QSOs and Twin Quasar Q0957+561 Near NGC3079 Galaxy
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QSOs and Faint Galaxies Near NGC3079 Galaxy from SkyTools 3c Pro
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Other verisons of the above image.
This image has the following interesting objects.
- The brightest is the edge-on spiral Seyfert galaxy NGC3079 with active galactic nuclei (AGN).
- The Twin Quasar is caused by gravitational lens at magnitude 16.7.
- QSO PC 0958+5625 (Q 0958+5625) redshift is 3.216527 with a light travel-time of 11.323 Gyr.
The light from QSO PC 0958+5625 is over twice as old as our solar system. QSO PC 0958+5625 magnitude is 20.08.
- 4C 55.17 is a Blazar with a 17.9 magnitude.
Twin Quasar Q0957+561 or [HB89] 0957+561 Information
Twin Quasar Q0957+561
The two images of the same Quasar are caused by gravitational lens. The Twin Quasar is in Ursa Major.
Q0957+561 is Twin Quasar and Q0957+561B on Sky Tools Pro chart center
The 2X scaled images are calibrated images with darks, and flats. The 2X scaled images are simple stretched with the black and white points in MaxIm DL to see the faint details.
No other image processing like gamma curve adjustment, sharpening, smoothing or nonlinear stretching was done on the below 2X scaled images.
[HB89] 0957+561 in NASA/IPAC Extragalactic database information:
- Redshift 1.414632 as corrected to the Reference Frame defined by the 3K Microwave Background Radiation
- Light Travel-Time: 8.852 Gyr
- Age at Redshift 1.414632: 4.447 Gyr
- Age of Universe: 13.299 Gyr
- Magnitude and Filter: 16.7
MaxIm DL Area Plot of the Twin Quasar
Quasar Information
Quasi-Stellar Object (QSO) SBS 0957+557 Information
SBS 0957+557 on Sky Tools Pro chart bottom center edge
SBS 0957+557 in NASA/IPAC Extragalactic database information:
- Redshift 2.091539 as corrected to the Reference Frame defined by the 3K Microwave Background Radiation
- Light Travel-Time: 10.181 Gyr
- Age at Redshift 2.091539: 3.117 Gyr
- Age of Universe: 13.299 Gyr
- Magnitude and Filter: 17.5
Quasi-Stellar Object (QSO) SBS 0955+560 Information
SBS 0955+560 on Sky Tools Pro chart right edge
SBS 0955+560 in NASA/IPAC Extragalactic database information:
- Redshift 1.034090 as corrected to the Reference Frame defined by the 3K Microwave Background Radiation
- Light Travel-Time: 7.651 Gyr
- Age at Redshift 1.034090: 5.648 Gyr
- Age of Universe: 13.299 Gyr
- Magnitude and Filter: 17.6g
Quasi-Stellar Object (QSO) PC 0958+5625 Information
PC 0958+5625 is Q 0958+5625 on Sky Tools Pro chart top center edge
PC 0958+5625 in NASA/IPAC Extragalactic database information:
- Redshift 3.216527 as corrected to the Reference Frame defined by the 3K Microwave Background Radiation
- Light Travel-Time: 11.323 Gyr
- Age at Redshift 3.216527: 1.975 Gyr
- Age of Universe: 13.299 Gyr
- Magnitude and Filter: 20.08
MaxIm DL Area Plot of QSO PC 0958+5625
Blasar Information
Blasar Object 4C +55.17 Information
4C +55.17 on Sky Tools Pro chart bottom right corner
4C +55.17 in NASA/IPAC Extragalactic database information:
- Redshift 0.896042 as corrected to the Reference Frame defined by the 3K Microwave Background Radiation
- Light Travel-Time: 7.086 Gyr
- Age at Redshift 0.896042: 6.213 Gyr
- Age of Universe: 13.299 Gyr
- Magnitude and Filter: 17.9g
Galaxy Information
NGC 3079
Seyfert Galaxy in Ursa Major
Other Bright Galaxies in the Image
Image Information
- This is my first image of a gravitational lens (Wikipedia) object.
- Field of view of full image: 77.2 arcminutes wide x 50.4 arcminutes high
- Image scale of 2.12 arcsec/pix. The Twin Quasars are only 6 arcsec apart. I am happy to split the Twin Quasars at this low resolution image scale.
- Top image is half size
- North is top and west is right
- Exposure: 49 images x 120 seconds per image (98 minutes total)
- Darks: 89 x 120 seconds per dark frame
- Flats: 128 x 2 seconds per flat frame
- Darks for Flats: 128 x 2 seconds per dark frame
- CCD-TEMP: -25°C
- Astronomik Type IIc Luminance filter
- Guided
- Information: Measure Signal to Noise of the background with no stars
- Background average 1159.396/background Std Dev 0.592 = Signal to Noise 1958.439
Observing Information
- OBS-Location: Camas, WA USA, 16.6 miles East-North-East from the center of Portland, OR
- Image taken through the Vancouver, WA USA sky glow
- DATE-Local = May 24, 2009 at 11:05 pm to May 25 at 12:54 am PDT
- Twin Quasar altitude is the red dashed line in the SkyTools 3c Pro screen below.
- The blue line is Twin Quasar imaging quality throughout the night.
Imaging Equipment
Imaging Processing
- AIP4WIN V2.2 measure image
- Diffraction Limited MaxIm DL V5.05
- Create master dark with SD Mask combine
- Create master flat dark with SD Mask combine
- Create master flat with SD Mask combine
- Calibrate images with master dark and master flat
- Create master calibrated image with stack, Auto - star matching and SD Mask combine
- Rotate 180 degrees so that north is at the top
- Auto remove Gradient, remove Vancouver, WA USA sky glow.
- Digital Development Auto with Kernal - User Filter to no sharpening
- Curves to stretch image accross 16-bits
- Auto remove Gradient 2nd time, remove Vancouver, WA USA sky glow.
- Local Adaptive Filter, Radius 3 and Contrast 3
- Screen Stretch using Max Value: 0 to 66914
- Save as FIT
- Save as 16-bit TIFF for Photoshop, Stretch, Linear Only, Input Range Screen Stretch, Output Range 16-bit
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- Adobe Photoshop CS3 10.0.1
- Smart Sharpen
- Reduce Noise
- Crop stacking edge affects
- Resize to half size for webpage
- Save as JPG for webpage
- Make negative image and save as JPG for webpage
- Add marks to negative image and save as JPG for webpage
The following test pattern is to help you adjust your monitor to best view the CCD astro images.
The test pattern is used for adjusting monitor brightness, and contrast.
Adjust monitor brightness and contrast to see all 16 gray scale levels.
The most important adjustment when viewing astro images is to see the differences in all of the black bands.
© 1998-2009 David Haworth
![[HB89] 0957+561](jpg/Q0957_561.jpg)
