1,721,180 research outputs found
Ground-based Light Curve Follow-up Validation observations of TESS object of interest TOI 5886.01
Full text link“Context. It is important to discover new systems with exoplanets because each new system shows a different aspect of the lifecycle of a solar system. Discovering new solar systems can also act as a way to confirm our understanding of the lifecycle and interactions between planets and stars. The launch of the TESS mission helped to identify thousands of possible exoplanets that need to be manually confirmed.
Aims. The goal of this study was to attempt to define the status of TOI 5886 as an exoplanet or as a false positive or false result.The goal was also to further research into exoplanets in order to make future studies of TOI 5996.01 more successful.
Methods. The George Mason 0.8m space telescope was used to observe TOi 5996.01 on the night of 6/18/24. AstroImageJ was later used to analyze the results and create a light curve and an NEB plot.
Results. Results of the analysis were inconclusive. Although the transit occurred during the predicted time and had a depth close to the predicted value no stars passed the NEB check which indicated that the result could be a false positive.
Ground-based Light Curve Follow-up Validation observations of TESS object of interest TOI 5147.01
Full text link“Exoplanet research is essential for understanding how planetary systems fit into our universe. Through the Transiting Exoplanet Survey Satellite (TESS) mission, many exoplanet candidates were found, but few have been confirmed. The purpose of this paper is to verify the existence of TESS Object of Interest (TOI) 5147.01 using the transit method. We took ground-based observations at George Mason University of the host star, TOI 5147, then created a light curve using AstroImageJ. A nearby eclipsing binary (NEB) check was conducted using AstroImageJ to analyze stars within a 2.5” of the host star. This is then followed by a Markov chain Monte Carlo (MCMC) analysis to calculate output parameters and their uncertainties. The AIJ lightcurve provides strong evidence for the existence of TOI 5147.01. However, there are still uncertainties for the transit timing and planet parameters for TOI 5147.01.
Ground-based Light Curve Follow-up Validation observations of TESS object of interest TOI 5585.01
Full text link“The Transiting Exoplanet Survey Satellite (TESS) mission is instrumental in discovering and characterizing exoplanets orbiting nearby stars. This study focuses on the follow-up observations of the exoplanet candidate TOI 5585.01, characterized by a radius of 8.05828 Earth radii and an orbital period of 1.8434549 days. Using data collected on March 14, 2024, from the GMU observatory telescope, this paper aims to determine whether a predicted transit of TOI 5585.01 occurs within the expected ingress and egress times. Observations included 35 science images and calibration data, analyzed through AstroImageJ and utilizing Alnitak for plate-solving. The results indicated that no reference stars passed the NEB check, and the majority of detected light was from TOI 5585.01. While the data showed fluctuations in the light curve and a potential depth of 8.61 ppt, the observations were inconclusive due to early data cutoff and limited coverage. Consequently, the study could not confirm a definitive transit event. Further observations are recommended to gather additional data and enhance the analysis, as current findings do not provide conclusive evidence of the transit.
Ground-based Light Curve Follow-up Validation observations of TESS object of interest TOI 5907.01
Full text link“The TESS mission, standing for the Transiting Exoplanet Survey Satellite, is a NASA guided mission that looks for potential exoplanets using the transit method. When the satellite sees a potential exoplanet, it does not immediately validate the presence of an exoplanet, instead turning it into one of TESS Objects of Interests (TOIs) and letting researchers conduct ground-based follow-up validations to confirm. Our research was conducted on TESS Object of Interest 5907.01. The goal was to investigate and confirm if a transit had occurred. Additionally, we wanted to confirm if our results matched the expected duration, depth, and transit start and end times predicted by TESS. Our initial results show that a very faint transit occurred. Additional work suggests that TOI 5907.01 likely is an exoplanet.
Ground-based Light Curve Follow-up Validation observations of TESS object of interest TOI 5907.01
No full text“The Transiting Exoplanet Survey Satellite (TESS) is designed to discover thousands of exoplanets in orbit around the brightest dwarf stars in the sky [1]. Possible exoplanet candidates are marked as Objects of Interest and selected for follow-up ground-based observation. The goal of this research study was to conduct further ground-based observations, analyze data, and further classify TESS Object of Interest (TOI) 5907.01 as an exoplanet. Our observations showed that the transit occurred with all the expected characteristics. This indicates that TOI 5907.01 is likely an actual exoplanet.
