Observations of Radio Magnetars with the Deep Space Network

Pearlman, Aaron B.; Majid, Walid A.; Prince, Thomas A.

doi:10.1155/2019/6325183

Cited by 19 publications

(20 citation statements)

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“…In this Letter, we present results from a simultaneous observation of FRB121102 at 2.25 and 8.36 GHz with the NASA DSN 70 m telescope, DSS-43, and expand upon the initial results reported in Pearlman et al (2019b). The observation and data analysis procedures are described in Section 2.…”

Section: Introductionmentioning

confidence: 86%

“…The data processing procedures were similar to those described in previous single pulse studies of pulsars and magnetars with the DSN(e.g., Majid et al 2017;Pearlman et al 2018Pearlman et al , 2019a. In each data set, we corrected for the bandpass slope across the frequency band and masked bad channels corrupted by RFI, which were identified using the PSRCHIVE software package (Hotan et al 2004).…”

Section: Observation and Data Analysismentioning

confidence: 99%

“…Since the discovery of FRB121102, hundreds of bursts have been detected by the Arecibo telescope and other instruments(e.g., Gourdji et al 2019). Many of these detections were made at L-band(1-2 GHz), but FRB121102 has also been detected at a wide range of radio frequencies using various radio telescopes (e.g., with CHIME/FRB at 0.4-0.8 GHz, Josephy et al 2019; the Green Bank Telescope (GBT) at 1.6-2.4 GHz, Scholz et al 2016Scholz et al , 2017; the NASA Deep Space Network(DSN) 70 m radio telescope, DSS-43, at 2.25 GHz, Pearlman et al 2019b; the Very Large Array(VLA) at 2.5-3.5 GHz, Chatterjee et al 2017;Law et al 2017; the Arecibo telescope at 4.1-4.9 GHz, Michilli et al 2018b; the Effelsberg 100 m telescope at 4.6-5.1 GHz, Spitler et al 2018;and the GBT at 4-8 GHz, Gajjar et al 2018;Zhang et al 2018).…”

Section: Introductionmentioning

confidence: 99%

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A Dual-band Radio Observation of FRB 121102 with the Deep Space Network and the Detection of Multiple Bursts

Majid

Pearlman

Nimmo

et al. 2020

ApJL

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The spectra of repeating fast radio bursts(FRBs) are complex and time-variable, sometimes peaking within the observing band and showing a fractional emission bandwidth of about 10%-30%. These spectral features may provide insight into the emission mechanism of repeating FRBs, or they could possibly be explained by extrinsic propagation effects in the local environment. Broadband observations can better quantify this behavior and help to distinguish between intrinsic and extrinsic effects. We present results from a simultaneous 2.25 and 8.36 GHz observation of the repeating FRB121102 using the 70 m Deep Space Network radio telescope, DSS-43. During the 5.7 hr continuous observing session, we detected six bursts from FRB121102, which were visible in the 2.25 GHz frequency band. However, none of these bursts were detected in the 8.36 GHz band, despite the larger bandwidth and greater sensitivity in the higher-frequency band. This effect is not explainable by Galactic scintillation and, along with previous multi-band experiments, clearly demonstrates that apparent burst activity depends strongly on the radio frequency band that is being observed.

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Section: Introductionmentioning

confidence: 86%

Section: Observation and Data Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Dual-band Radio Observation of FRB 121102 with the Deep Space Network and the Detection of Multiple Bursts

Majid

Pearlman

Nimmo

et al. 2020

ApJL

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“…We then corrected the T sys values for elevation effects, which were minimal since all of our observations occurred when the source elevation was above 20°. The data processing procedures followed those described in previous DSN studies of pulsars (e.g., Majid et al 2017;Pearlman et al 2018Pearlman et al , 2019. In each data set, we corrected for the bandpass slope across the frequency band.…”

Section: Deep Space Networkmentioning

confidence: 99%

Simultaneous X-Ray and Radio Observations of the Repeating Fast Radio Burst FRB ∼ 180916.J0158+65

