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We present the result of visual double stars speckle observation in 2012, using 24 inch (60 cm) refractor at the Bosscha Observatory. The objects selected for this observation are calibration candidates, their separations range from 1-7 arc second, and they are located in both northern and southern hemisphere. Seeing effect due to the Earth atmospheric turbulence limits the resolution of ground-based telescopes. Seeing over Bosscha Observatory is generally 1-2 arc second, imposing a limit on visual double star separation below which the system cannot be resolved by long exposure imaging (longer than ∼ 50 ms). Speckle interferometry method is used to resolve double stars with separation below typical size of seeing effect. Series of images are captured in fast short-time exposures (∼ 50 ms) using CCD camera. The result of our first experiment shows that our system can be used to measure separation of 1.8 arc second, with ∆m ≃ 1.Keywords: visual double star, atmospheric turbulence, seeing effect, speckle interferometry, southern hemisphere PACS: 95.75. Mn, 95.75.Kk, 95.85.Kr, 97.80.Di

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The goal of this study is to see how the VIP customer research object at Citylink Indonesia Airlines affects customer loyalty. So according research on the impact of customer experience on regular customers, patrons who receive a positive ” are more likely to return for another purchase, more likely to recommend the business to friends, and less inclined to shift to competitors. According to the findings of this study, customer experience management factors play an important role in business competitiveness. Emotional experiences, according to the literature, play an important role in customer loyalty to a company's brand. This finding is in accordance with the study's findings that airline image and service quality have a significant influence on customer behavioral intentions. Because a brand's experience includes a consumer's subjective experience and behavior, customer experience is related to customer loyalty. The airline's image, trust, and additional services all contribute to the overall expertise. Customers who have a happy impression and thus be willing to repurchase the service.

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