS filters of “Golosiiv’s” system may be calculated as
Δmi = 2.5 log
(∫
e(λ)g(λ)c(λ)dλ
/∫
e(λ)g(λ)c(λ)ϕi(λ)dλ
)
, (1)
553
Figure 2. Results reaction transparency curves of the “Golosiiv’s” and standard’s Vilnius photometric system
where e(λ), g(λ), c(λ), ϕi(λ) are the transparency of an average atmosphere (layers of ozone and water are 3
and 10 mm), spectral mirror’s reflection and spectral “matrix AltaU42+filter” sensitivity curves, respectively,
for every λ. An average wavelength λ0i and amount of registered energy Ei for every i-th filter are expressed as
λ0i =
∫
ϕi(λ)λdλ
/∫
ϕi(λ)dλ , (2)
Ei =
∫
e(λ)g(λ)c(λ)ϕi(λ)dλ
/∫
e(λ)g(λ)c(λ)dλ . (3)
The results of calculations are given in Table 4. Average wavelengths and half-width of reaction curves
for “Golosiiv” and standard photometric system are λ0G, λ0S and ΔλG, ΔλS , respectively; their difference is
λ0G−λ0S , amount of registered energy for “Golosiiv’s” filters is Ei. There are also limiting star magnitude limG
(for 10 min exposure time) for “Golosiiv”, standard photometric system limS , and their difference limG – limS .
Clearly, from Table 4 that at an 10 min exposure (the Zeiss-600 telescope and AltaU42 matrix) using “Golosiiv”
(or standard) filters in Kyiv conditions of observation, a star with V =15.90m (or V =16.48m) will be accessible
to registration.
AN ESTIMATION OF PHOTOMETRIC ACCURACY OF CCD OBSERVATIONS
IN THE VILNIUS SYSTEM
An estimation of CCD photometry accuracy with the Vilnius system on example of processing of IC 4665 sky
area observations obtained in May 2003 at the Andrushivka Astronomical Observatory was make at the 7.5′×7.5′
field size. There are six photoelectric stars standards of the Vilnius system. The CCD-frames obtained with
Table 4. Comparison between “Golosiiv” and standard variants of transparency curves UPXYZVS systems
Filter λ0G ΔλG λ0S ΔλS λ0G − λ0S E limG limS limG − limS
nm nm nm nm nm % mag mag mag
U 356 37.0 345 40/52 11 0.40 15.00 14.56 0.43
P 375 25.0 374 26/26 1 0.51 15.26 15.35 −0.09
X 410 20.0 405 22/47 5 0.48 15.21 15.60 −0.39
Y 465 28.0 466 26/40 −1 1.21 16.21 16.34 −0.13
Z 520 18.0 516 21/25 4 1.15 16.15 16.72 −0.56
V 545 24.0 544 26/48 1 0.91 15.90 16.48 −0.58
S 660 65.0 655 20/32 5 3.54 17.27 16.22 1.15
554
an 60 s exposure have been processed in the MIDAS/ROMAFOT software. Comparison of star magnitudes
differences ΔU , ΔP , ΔY , ΔZ, ΔV , ΔS for two successive CCD frames is shown on the left of Fig. 3. A root-
mean-square error for one measurement of star brighter than 13m is ±0.02m ÷ 0.03m. Comparison of stars
magnitudes from our CCD observational results with photo-electric standards of the Vilnius system is shown
on the right of Fig. 3. The error on external convergence ranges from ±0.03m to ±0.07m.
Figure 3. On the left: star magnitudes differences for two successive CCD frames; on the right: root-mean-square errors
CONCLUSIONS
“Golosiiv” glass UPXYZVS filters of the Vilnius system are made and have passed metrological certification.
The research of transparency curves of “Golosiiv” photometric system is carried out and comparison with
standard one is made. The estimation of the limiting star magnitude Mex in each filter with AltaU42 CCD
camera for the MAO NAS of Ukraine conditions is obtained. An accuracy estimation of CCD photometry
with the Vilnius system was making on example of processing of the observations obtained in May 2003 at
the Andrushivka Astronomical Observatory. The accuracy estimation of a star magnitude determination is
made. The list of the observational programs to create the primary CCD standards in UPXYZVS filters of
the Vilnius system is formed.
All experts having any interest in cooperative work on determination of stars magnitudes in Vilnius photo-
metric system by the CCD method are invited.
555
Acknowledgements. Work is executed at partial financial support of the Scientific and Technological Center
in Ukraine (grant NN43) and of the National Space Agency of Ukraine (contract “Astro”).
