Astronomical Limiting Magnitude at Langkawi Observatory

Zainuddin, Mohd Zambri; Loon, Chin Wei; Harun, Saedah; Yahya, A. K.; Alam, Shah

doi:10.1063/1.3469724

Cited by 3 publications

(4 citation statements)

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“…Our measured limiting magnitudes and night sky brightness were summarized in Table 2 and Figure 4, respectively. It is worth to point out that our results are not in disagreement with [6] -in fact both of the measurements on V-band night sky brightness are in good agreement. For the V-band limiting magnitudes, [6] inferred the limiting magnitude based on their sky brightness measurements using different telescope and instrument, while in our work we applied the 5σ detection method.…”

Section: Resultssupporting

confidence: 69%

“…It is worth to point out that our results are not in disagreement with [6] -in fact both of the measurements on V-band night sky brightness are in good agreement. For the V-band limiting magnitudes, [6] inferred the limiting magnitude based on their sky brightness measurements using different telescope and instrument, while in our work we applied the 5σ detection method. Therefore, these different approaches could be the main reason behind a ~2 mag difference in the measured V-band limiting magnitudes.…”

Section: Resultssupporting

confidence: 69%

“…For example, a celestial object with an apparent magnitude fainter than the limiting magnitude is impossible to be observed. A limiting magnitude of V=18.6±1.0 mag, inferred from the night sky brightness, has been measured at LNO in the past [6]. However, this measurement was done using a different combination of the telescope and detector -the Meade LX200GPS 8-inch SchmidtCassegrain telescope and a SBIG STV camera.…”

Section: Introductionmentioning

confidence: 99%

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Limiting magnitudes and night sky brightness at the Langkawi National Observatory based on observations of standard stars

Ngeow

Luo

2017

J. Phys.: Conf. Ser.

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Abstract. We present the estimation of limiting magnitudes and night sky brightness at the Langkawi National Observatory with observations of selected standard stars. We first derived the transformation equations using the standard stars in our CCD images, followed by photometric calibration of the 2MASS point sources located in these images. Based on the calibrated magnitudes, we estimated a limiting magnitude of V=16.6±0.1 mag can be reached with a 60 second exposure time. For the night sky brightness, our measurements give V sky =19.0±0.1 mag arc-second -2 at the zenith direction. Our results can be used for planning the night time observations at the Langkawi National Observatory.

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Section: Resultssupporting

confidence: 69%

Section: Resultssupporting

confidence: 69%

Section: Introductionmentioning

confidence: 99%

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Limiting magnitudes and night sky brightness at the Langkawi National Observatory based on observations of standard stars

Ngeow

Luo

2017

J. Phys.: Conf. Ser.

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“…1' with a pixel scale of 1.2" per pixel 5 . Due to the median seeing for the LNO (at best 0.8 arcseconds in May 2014) and the local sky brightness (V = 18.6 ± 1.0 magnitude), the LNO is a suitable location for astronomical spectroscopic work 6 .…”

Section: The Malaysia Space Agency and The Langkawi National Observatorymentioning

confidence: 99%

Expanding astronomy research in Malaysia

2020

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Zenithal Sky Brightness Measurement at Selangor Observatory

Ngadiman

Shariff

Hamidi

2021

J. Phys.: Conf. Ser.

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The first continuous assessment of night sky brightness (NSB) at Selangor Observatory are presented. The brightness at night sky was monitored over 6 months in 2018, using portable light sensor called the Sky Quality Meter-type USB-Data Logging with a fixed position - pointing towards zenith. From the 179 records of night, the study shows that the average NSB readings at Selangor Observatory is 20.04 ± 0.18 magnitude per square arc second (MPSAS), after excluding the moonlight factor. Meanwhile, during the stable night sky conditions, the most recorded NSB value is 21.1 MPSAS with 0.78 MPSAS range and 21.03 MPSAS in average. Therefore, Selangor Observatory is still a relevant location for the implementation of astronomical work since it has a night sky within Bortle scale Class 4 to 5.

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Astronomical Limiting Magnitude at Langkawi Observatory

Cited by 3 publications

References 0 publications

Limiting magnitudes and night sky brightness at the Langkawi National Observatory based on observations of standard stars

Limiting magnitudes and night sky brightness at the Langkawi National Observatory based on observations of standard stars

Expanding astronomy research in Malaysia

Zenithal Sky Brightness Measurement at Selangor Observatory

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