Scholz

Cook

Cruces

et al. 2020

ApJ

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We report on simultaneous radio and X-ray observations of the repeating fast radio burst source FRB180916. J0158+65 using the Canadian Hydrogen Intensity Mapping Experiment (CHIME), Effelsberg, and Deep Space Network (DSS-14 and DSS-63) radio telescopes and the Chandra X-ray Observatory. During 33 ks of Chandra observations, we detect no radio bursts in overlapping Effelsberg or Deep Space Network observations and a single burst during CHIME/FRB source transits. We detect no X-ray events in excess of the background during the Chandra observations. These non-detections imply a 5σ limit of <5×10 −10 erg cm −2 for the 0.5-10 keV fluence of prompt emission at the time of the radio burst and 1.3×10 −9 erg cm −2 at any time during the Chandra observations. Given the host-galaxy redshift of FRB180916.J0158+65 (z∼0.034), these correspond to energy limits of <1.6×10 45 erg and <4×10 45 erg, respectively. We also place a 5σ limit of <8×10 −15 erg s −1 cm −2 on the 0.5-10 keV absorbed flux of a persistent source at the location of FRB180916.J0158+65. This corresponds to a luminosity limit of <2×10 40 erg s −1. Using an archival set of radio bursts from FRB180916.J0158+65, we search for prompt gamma-ray emission in Fermi/GBM data but find no significant gamma-ray bursts, thereby placing a limit of 9×10 −9 erg cm −2 on the 10-100 keV fluence. We also search Fermi/LAT data for periodic modulation of the gamma-ray brightness at the 16.35 days period of radio burst activity and detect no significant modulation. We compare these deep limits to the predictions of various fast radio burst models, but conclude that similar X-ray constraints on a closer fast radio burst source would be needed to strongly constrain theory.

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“…As a result, the broadband spectral behavior of most FRBs remains largely unexplored at high frequencies since precise sky positions are generally needed for follow-up high-frequency radio observations. The precise localization of FRB121102 to a host galaxy (Chatterjee et al 2017;Marcote et al 2017;Tendulkar et al 2017) subsequently enabled the detection of numerous radio bursts up to ∼8 GHz(e.g., see Law et al 2017;Scholz et al 2017a;Gajjar et al 2018;Michilli et al 2018;Spitler et al 2018;Zhang et al 2018;Gourdji et al 2019;Houben et al 2019;Pearlman et al 2019b;Majid et al 2020). These observations revealed that FRB121102 emits narrowband bursts, with fractional emission bandwidths of ∼10-30%, across a wide range of radio frequencies.…”

Section: Introductionmentioning

confidence: 99%

Multiwavelength Radio Observations of Two Repeating Fast Radio Burst Sources: FRB 121102 and FRB 180916.J0158+65

Pearlman

Majid

Prince

et al. 2020

ApJL

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The spectra of fast radio bursts (FRBs) encode valuable information about the source's local environment, underlying emission mechanism(s), and the intervening media along the line of sight. We present results from a long-term multiwavelength radio monitoring campaign of two repeating FRB sources, FRB121102 and FRB180916.J0158 +65, with the NASA Deep Space Network(DSN) 70 m radio telescopes (DSS-63 and DSS-14). The observations of FRB121102 were performed simultaneously at 2.3 and 8.4 GHz, and spanned a total of 27.3 hr between 2019September19 and 2020February11. We detected tworadio bursts in the 2.3 GHz frequency band from FRB121102, but no evidence of radio emission was found at 8.4 GHz during any of our observations. We observed FRB180916.J0158+65 simultaneously at 2.3 and 8.4 GHz, and also separately in the 1.5 GHz frequency band, for a total of 101.8 hr between 2019September19 and 2020May14. Our observations of FRB180916.J0158+65 spanned multiple activity cycles during which the source was known to be active and covered a wide range of activity phases. Several of our observations occurred during times when bursts were detected from the source between 400 and 800 MHz with the Canadian Hydrogen Intensity Mapping Experiment(CHIME) radio telescope. However, no radio bursts were detected from FRB180916.J0158+65 at any of the frequencies used during our observations with the DSNradio telescopes. We find that FRB180916.J0158+65ʼs apparent activity is strongly frequency-dependent due to the narrowband nature of its radio bursts, which have less spectral occupancy at high radio frequencies ( 2 GHz). We also find that fewer or fainter bursts are emitted from the source at high radio frequencies. We discuss the implications of these results for possible progenitor models of repeating FRBs.

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Observations of Radio Magnetars with the Deep Space Network

Cited by 19 publications

References 80 publications

A Dual-band Radio Observation of FRB 121102 with the Deep Space Network and the Detection of Multiple Bursts

A Dual-band Radio Observation of FRB 121102 with the Deep Space Network and the Detection of Multiple Bursts

Simultaneous X-Ray and Radio Observations of the Repeating Fast Radio Burst FRB ∼ 180916.J0158+65

Multiwavelength Radio Observations of Two Repeating Fast Radio Burst Sources: FRB 121102 and FRB 180916.J0158+65

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