Detection of the magnetar XTE J1810-197 at 150 and 260 GHz with the NIKA2 Kinetic Inductance Detector camera

Abstract

The investigation of pulsars between millimetre and optical wavelengths is challenging due to the faintness of the pulsar signals and the relative low sensitivity of the available facilities compared to 100-m class telescopes operating in the centimetre band. The Kinetic Inductance Detector (KID) technology offers large instantaneous bandwidths and a high sensitivity that can help to substantially increase the ability of existing observatories at short wavelengths to detect pulsars and transient emission. To investigate the feasibility of detecting pulsars with KIDs, we observed the anomalous X-ray pulsar XTE J1810-197 with the New IRAM KIDs Array-2 (NIKA2) camera installed at the IRAM 30-m Telescope in Spain. We detected the pulsations from the pulsar with NIKA2 at its two operating frequency bands, 150 and 260 GHz ($\lambda$=2.0 and 1.15 mm, respectively). This is the first time that a pulsar is detected with a receiver based on KID technology in the millimetre band. In addition, this is the first report of short millimetre emission from XTE J1810-197 after its reactivation in December 2018, and it is the first time that the source is detected at 260 GHz, which gives us new insights into the radio emission process of the star.

arXiv comment5 pages, 3 figures, 1 table. Accepted in A&A Letters. This version includes corrections by editor

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• Multiwavelength Radio Observations of Two Repeating Fast Radio Burst Sources: FRB 121102 and FRB 180916.J0158+65
• Radio and X-ray observations of giant pulses from XTE J1810-197
• High-cadence observations and variable spin behaviour of magnetar Swift J1818.0-1607 after its outburst
• An 86-GHz search for Pulsars in the Galactic Center with the Atacama Large Millimeter/submillimeter Array
• Searching for pulsars in the Galactic Centre at 3 and 2 mm
• Pair Plasma in Super-QED Magnetic Fields and the Hard X-ray/Optical Emission of Magnetars
• Submillimeter pulsations from the magnetar XTE J1810-197
• Multi-frequency radio observations of the radio-loud magnetar XTE J1810-197
• High Frequency Radio Observations of Two Magnetars, PSR J1622$-$4950 and 1E 1547.0$-$5408
• Magnetar XTE J1810-197: Spectro-temporal evolution of average radio emission