astrosource: automating optical astronomy measurement, calibration and analysis for variable stellar sources from provided photometry

Fitzgerald, Michael T.; Gomez, Edward; Salimpour, Saeed; Singleton, Joe; Wibowo, R. W.

doi:10.21105/joss.02641

Cited by 7 publications

(4 citation statements)

References 19 publications

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“…After the observations were completed, the data was processed through a Python code program called Astrosource which was provided by Our Solar Siblings (Fitzgerald, Gomez, Salimpour, Singleton, & Wibowo, 2021). Each color filter was run individually through the five different scripts producing four sets of light curves.…”

Section: Methodsmentioning

confidence: 99%

Using Period-Luminosity-Metallicity relations to Calculate Distance for the RR Lyrae Star, EZ Lyr

Kidwell

Kidd

2021

ATOM

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Reliable methods to measure intergalactic distances are a valuable resource in the field of astronomy. Periodic variables stars, such as RR Lyraes, can be used as standard candles to determine the distance to the stellar structures where they are located. For this reason, many different student groups observed and analyzed RR Lyrae stars through a research course offered by Our Solar Siblings, and the focus of this particular study was the star EZ Lyr. Images of EZ Lyr were taken by Las Cumbres Observatory and processed using tools provided for the research course. Light curves were produced in B, V, sdss-i and sdss-z filters that were analyzed to determine the star’s period and luminosity. The period-luminosity-metallicity relations described in Caceres and Catelan (2008) were used to calculate the distance to EZ Lyr in each filter. The final distance measurement, 1406±32pc was slightly closer (~100 pc) compared to results from the GAIA satellite.

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Section: Methodsmentioning

confidence: 99%

Using Period-Luminosity-Metallicity relations to Calculate Distance for the RR Lyrae Star, EZ Lyr

Kidwell

Kidd

2021

ATOM

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“…This type of photometry assigns a function to the pixels that make up a star and calculates the total light under the function. The photometry catalogues produced by the OSS Pipeline cleans are ready to be used with Astrosource (Fitzgerald, Gomez, Salimpour, Singleton, & Wibowo, 2021). Astrosource was used along with Spyder (via Python Anaconda) to analyze the data on DM And's period as well as plotting the graphs and light curves using the images captured by the telescope, which are provided in the results section.…”

Section: Observations and Methodsmentioning

confidence: 99%

New distance estimates to Pulsating RR Lyrae Star DM And.

Frazier

O'Kuma

2021

ATOM

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This is a study of the photometric data of the RR Lyrae star, DM And, in the B, V, sdssi, and sdss-z filters. The light curve shapes and estimated period 0.631± 0.011d in the B-filter, 0.631± 0.012d in the V-filter, 0.631± 0.011d in the sdss-i filter, 0.631± 0.011d in the sdss-z filter, and an average period of 0.6301 0.011d represent that of a typical RRab type RR Lyrae star. DM And’s magnitude is 12.175± 0.010 in B, 11.70± 0.010 in V, 11.60± 0.03 in sdss-i and 11.475± 0.046 in sdss-z, with an average magnitude of 11.738± 0.024. DM And has a measured distance averaged over all filters of 1647± 42 pc, 1558± 46 pc in V, 1728± 77 pc in sdss-i, and 1653± 95 pc in sdss-z. These results are comparable to GAIA’s measured distance of 1572± 157 pc.

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“…OSS performs basic processing such as flat-fielding and cosmic ray removal. These data were then input to the astrosource software which processed the photometry of the target and comparison stars (see Fitzgerald, 2018, andFitzgerald et al, 2021, for further details on this software). astrosource 1 has the following procedure:…”

Section: Methodsmentioning

confidence: 99%

Distances for the RR Lyrae stars UU Ceti, UW Gruis, & W Tucanae

Parker¹,

Parker²,

Parker³

et al. 2021

Preprint

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B, V , i, and z bandpass observations were collected in late 2020 for three RRab type stars: UU Ceti, UW Gruis, and W Tucanae. The period-luminosity (PL) relationships of Catalen et al. (2004) and Caceres & Catelan (2008) were applied to derive distances. These were found to be in reasonable agreement with the Gaia Early DR3 distances, lending confidence to use of the PL relationships. Fourier decompositions were applied to data from the TESS space telescope to derive, using stepwise linear regression, an empirical relationship between terms of the decomposition and the pulsation period with metallicity [Fe/H]. TESS data were available for UU Cet and W Tuc out of the three studied stars. The derived equation gave metallicities in line with the literature for both stars, lending confidence to their usage in the PL-derived distances.

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astrosource: automating optical astronomy measurement, calibration and analysis for variable stellar sources from provided photometry

Cited by 7 publications

References 19 publications

Using Period-Luminosity-Metallicity relations to Calculate Distance for the RR Lyrae Star, EZ Lyr

Using Period-Luminosity-Metallicity relations to Calculate Distance for the RR Lyrae Star, EZ Lyr

New distance estimates to Pulsating RR Lyrae Star DM And.

Distances for the RR Lyrae stars UU Ceti, UW Gruis, & W Tucanae

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