Observations

OBSERVATORY TECHNICAL PARAMETERS

IRIDA South

IRIDA North

Telescope: Ritchey Chretien Astrograph, D = 300 mm (12”)
CCD camera: ATIK 4000M, active size 2048 x 2048 px, pixel size 7.4 mk, cooling: -45 degrees below the ambient temperature, real measured Gain = 0.45 e-/ADU, Read noise = 8.62 e-;
Working configurations: f/5 with focal reducer, FOV = 35.5 х 35.5 arcmin, FL = 1 470 mm, Image scale = 1.04 arcsec/px
Filters: B, V, Ic, (Johnson-Cousins); g’, r’, i’ (SLOAN type); SA200 diffraction grating for spectral analyses
Mount: ASA - DDM85 Premium Direct Drive Mount -100 kg payload
Dome – 3m ScopeDome (Poland)
Remote control through internet.

Telescope: ASA 12” Newton Astrograph, D = 300 mm (12”)
CCD camera: SBIG STL 11000M, active size 4008 x 2745 px, pixel size 9 mk, cooling: -40 degrees below the ambient temperature, real measured Gain = 0.63 e-/ADU, Read noise = 8.65 e-;
Working configurations: f/3.6 with focal reducer, FOV = 115 х 78 arcmin, FL = 1 080 mm, Image scale = 1.72 arcsec/px
Filters: broadband (color): L (clear, UVand IR cut), r' (SLOAN), i' (SLOAN) G (green), B (blue); narrowband: Ha – 7 nm (656.2 nm), OIII – 8.5 nm (500.7 nm), Rcont (red continuum)
Mount: ASA - DDM85 Direct Drive Mount -65 kg payload
Dome – 3m ScopeDome (Poland)
Remote control through internet.

PUBLICATIONS
	SAO/NASA Astrophysics Data System (ADS)	orcid.org/0000-0003-1415-9525	Research Gate	SCOPUS preview
			PY Boo and NSVS 7328383: Two totally-eclipsing W UMa stars with small mass ratios and close parameters Kjurkchieva, D. P.; Marchev, D. V.; Popov, V. A.	Photometric and spectral observations of two W UMa stars with periods of one third of a day Kjurkchieva, D. P.; Marchev, D. V.; Popov, V. A.	A Study of the Hα Variability of Be Stars Dimitrov, Dinko P.; Kjurkchieva, Diana P.; Ivanov, Emil I.
NSVS 2569022: a peculiar binary among the W UMa stars with extremely small mass ratios Diana P. Kjurkchieva, Velimir A. Popov, Nikola I. Petrov	Observations and light curve solutions of a selection of middle-contact W UMa binaries Kjurkchieva, Diana Petrova; Popov, Velimir Angelov; Lyubenova Vasileva, Doroteya; Petrov, Nikola Ivanov	Observations and Light Curve Solutions of the Eclipsing Binaries KR Lyn, CSS J110212+244412, NSVS 4917488 and NSVS 7336024 Kjurkchieva, D.; Popov, V. A.; Eneva, J.; Petrov, N.	New observations and transit solutions of the exoplanets HAT-P-53b and XO-5b Kjurkchieva, Diana; Petrov, Nikola; Ibryamov, Sunay; Nikolov, Grigor; Popov, Velimir	Observations and light curve solutions of three W UMa stars with periods of a quarter of a day Kjurkchieva, Diana P.; Michel, Raul; Popov, Velimir A.	Observations and light curve solutions of a selection of shallow-contact W UMa binaries Diana P. Kjurkchieva, Velimir A. Popov, Doroteya L. Vasileva, Nikola I. Petrov
Observations and light curve solutions of three ultrashort-period W UMa binaries Diana P. Kjurkchieva, Raul Michel, Velimir A. Popov, Dan Deras	Observations and Modeling of the Transiting Exoplanets XO-2b, HAT-P-18b, and WASP-80b Kjurkchieva, Diana P.; Popov, Velimir A.; Petrov, Nikola I.	Observations and light curve solutions of six deep-contact W UMa binaries Kjurkchieva, D. P.; Popov, V. A.; Vasileva, D. L.; Petrov, N. I.	Intra-night variability of the blazar CTA 102 during its 2012 and 2016 giant outbursts Bachev, R.; Popov, V.; Strigachev, A.; Semkov, E.; Ibryamov, S.; Spassov, B.; Latev, G.; Muñoz Dimitrova, R. V.; Boeva, S.	Intra-night optical activity of the blazar CTA 102 during its maximum state Velimir Popov, Rumen Bachev	V2551 Cyg: a pulsating star with enigmatic peculiarities Diana P. Kjurkchieva, Velimir A. Popov, Dragomir V. Marchev, Kenneth T. Menzies and Nikola I. Petrov
Observations and light curve solutions of the eclipsing stars CSS J075205.6+381909 and NSVS 691550 D. Kjurkchieva, V. Popov, D. Vasileva, Y. Eneva, S. Ibryamov	Observations and light curve solutions of the eclipsing W UMa binaries CSS J071813.2+505000, NSVS 2459652, NSVS 7178717 and NSVS 7377875 D. Kjurkchieva, V. Popov, D. Vasileva, N. Petrov	Discovery of optical flickering from the symbiotic star EF Aquilae Zamanov, R. K.; Boeva, S.; Nikolov, Y. M.; Petrov, B.; Bachev, R.; Latev, G. Y.; Popov, V. A. and 5 co-authors	Observations and light curve solutions of the W UMa binaries V796 Cep, V797 Cep, CSS J015341.9+381641 and NSVS 3853195 Kjurkchieva, D. P.; Popov, V. A.; Ibryamov, S. I.; Vasileva, D. L.; Petrov, N. I.	The newly discovered eclipsing cataclysmic star 2MASS J16211735 + 4412541 and its peculiarity Diana P. Kjurkchieva, Velimir A. Popov, Doroteya L. Vasileva, Nikola I. Petrov	Return of the King: Time-Series Photometry of FO Aquarii's Initial Recovery from its Unprecedented 2016 Low State Colin Littlefield, Peter Garnavich, ... Velimir Popov, and 27 co-authors
Observations and Light Curve Solutions of the Eclipsing Binaries USNO-B1.0 1395-0370184 and USNO-B1.0 1395-0370731 Kjurkchieva, D.; Popov, V. A.; Vasileva, D.; Petrov, N.	Photometric observations and light curve solutions of the W UMa stars NSVS 2244206, NSVS 908513, CSS J004004.7+385531 and VSX J062624.4+570907 D. Kjurkchieva, V. A. Popov, D. Vasileva, N. Petrov	Observations and light curve solutions of four ultrashort-period binaries Kjurkchieva D., Popov V., Vasileva D., Petrov N	Light curve solutions of six short-period binaries and peculiarities of two of them, NSVS 3640326 and V1007 Cas D.Kjurkchieva, V.Popov, N.Petrov and E. Ivanov	Observations of transits of the southern exoplanets WASP 4b and WASP 46b by using a 40 cm telesope D.Kjurkchieva, N.Petrov, V.Popov, and E. Ivanov	The ATLAS3D project – XXIX. The new look of early-type galaxies and surrounding fields disclosed by extremely deep optical images. (ACKNOWLEDGEMENT for our image of NGC 474 galaxy shown in Fig. 7)
VARIABLE STARS - PHOTOMETRY - SOME EXAMPLES