Ground-based Light Curve Follow-up Validation observations of TESS object of interest TOI 5868.01
Full text link“This study aimed to provide additional confirmation, details, and classification for TESS Object of Interest (TOI) 5868.01. After obtaining the observation data of TOI 5868.01 from George Mason University, we could generate a stellar light curve of this object using AstroImageJ. Upon producing this light curve, it is unclear if a transit is present. The data had an initial scatter percentage (RMS) of 2.263%. We discovered that by using detrending parameters like AIRMASS and Width_T1, the RMS dropped to 1.976%. This is still not perfect though. As a result, while suggestive, the study's results are not definitive. They suggest that the start might have had a transit, however due to the noise in the data, further analysis is recommended. There does seem to be some activity in between the ingress and egress, but the graph only starts to fluctuate or dip much after the predicted ingress has started. Though a definitive conclusion cannot be made just yet, additional information needs to be gathered and compared with the available data to validate TOI 5868.01 as a transit.
Ground-based Light Curve Follow-up Validation observations of TESS object of interest TOI 5868.01
Full text link“Our study aimed to examine and characterize data on Object of Interest 5868.01, an exoplanet detected by the Transiting Exoplanet Survey Satellite (TESS). This was done by analyzing the stellar light curve of this object. We remotely obtained ground based data from the Observatory at George Mason University(GMU). We took 280 exposures with the GMU 0.8 m telescope and reduced them using Python collaboratories, then we conducted ground based multi aperture photometry using AstroImageJ to generate a light curve. In addition, we plotted residuals and the fluxes of our target stars and adjusted trends within the data. Although our data was in some measure skewed due to low exposure and periods of imperfections from telescope movement and blurriness, we found that by using less obscured reference stars and the WIDTH_T1 Detrending Parameter, we were able to find data clear enough to work with. Therefore, the results for this study are inconclusive yet suggestive of a transit. Due to the limited scope of our research, we did not perform other detection methods such as Doppler spectroscopy or transit timing variations analysis. Though no confirmed conclusion can be reached at this time, more data should be collected to compare to the current data in order to fully confirm TOI 5868.01 as a transit.
Ground-based Light Curve Follow-up Validation observations of TESS object of interest TOI 6209.01
Full text link“The NASA TESS Mission aims to discover exoplanets and other astronomical entities outside of our solar system. TOI 6209.01 was identified as an exoplanet candidate in the NASA TESS Mission. This paper attempts to validate the existence of the exoplanet through analyzing an occurrence of a transit. We made this attempt through data collected and a generated light curve. Through the softwares AstroImageJ and the embedded Astrometry, we are able to create the light-curve, along with a dmagRNS plot. However, due to influxes in data, we were unable to provide a complete observation of the transit. We could not plate-solve several images, and so we removed them. After the analysis, we were unable to validate the existence of the exoplanet, but there is no evidence against the existence of the exoplanet. Further work is still required for a solid validation.
Ground-based Light Curve Follow-up Validation observations of TESS object of interest TOI 5944.01
Full text link“Exoplanets are planets that orbit stars external to the solar system. The Transiting Exoplanet Survey Satellite (TESS) is a space telescope designed by NASA’s Explorer program with the goal of detecting exoplanets using the transit method. Objects that are potential candidates for exoplanet status are nominally marked as “Transiting Exoplanet Survey Satellite Object of Interest” or “TOI” for short. In this observation, TOI 5944.01 was analyzed. A few characteristics are known about TOI 5944.01, including having an orbital period of 5.94 days and a radius of 11.945 Earth radii. 194 exposures were taken by the GMU 0.8 m telescope, and after reduction, ground-based multi-aperture photometry was conducted to generate a light curve. The associated transit was analyzed at a predicted time, star location, and potential depth. Based on the analysis, the results are inconclusive but suggest that TOI 5944.01 could potentially be an exoplanet. However, further analysis is necessary.
Ground-based Light Curve Follow-up Validation observations of TESS object of interest TOI 3521.01
No full text“This investigation aims to further confirm, characterize, and classify the Transiting Exoplanet Survey Satellite (TESS) Object of Interest (TOI) 3521.01 as a false positive or a valid exoplanet. Verifying the candidate is necessary due to sources of false positives, such as eclipsing binaries, sometimes posing as exoplanet candidates. To achieve this, we created a light curve by analyzing ground-based observations from George Mason University (GMU) in AstroImageJ (AIJ). The consistency of the light curve with the predicted ingress time, egress time, and depth suggests that the detection of TOI-3521.01 by the TESS mission is accurate. If it is a genuine exoplanet, it appears to be a hot Jupiter orbiting a star similar to our Sun. However, because we could not rule out the possibility that the detection was an eclipsing binary acting as a false positive, the results of this validation were ultimately inconclusive. After we confirm that TOI-3521.01 is an exoplanet, we should obtain the planet’s mass through Doppler spectroscopy to confirm its status as a hot Jupiter.
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