Low-frequency, Wideband Study of an Active Repeater, FRB 20240114A, with the GMRT
We report the detection of 167 bursts from an active repeater, FRB 20240114A, using the upgraded Giant Metrewave Radio Telescope. The observations were carried out over a frequency range of 300–750 MHz, and on four different dates over a period of 6 months. Our analysis indicates that the fast radio...
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2025-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/adeb74 |
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| author | U. Panda J. Roy S. Bhattacharyya C. Dudeja S. Kudale |
| author_facet | U. Panda J. Roy S. Bhattacharyya C. Dudeja S. Kudale |
| author_sort | U. Panda |
| collection | DOAJ |
| description | We report the detection of 167 bursts from an active repeater, FRB 20240114A, using the upgraded Giant Metrewave Radio Telescope. The observations were carried out over a frequency range of 300–750 MHz, and on four different dates over a period of 6 months. Our analysis indicates that the fast radio bursts' emission properties are evolving, with both the median flux and emission rate of the bursts decreasing over time. The properties of the bursts also vary widely, with a wide range of intrinsic widths (0.246–39.364 ms), scattering timescales (0.004–28.289 ms), dispersion measures (524.07–533.56 pc cm ^−3 ), and band occupancies (9–180 MHz). The distribution for the waiting time, t _wait , is bimodal, and follows a Weibull distribution, with a shape parameter k = 0.33; however, when the two distributions are fit separately, they follow a Weibull distribution with k = 0.63 for t _wait < 1 s, and a log-normal distribution with a width of σ = 1.28 for t _wait > 1 s. The isotropic energy distribution is seen to follow a log-normal distribution as well, with a width of σ = 0.83. |
| format | Article |
| id | doaj-art-eba18493731e4f09a242b40f0ce63e1f |
| institution | Kabale University |
| issn | 1538-4357 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
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| series | The Astrophysical Journal |
| spelling | doaj-art-eba18493731e4f09a242b40f0ce63e1f2025-08-20T03:58:19ZengIOP PublishingThe Astrophysical Journal1538-43572025-01-0198911510.3847/1538-4357/adeb74Low-frequency, Wideband Study of an Active Repeater, FRB 20240114A, with the GMRTU. Panda0https://orcid.org/0000-0002-2441-4174J. Roy1https://orcid.org/0000-0002-2892-8025S. Bhattacharyya2https://orcid.org/0000-0003-0669-873XC. Dudeja3https://orcid.org/0009-0005-4130-892XS. Kudale4https://orcid.org/0000-0002-6631-1077National Centre for Radio Astrophysics, Tata Institute of Fundamental Research , Pune, Maharashtra, 411007, India ; ujjwalpanda97@gmail.comNational Centre for Radio Astrophysics, Tata Institute of Fundamental Research , Pune, Maharashtra, 411007, India ; ujjwalpanda97@gmail.comNational Centre for Radio Astrophysics, Tata Institute of Fundamental Research , Pune, Maharashtra, 411007, India ; ujjwalpanda97@gmail.comNational Centre for Radio Astrophysics, Tata Institute of Fundamental Research , Pune, Maharashtra, 411007, India ; ujjwalpanda97@gmail.comNational Centre for Radio Astrophysics, Tata Institute of Fundamental Research , Pune, Maharashtra, 411007, India ; ujjwalpanda97@gmail.comWe report the detection of 167 bursts from an active repeater, FRB 20240114A, using the upgraded Giant Metrewave Radio Telescope. The observations were carried out over a frequency range of 300–750 MHz, and on four different dates over a period of 6 months. Our analysis indicates that the fast radio bursts' emission properties are evolving, with both the median flux and emission rate of the bursts decreasing over time. The properties of the bursts also vary widely, with a wide range of intrinsic widths (0.246–39.364 ms), scattering timescales (0.004–28.289 ms), dispersion measures (524.07–533.56 pc cm ^−3 ), and band occupancies (9–180 MHz). The distribution for the waiting time, t _wait , is bimodal, and follows a Weibull distribution, with a shape parameter k = 0.33; however, when the two distributions are fit separately, they follow a Weibull distribution with k = 0.63 for t _wait < 1 s, and a log-normal distribution with a width of σ = 1.28 for t _wait > 1 s. The isotropic energy distribution is seen to follow a log-normal distribution as well, with a width of σ = 0.83.https://doi.org/10.3847/1538-4357/adeb74Radio astronomyRadio transient sourcesTransient sourcesRadio bursts |
| spellingShingle | U. Panda J. Roy S. Bhattacharyya C. Dudeja S. Kudale Low-frequency, Wideband Study of an Active Repeater, FRB 20240114A, with the GMRT The Astrophysical Journal Radio astronomy Radio transient sources Transient sources Radio bursts |
| title | Low-frequency, Wideband Study of an Active Repeater, FRB 20240114A, with the GMRT |
| title_full | Low-frequency, Wideband Study of an Active Repeater, FRB 20240114A, with the GMRT |
| title_fullStr | Low-frequency, Wideband Study of an Active Repeater, FRB 20240114A, with the GMRT |
| title_full_unstemmed | Low-frequency, Wideband Study of an Active Repeater, FRB 20240114A, with the GMRT |
| title_short | Low-frequency, Wideband Study of an Active Repeater, FRB 20240114A, with the GMRT |
| title_sort | low frequency wideband study of an active repeater frb 20240114a with the gmrt |
| topic | Radio astronomy Radio transient sources Transient sources Radio bursts |
| url | https://doi.org/10.3847/1538-4357/adeb74 |
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