					CTA 102 (BLLac type)

V2551 Cyg (HADS)	CSS J075205.6+381909	NSVS 691550	NSVS 7377875	NSVS 2459652	CSS J071813.2+505000

NSVS 7178717	EF Aql - symbiotic star	CSS J015341.9+381641	NSVS 3853195	V0797 Cep	V0796 Cep

2MASS J16211735 + 4412541 (catacl. var.)	FO Aqr (Cataclysmic var., intermediate polar)	USNO-B1.0 1395-0370184	USNO-B1.0 1395-0370731	VSX J062624.4+570907	NSVS 3676488 (CSS J004004.7+385531)

NSVS 908513	NSVS 2244206	CSS J224326.0+154532	CSS J214633.8+120016	CSS J171508.5+350658	CSS J171410.0+445850

V0568 Peg (Peg)	NSVS 113026 (Cep)	UCAC4 525-135123 (Del)	NSVS 1776195 (Per)	V1007 Cas (Cas)	NSVS 3640326 (And)

NGC3191 and SN2017egm	GK Per (Per)	Bright nova in Delphinus: PNV J20233073+2046041	SN 2014L - type Ic in M99 (NGC4254)	SN 2014J - type Ia in M82 (NGC3034)	Super Nova type II in M74
EXOPLANETS - PHOTOMETRY - SOME EXAMPLES

				Exoplanet WASP-46b (Ind)	Exoplanet WASP-4 b (Phe)

Exoplanet KOI 1459 b (Lyr)	Exoplanet HAT-P-32b (And)	Exoplanet WASP-52 b (Peg)	Exoplanet HAT-P-18b (Her)	Exoplanet HAT-P-37b (Dra)	Exoplanet WASP-36 b (Hya)
SPECTROSCOPY - SOME EXAMPLES

		NSVS 2569022	FM Com	EV Lac	C2014 Q2 (Lovejoy)
COMETS & ASTEROIDS - SOME EXAMPLES

41/P - 22.03.2017	C/2013 US10 - 18.12.2015	C/2013 US10 - 9.12.2015	C/2014 Q2- 15.01.2015	C/2014 Q2 - 15.01.2015	C/2014 Q2 - 11.01.2015
AAVSO CERTIFICATES

e-mail: info@irida-observatory.org