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A jettisoned black hole discovered?

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Washington: Researchers analysing decades of observations from NASA’s Swift satellite have discovered an unusual source of light in a galaxy some 90 million light-years away.

The object’s curious properties make it a good match for a supermassive black hole ejected from its home galaxy after merging with another giant black hole, the US space agency said in a statement.

But astronomers cannot yet rule out an alternative possibility.

The source, called SDSS1133, may be the remnant of a massive star that erupted for a record period of time before destroying itself in a supernova explosion.

“One exciting discovery is that the brightness of SDSS1133 has changed little in optical or ultraviolet light for a decade which is not something typically seen in a young supernova remnant,” explained lead researcher Michael Koss, an astronomer at ETH Zurich (Swiss Federal Institute of Technology).

The source has brightened significantly in visible light during the past six months, a trend that, if maintained, would bolster the black hole interpretation.

“We suspect we are seeing the aftermath of a merger of two small galaxies and their central black holes,” said co-author Laura Blecha, an Einstein Fellow in the University of Maryland’s Department of Astronomy.

If SDSS1133 is not a black hole, then it might have been a very unusual type of star known as a Luminous Blue Variable (LBV).

These massive stars undergo episodic eruptions that cast large amounts of mass into space long before they explode.

Interpreted in this way, SDSS1133 would represent the longest period of LBV eruptions ever observed, followed by a terminal supernova explosion whose light reached Earth in 2001.

To analyse the object in greater detail, the team is planning ultraviolet observations with the Cosmic Origins Spectrograph aboard the Hubble Space Telescope in October 2015.
The study was published in the journal Monthly Notices of the Royal Astronomical Society.

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Lockdowns in China Force Urban Communities to Defy Censorship and Vent Frustration Online

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Anyip Mobile Proxies

Shanghai’s rich middle class is leading a wave of online dissent over the strict and prolonged lockdowns imposed in various parts of the country. Chinese internet censorship is struggling as patience is wearing thin in many urban centers, coming up with creative forms of online protests.

Social Media Posts Revealing Lockdown Tension in Shanghai

Drawn-out lockdowns are nothing new in China as authorities insist with the nation’s zero-Covid policy since the start of the pandemic. Currently over This time around, however, metropolitan areas like Shanghai are increasingly difficult to keep quiet, given that its more than 25 million residents have seen weeks of total isolation along with food shortages and many other service interruptions.

Dozens of towns and reportedly over 300 million Chinese citizens have been affected by lockdowns of different severity. As expected, urban netizens have been most outspoken over their difficulties by finding creative ways to get around state censorship and bans placed on topics, news comments and spontaneous campaigns.

Shanghai residents have been using mobile proxies and hijacking seemingly unrelated hashtags to talk about healthcare issues, delivery failures and the overall severity of their situation. The “positive energy” that the Chinese government wants to transmit during the recent prolonged series of lockdowns does not come naturally to those counting food supplies and online censors are working hard to filter words, trending topics and undesired social media sharing.

WeChat groups and message threads are under constant monitoring. Posts questioning the zero-Covid approach have been quickly deleted, including by leading Chinese health experts like Dr. Zhong Nanshan. Video footage is soon censored and protests and investigations are quickly made to disappear.

Where this has not worked, officials have exposed banners with warnings and outright threats like “watch your own mouth or face punishment”, while drones have been patrolling the city skies. Yet, if anything, this has led to further tensions and unspoken confrontation with Shanghai’s educated and affluent middle class.

Creative Online Solutions Harnessing Civic Energy

Announcements by Chinese social media that they would be publishing the IP addresses of users who “spread rumors” have not helped either. Tech industry research has shown that much of Asia’s tech-savvy population has a habit of using mobile proxies and other privacy tools, quickly finding workarounds to browse the internet freely and talk to the world about the hottest topics.

The sheer volume of forbidden posts is already a challenge for the very censorship system, experts explain. Unable to track all trending hashtags, state workers overlook topics that speak about the US, Ukraine or other popular news. Linking human rights elsewhere to their situation, Chinese online dissidents establish their informal channels and “hijack” the conversation to share personal or publicly relevant information about the Covid suppression in their town.

Sarcastic and satirical posts still dominate. Others hope to evade the censors by replacing words from famous poems or the national anthem. One thing is certain – social media, when harnessed with the right creativity, has proven its ability to mount pressure on the government in even some of the most strictly controlled tech environments like China.

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