Asia Bibi was found guilty of insulting the prophet Muhammad four years ago after incident in June 2009

A Pakistani Christian woman sentenced to death for blasphemy has filed an appeal in the country’s top court , her final legal recourse after being found guilty of insulting the prophet Muhammad four years ago.

A high court in Lahore confirmed the death sentence of Asia Bibi last month, dashing hopes the conviction might be quashed or commuted to a jail term. She has been on death row since November 2010 after being convicted of blasphemy during an argument with a Muslim woman over a bowl of water.

“On behalf of Asia Bibi I have today filed an appeal in the supreme court,” her lawyer Saiful Malook said on Monday.

Malook said in the petition his client had asked the court to reconsider deficiencies in the case including allegedly manipulated evidence and a delay between the time of the incident and its investigation by police. He added that the blasphemy claim was concocted by Bibi’s enemies to target her and had no basis in fact.

“We expect an early hearing of the appeal and hope that the proceedings will be over in one year,” Malook said.

The allegations against Bibi date back to June 2009, when she was labouring in a field and a row broke out with some Muslim women she was working with. She was asked to fetch water, but the Muslim women objected, saying that as a non-Muslim she was unfit to touch the water bowl. A few days later the women went to a local cleric and put forward the blasphemy allegations.

Bibi’s husband has also written to Pakistan’s president, Mamnoon Hussain, to ask for her to be pardoned and allowed to move to France.

“We are convinced that Asia will only be saved from being hanged if the venerable President Hussain grants her a pardon. No one should be killed for drinking a glass of water,” Ashiq Masih wrote in an open letter dated 17 November. The mayor of Paris, Anne Hidalgo, has said the couple are welcome in the city.

Blasphemy is a hugely sensitive issue in the majority Muslim country, with even unproven allegations often prompting mob violence. Pakistan has never executed anyone for blasphemy and has had a de facto moratorium on civilian executions since 2008. But anyone convicted, or even just accused, of insulting Islam, risks death at the hands of vigilantes.