![]() ![]() The magnetar XTE 1810-197’s radio pulse varied tremendously from day to day as it gradually faded. Deluxe Grand Lodge Magnetic Name Badge with Raised Metal Square & Compass Emblem. Normally radio pulsars have very stable pulse periods, or switch between a couple of different modes. Indeed this magnetar was visible all the way from radio to mm wavelengths and had a rapidly evolving pulse period. In 2006 astronomers discovered that the magnetar XTE J1810-197 was visible as a radio pulsar with an incredibly flat spectrum. If they remained active for an extended period of time, we should also see magnetars with pulse periods of tens of seconds or longer. However, it appears that magnetars are only X-ray bright for a short period of time since their pulse periods are clustered between 6 and 12 seconds. Since that time, both SGRs and anomalous X-ray pulsars have been explained successfully by the magnetar model, with the decay of the magnetic field powering the emission of X-rays and gamma rays. However, few considered it seriously until 6 years later when the detection of pulsations and the measurement of the spin-down rate of a SGR suggested that it was a neutron star with a magnetic field strength of 8 × 10 14 gauss. The idea of a magnetar was first proposed in 1987 and used to successfully explain soft gamma repeaters ( SGR) in 1992. It is not entirely clear what conditions cause a magnetar to be created instead of an ordinary neutron star or pulsar, but in order to achieve such strong magnetic fields, some theories suggest the neutron star must initially rotate between 100 and 1,000 times per second. They are formed in the same way as all neutron stars, through the core-collapse of a massive star in a supernova explosion. At ~10 15 gauss, the magnetic field is a thousand trillion times stronger than the Earth’s, and between 100 and 1,000 times stronger than that of a radio pulsar, making them the most magnetic objects known. No magnet needed.A magnetar (a contraction of magnetic star) is a neutron star with an ultra-strong magnetic field. After the MRI, he came back and reloaded the settings that he'd downloaded before. Though, in my recent MRI they had a PM tech download my settings then reprogram my PM to the "safe" mode. The reason for the magnetic sensor is for things like MRIs, to put it temporarily into a "safe" mode. It doesn't set the PM into its default mode (it couldn't and still do the tests). It's a near-field antenna used to communicate with the pacemaker. The "puck" they use during an interrogation is not a magnet. If the magnetic tag didn't have a keeper on the back side, it wouldn't be a problem either because it would be on the floor. In other words, once it's attached, there can't be a problem. There is only some leakage around the outside where the material separates the magnet and its keeper. Very little of the magnet's field is outside that pair. The name tag magnet sticks to a piece of metal (iron) on the back side of the clothing, right? That piece of metal acts a a "keeper". Any time I do something questionable, I ask at my next check and they always say it didn't do anything. My ipad has a magnetic cover and I read in bed with it on my chest. In 25 years of being paced, I've never once had this happen! I use my cell phone on the left side, wear a magnetic name tag at church, used to run with my ipod clipped over my pacer or now I run with my phone which I've been known to tuck in my bra if my pants don't have a pocket. Any time this happens, it shows up on the pacing report. Worst case, it'll put the pacer in test mode pacing at a flat rate until it's removed, then the pacer will go back to full function with no harm done. The puck that they use to interrogate at the doctor's office is a magnet. You can take it to a pacer check if you want to be sure, they can test to see if it can get the pacer in test mode. It's unlikely the name tag is actually strong enough to do anything but to be on the safe side wear it on the right side, or get one with a pin. ![]() The rule of thumb for anything questionable is 6" from the device. ![]()
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