A NUV Snapshot Survey of the Nearest Luminous AGN

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This article came to our attention via Space Telescope Live

This is a SNAP near UV survey (NUV, <3000 A) in the F225W fillter of the 124 nearest (z<0.1) and X-ray brightest AGN with black hole mass measurements from broad line Hbwith existing V or I-band HST imaging. These 100 pc resolution observations will resolve the power output of local AGN (point source emission in HST) and study the link of extended nuclear star formation with AGN activity. We will separate the point like AGN emission from the faint diffuse extended galaxy emission from SFR and measure it's flux. These HST observations will be complemented by approved Swift/XRT and Swift/UVOT observations for broadband simultaneous SED coverage. Our observing strategy is to: 1). Obtain a short 20s sub arrayed exposure, to avoid target saturation. The median brightness is 17 mag AB in GALEX/NUV, with some brighter, and we don't know actually how bright the nucleus is compared to the host galaxy. 2) Then obtain a longer exposure of 17.5 minutes total so that we can recover and measure the extended emission. We split the longer 3 expsoures into 350 seconds so the buffer dump can be put into the next exposure (need to be >349 s). We use 3 separate exposure for cosmic ray elimination and to sample the PSF. We targets at UVIS2 to take ...

Read More - Source: Space Telescope Live

freiherr-von-naarenburg:andthewholebusapplauded: scarabesque: t…

OLTA

This article came to our attention first via Cultural Offering



freiherr-von-naarenburg:
andthewholebusapplauded:
scarabesque:
the-davest-of-uncles:

millymollyme:

Really??

Not even trying to hide it anymore, are they? “Silence, Comrade! Your children belong to the State!”

https://news.yahoo.com/im-teacher-parents-stay-classroom-130400597.html

McAuliffe’s re...

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‘Banning Anonymous Social Media Accounts Would Only Stifle Free Speech and Democracy’

OLTA

This article came to our attention via Slashdot: Your Rights Online

Owen Jones, a British newspaper columnist and activist for the Labour Party, writes in an opinion piece for The Guardian: The aftermath of the horrific killing of Conservative MP David Amess should have been a moment for politicians and the public to unite in an effort to protect democracy. Instead,...

Read More - Source: Slashdot: Your Rights Online

Extratropical Cyclones Drench West Coast

OLTB

This article came to our attention first via NASA Earth Observatory Image of the Day

                    <a href="https://earthobservatory.nasa.gov/images/148999/extratropical-cyclones-drench-west-coast"><img src="https://eoimages.gsfc.nasa.gov/images/imagerecords/148000/148999/west_goes_2021298_th.jpg"
                                border="0" alt="Extratropical Cyclones Drench West Coast"/></a><br />
                    One of the most intense extratropical cyclones ever to strike the Pacific Northwest drew an equally historic amount of moisture onshore.
                <a href="https://earthobservatory.nasa.gov/images/148999/extratropical-cyclones-drench-west-coast">Read More...</a>

Read More - Source: NASA Earth Observatory Image of the Day