2021JAVSO..49..232S

Query : 2021JAVSO..49..232S

2021JAVSO..49..232S - J. Am. Assoc. Variable star obs., 49, 232 (2021)

Photometric Observations of the Dwarf Nova AH Herculis.

SPOGLI C., ROCCHI G., CIPRINI S., VERGARI D. and ROSATI J.

Abstract (from CDS):

We present the results of 274 nights of observations of the dwarf nova AH Herculis made in the years 2012, 2014, 2017, and 2018 for a total of 725 photometric data points. Observations were made in the B, V, Rc, and Ic Johnson-Cousins photometric bands. In 2012 AH Her was observed for 49 nights, in 2014 for 21 nights, and in 2017 and 2018 for 102 nights each year. Overall, we obtained 186 data points with the photometric filter B, 270 observations with the V filter, 165 with the Rc filter, and 104 with the Ic filter. The variable was well sampled in 2017 and 2018 and was observed on almost all clear nights; comments are missing in some filters due to technical problems with the filter wheel. The observations were all made at Gianni Rocchi's private observatory. In 2017 and 2018 we observed several outbursts of AH Her and in 2017 a standstill of short duration. In this work we present the observational data, the light curves obtained in 2012, 2017, and 2018, a study of the color indices, and the temporal characteristics of the outbursts of this dwarf nova.

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Journal keyword(s):

Status at CDS : Objects in title, abstract, text, figures, and all or part of small table(s) being processed in SIMBAD.

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 V* AH Her CV* 16 44 10.0057431264 +25 15 01.942541352   12.44 12.71     K7V 249 0

Query : 2021JAVSO..49..232S

Basic data :
V* AH Her -- Cataclysmic Binary
Other object types: otypes_help 		* (2022AJ,AP,...), V* (AN,ROTSE1,...), X (2E,1RXS), Ce* (2000AJ), CV* (2020MNRAS), SB* (SBC9), V*? (SV*), UV (PG), NIR (2MASS), Opt (SDSS)
ICRS coord. (ep=J2000) : 		16 44 10.0057431264 +25 15 01.942541352 (Optical) [ 0.0104 0.0133 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		16 42 06.0595956219 +25 20 31.534004981 [ 0.0104 0.0133 90 ]
Gal coord. (ep=J2000) : 		044.8504052460486 +38.2357147235084 [ 0.0104 0.0133 90 ]
Proper motions mas/yr : 		-4.160 4.124 [0.015 0.019 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) -16.0 [~] / z(~) -0.000053 [~] / cz -16.00 [~]
   E 1995A&AS..114..269D
Parallaxes (mas): 		3.0169 [0.0179] A 2020yCat.1350....0G
Spectral type: 		K7V C 2002MNRAS.337.1215N
Fluxes (11) :
B 12.44 [0.11] D 2000A&A...355L..27H
V 12.71 [0.15] D 2000A&A...355L..27H
G 13.255997 [0.034207] C 2022yCat.1355....0G
J 11.806 [0.021] C 2003yCat.2246....0C
H 11.474 [0.017] C 2003yCat.2246....0C
K 11.375 [0.025] C 2003yCat.2246....0C
u (AB) 14.247 [0.006] C 2012ApJS..203...21A
g (AB) 15.225 [0.010] C 2012ApJS..203...21A
r (AB) 14.655 [0.010] C 2012ApJS..203...21A
i (AB) 12.383 [0.001] C 2012ApJS..203...21A
z (AB) 13.415 [0.007] C 2012ApJS..203...21A
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Identifiers (20) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

SV* SVS 32 2MASS J16441001+2515019 SDSS J164410.00+251501.9 [M96a] AH Her star 3
AN 20.1923 PG 1642+253 TIC 236005060 AAVSO 1640+25
AP J16441001+2515019 ROTSE1 J164409.33+251503.7 TYC 2049-1115-1 Gaia DR3 1300273349974628864
2E 3756 1RXS J164409.3+251528 V* AH Her Gaia DR1 1300273345678411520
2E 1642.1+2520 SBC9 918 WEB 13837 Gaia DR2 1300273349974628864

References (249 between 1850 and 2026) (Total 249)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements Description of Measurements

Velocities : 1    Distance : 3    Var : 1    Fe/H : 1    Plx : 3    PM : 2    SpT : 1   

   

Observing logs
IUE : 18   

   

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : V* AH Her

Link by name to the catalogue in VizieR :

AP J16441001+2515019 2E 3756 2MASS J16441001+2515019 PG 1642+253 1RXS J164409.3+251528
SDSS J164410.00+251501.9 TYC 2049-1115-1 V* AH Her Gaia DR3 1300273349974628864 Gaia DR1 1300273345678411520
Gaia DR2 1300273349974628864

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