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[3] Andruk V., Bartasiute S., Kharchenko N. UBVR and UPXYZVS sequences of standard stars for the MEGA
program fields along the Main Meridian of the Galaxy // Baltic Astron.–1996.–5.–P. 197–206.
[4] Andruk V. N., Butenko G. Z., Kuznetsov V. I., et al. Investigation of the seeing for the 2-m telescope at Terskol
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[5] Andruk V. N., Parusimov V. G., Dudnik T. B. The experience of digital processing of stellar fields images in
the MIDAS/ROMAFOT software // Kinematics and Physics of Celestial Bodies. Suppl. Ser.–1999.–N 1.–P. 100–103.
[6] Butenko G., Snezhko L., Andruk V., et al. Express-method development of optical unstable atmosphere estima-
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[7] MIDAS Users Guide, European Southern Observatory – Image Processing Group 1994, Garching, ESO, 1994.–
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| id | nasplib_isofts_kiev_ua-123456789-79720 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 0233-7665 |
| language | English |
| last_indexed | 2025-12-01T17:48:27Z |
| publishDate | 2005 |
| publisher | Головна астрономічна обсерваторія НАН України |
| record_format | dspace |
| spelling | Vid'machenko, A.P. Andruk, V.M. Samoylov, V.S. Delets, O.S. Nevodovsky, P.V. Ivashchenko, Yu.M. Kovalchuk, G.U. 2015-04-03T20:29:14Z 2015-04-03T20:29:14Z 2005 Realization of Vilnius UPXYZVS photometric system for AltaU42 CCD camera at the MAO NAS of Ukraine / A.P. Vid'machenko, V.M. Andruk, V.S. Samoylov, O.S. Delets, P.V. Nevodovsky, Yu.M. Ivashchenko, G.U. Kovalchuk // Кинематика и физика небесных тел. — 2005. — Т. 21, № 5-додаток. — С. 551-556. — Бібліогр.: 9 назв. — англ. 0233-7665 https://nasplib.isofts.kiev.ua/handle/123456789/79720 The description of two-inch glass filters of the Vilnius UPXYZVS photometric system, which are made at the Main Astronomical Observatory of NAS of Ukraine for AltaU42 CCD camera with format of 2048×2048 pixels, is presented in the paper. Reaction curves of instrumental system are shown. Estimations of minimal star’s magnitudes for each filter’s band in comparison with the visual V one are obtained. New software for automation of CCD frames processing is developed in program shell of LINUX/MIDAS/ROMAFOT. It is planned to carry out observations with the purpose to create the catalogue of primary UPXYZVS CCD standards in selected field of the sky for some radio-sources, globular and open clusters, etc. Numerical estimations of astrometric and photometric accuracy are obtained. Work is executed at partial financial support of the Scientific and Technological Center in Ukraine (grant NN43) and of the National Space Agency of Ukraine (contract “Astro”). en Головна астрономічна обсерваторія НАН України Кинематика и физика небесных тел MS6: New Trends, Research Directions, and Perspective Programs in the Field of Astronomy and Astrophysics Realization of Vilnius UPXYZVS photometric system for AltaU42 CCD camera at the MAO NAS of Ukraine Article published earlier |
| spellingShingle | Realization of Vilnius UPXYZVS photometric system for AltaU42 CCD camera at the MAO NAS of Ukraine Vid'machenko, A.P. Andruk, V.M. Samoylov, V.S. Delets, O.S. Nevodovsky, P.V. Ivashchenko, Yu.M. Kovalchuk, G.U. MS6: New Trends, Research Directions, and Perspective Programs in the Field of Astronomy and Astrophysics |
| title | Realization of Vilnius UPXYZVS photometric system for AltaU42 CCD camera at the MAO NAS of Ukraine |
| title_full | Realization of Vilnius UPXYZVS photometric system for AltaU42 CCD camera at the MAO NAS of Ukraine |
| title_fullStr | Realization of Vilnius UPXYZVS photometric system for AltaU42 CCD camera at the MAO NAS of Ukraine |
| title_full_unstemmed | Realization of Vilnius UPXYZVS photometric system for AltaU42 CCD camera at the MAO NAS of Ukraine |
| title_short | Realization of Vilnius UPXYZVS photometric system for AltaU42 CCD camera at the MAO NAS of Ukraine |
| title_sort | realization of vilnius upxyzvs photometric system for altau42 ccd camera at the mao nas of ukraine |
| topic | MS6: New Trends, Research Directions, and Perspective Programs in the Field of Astronomy and Astrophysics |
| topic_facet | MS6: New Trends, Research Directions, and Perspective Programs in the Field of Astronomy and Astrophysics |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/79720 |
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