Sains Ma1aysiana 25(2): 17-25 (1996)                                                                                  Sains Fizis dan Gunaan/

                                                                                                                                             Physical and Applied Sciences

Penentuan Pekali Transformasi B dan V di Kawasan Bandaraya

(Determination of B and V transformation coefficients in city area)

Mohammad Ridwan Hidayat & Mazlan bt Othman

Bahagian Kajian Sains Angkasa

50480 Kuala Lumpur Malaysia

ABSTRAK

Kaedah fotometri pembezaan dengan menggunakan pasangan bintang merah biru dekat telah dipakai untuk memperoleh pekali transformasi e_B dan e_V Sistem fotometri yang digunakan adalah UBV Johnson-Morgan. Pencerapan adalah dilakukan di bandaraya (Kuala Lumpur) untuk menguji keberkesanan kaedah fotometri pembezaan. Untuk tujuan itu, nilai-nilai pekali pemupusan atomsfera peringkat kedua telah dibandingkan dengan nilai terdahulu. 

ABSTRACT

Extinction and transformation coefficients for Kuala Lumpur were obtained from differential photometry of close red-blue star pairs using Johnson ­Morgan UBV photometric system.

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