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J/AZh/77/420       Photopolarimetric activity of SV Cep     (Rostopchina+, 2000)

Photopolarimetric activity of the Ae Herbig star SV Cep. Rostopchina, A.N., Grinin, V.P., Shakhovskoy, D.N., The P.S., Minikulov N.Kh. <Astron. Zh. 77, 420 (2000)> =2000ARep...44..365R =2000AZh....77..420R
ADC_Keywords: Stars, pre-main sequence; Stars, variable; Photometry, UBVRI; Polarization Abstract: The results of the eleven-years (1987-98) photopolarimetric patrol observations of Herbig Ae star SV Cep are presented. Only one deep brightness minimum of star were observed during this time interval. The decrease of the SV Cep brightness during this minimum was accompanied by increase of its linear polarization. The similar behaviour of linear polarization with the brightness changes was found earlier in other young stars with the non-periodic Algol-type minima. The most probable interpretation of this phenomenon is based on the model in which the source of intrinsic linear polarization is the scattered radiation of circumstellar disk-like dust envelope (probably the proto-planetary disk). The deposition of this source increases during the brightness minima when the direct (non-polarized) stellar radiation are absorbed in the CS dust clouds intersected the line-of-sight. Object: --------------------------------------------------------------------- RA (2000) DE Designation --------------------------------------------------------------------- 22 21 33.6 +73 40 26 SV Cep = HD+72 1031 = HBC 736=JP11 238 --------------------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 138 466 SV Cep photometric and polarimetric UBVRI observations at CrAO.
See also: J/AZh/78/60 : Photometry and polarimetry of Ae star VV Ser (Rostopchina+ 2001) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 11 F11.3 d JDH [2446929/2451120] Julian date 13- 18 F6.3 mag Vmag V magnitude 20- 24 F5.3 mag U-B ? U-B color 26- 30 F5.3 mag B-V B-V color 32- 36 F5.3 mag V-R ? V-R color 38- 42 F5.3 mag V-I ? V-I color 44- 47 F4.2 % P(U) ? Degree of linear polarization in U band 49- 52 F4.2 % e_P(U) ? Mean error on P(U) 54- 58 F5.1 deg PA(U) ? Position angle of polarization in U band 60- 62 F3.1 deg e_PA(U) ? Mean error on PA(U) 64- 67 F4.2 % P(B) ? Degree of linear polarization in B band 69- 72 F4.2 % e_P(B) ? Mean error on P(B) 74- 77 F4.1 deg PA(B) ? Position angle of polarization in B band 79- 81 F3.1 deg e_PA(B) ? Mean error on PA(B) 83- 86 F4.2 % P(V) ? Degree of linear polarization in V band 88- 91 F4.2 % e_P(V) ? Mean error on P(V) 93- 96 F4.1 deg PA(V) ? Position angle of polarization in V band 98-100 F3.1 deg e_PA(V) ? Mean error on PA(V) 102-105 F4.2 % P(R) ? Degree of linear polarization in R band 107-110 F4.2 % e_P(R) ? Mean error on P(R) 112-115 F4.1 deg PA(R) ? Position angle of polarization in R band 117-119 F3.1 deg e_PA(R) ? Mean error on PA(R) 121-124 F4.2 % P(I) ? Degree of linear polarization in I band 126-129 F4.2 % e_P(I) ? Mean error on P(I) 131-134 F4.1 deg PA(I) ? Position angle of polarization in I band 136-138 F3.1 deg e_PA(I) ? Mean error on PA(I)
Table3: Polarimetry data of SV Cep neighbor stars ------------------------------------------------------ field star RA DE P(V) e_P(V) PA(V) e_PA(V) deg deg % % deg deg ------------------------------------------------------ a 22.3158 +73.7622 0.58 0.15 58.9 4.2 b 22.3583 +73.8589 0.64 0.08 35.5 3.5 f 22.3883 +73.9689 0.73 0.13 49.9 6.5 g 22.4089 +73.9170 0.61 0.14 61.1 6.9 j 22.4386 +73.8156 0.32 0.10 52.3 7.0 k 22.3183 +73.3867 1.02 0.12 34.3 3.6 l 22.3478 +73.4678 0.79 0.13 45.0 4.8 s 22.4069 +73.3633 2.50 0.23 44.1 2.8 t 22.4292 +73.5089 1.38 0.22 74.2 4.1 gamma 22.3608 +73.6511 1.01 0.12 50.5 3.5 ------------------------------------------------------
(End) Alla Rostopchina [CrAO], Veta Avedisova [INASAN] 22-March-2001
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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