SDSS & GALEX databases
description
Transcript of SDSS & GALEX databases
![Page 1: SDSS & GALEX databases](https://reader036.fdocuments.in/reader036/viewer/2022062309/5681592d550346895dc6588e/html5/thumbnails/1.jpg)
SDSS & GALEX databases
SDSS: http://www.sdss.org SkyServer
GALEX: http://galex.stsci.edu/GR4/ GALEXView
![Page 2: SDSS & GALEX databases](https://reader036.fdocuments.in/reader036/viewer/2022062309/5681592d550346895dc6588e/html5/thumbnails/2.jpg)
> 200 CVs so far
SDSS at APO
2.5m
3.5m
![Page 3: SDSS & GALEX databases](https://reader036.fdocuments.in/reader036/viewer/2022062309/5681592d550346895dc6588e/html5/thumbnails/3.jpg)
SDSS camera:
30 CCDs
5 filters:
u,g,r,i,z
![Page 4: SDSS & GALEX databases](https://reader036.fdocuments.in/reader036/viewer/2022062309/5681592d550346895dc6588e/html5/thumbnails/4.jpg)
QSO rejects Serendip Blue Cat_Var
![Page 5: SDSS & GALEX databases](https://reader036.fdocuments.in/reader036/viewer/2022062309/5681592d550346895dc6588e/html5/thumbnails/5.jpg)
SDSS fiber spectrograph
![Page 6: SDSS & GALEX databases](https://reader036.fdocuments.in/reader036/viewer/2022062309/5681592d550346895dc6588e/html5/thumbnails/6.jpg)
Typical CV spectra in DR1
CVs in DR1 in Szkody et al. 2003, AJ, 126, 1499
Strong lines
Strong continuum
Cyclotron humps
Shows WD ZZ Cet
Strong HeII Polar
Polar
![Page 7: SDSS & GALEX databases](https://reader036.fdocuments.in/reader036/viewer/2022062309/5681592d550346895dc6588e/html5/thumbnails/7.jpg)
Possibilities with SkyServer:
• have fun with scrolling sky
• find mags of star + field objects
• find what field stars are [spectra]
• make a finding chart
• compare psf mags, fiber mags and DSS, GSC to determine variability
![Page 8: SDSS & GALEX databases](https://reader036.fdocuments.in/reader036/viewer/2022062309/5681592d550346895dc6588e/html5/thumbnails/8.jpg)
Available Data:
• DR7: 8420 sq deg imaging, 230 million objects; 1656 spectral plates, 640 spectra on each plate
• Stripe 82: 2.5 deg on CE from 22h24m to 4h08m RA; imaged Sept-Nov in 2005-2007, some back to 2002, 5-60 measurements with median of 10 observations for each object
![Page 9: SDSS & GALEX databases](https://reader036.fdocuments.in/reader036/viewer/2022062309/5681592d550346895dc6588e/html5/thumbnails/9.jpg)
GALEX NUV (1750-2800A)
EF Eri
19.7in telescope with 1.2 deg diam FOV
![Page 10: SDSS & GALEX databases](https://reader036.fdocuments.in/reader036/viewer/2022062309/5681592d550346895dc6588e/html5/thumbnails/10.jpg)
GALEX
Szkody, Harrison, Plotkin, Howell, Seibert, Bianchi, Ap, 646, L147, 2006
1350-1750A
1750-2800A
5500A
EF Eri
![Page 11: SDSS & GALEX databases](https://reader036.fdocuments.in/reader036/viewer/2022062309/5681592d550346895dc6588e/html5/thumbnails/11.jpg)
Possibilities with GALEX
• Find variables in wide field repeat obs
• identify their type
• Find UV brightness of your objects
![Page 12: SDSS & GALEX databases](https://reader036.fdocuments.in/reader036/viewer/2022062309/5681592d550346895dc6588e/html5/thumbnails/12.jpg)
![Page 13: SDSS & GALEX databases](https://reader036.fdocuments.in/reader036/viewer/2022062309/5681592d550346895dc6588e/html5/thumbnails/13.jpg)
![Page 14: SDSS & GALEX databases](https://reader036.fdocuments.in/reader036/viewer/2022062309/5681592d550346895dc6588e/html5/thumbnails/14.jpg)
NUV
FUV
![Page 15: SDSS & GALEX databases](https://reader036.fdocuments.in/reader036/viewer/2022062309/5681592d550346895dc6588e/html5/thumbnails/15.jpg)
![Page 16: SDSS & GALEX databases](https://reader036.fdocuments.in/reader036/viewer/2022062309/5681592d550346895dc6588e/html5/thumbnails/16.jpg)
![Page 17: SDSS & GALEX databases](https://reader036.fdocuments.in/reader036/viewer/2022062309/5681592d550346895dc6588e/html5/thumbnails/17.jpg)
SDSS SkyServer things to look at:
• Tools (Scrolling sky)
• Visual Tools (Finding chart, Navigate, Explore)
• Help (Cooking with Sloan - Stars, SQL Tutorial)