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QSI -

Markarian's Chain of Galaxies

Objects Information
Markarian's chain of galaxies are in Virgo. 43 galaxies are identifed in the above image.

• Astronomy Picture of the Day 2006 October 11
• Astronomy Picture of the Day 2008 April 25
• Markarian's Eyes 2007 June 8
• Wikipedia
• SEDS
• Deep Virgo - Markarian's Chain
• Markarian's Chain: Galaxy Group
• Observing Markarian's Chain — A One-Night Project

Other verisons of the above image.

• Negative image
• Negative image with labels

Image	Galaxy Names NASA-IPAC Extragalactic Data	Image	Galaxy Names NASA-IPAC Extragalactic Data	Image	Galaxy Names NASA-IPAC Extragalactic Data
	M84, NGC4374, PGC 040455 and SEDS Messier M84		M86, NGC4406, PGC 040653 and SEDS Messier M86		NGC4387 and PGC 040562
	NGC4402 and PGC 040644		NGC4407, NGC4413 and PGC 040705		NGC4425 and PGC 040816
	NGC4435 and PGC 040898		NGC4438 and PGC 040914		NGC4458 and PGC41095
	NGC4461 and PGC41111		NGC4473 and PGC41228		NGC4477 and PGC41260
	NGC4479 and PGC41302		IC3280 and PGC40372 Label: B		IC3303 and PGC 040485
	IC3344 and PGC40706		IC3355 and PGC 040754		IC3363 and PGC 040786
	IC3382 and PGC40954		IC3388 and PGC 041018		IC3393 and PGC 041054
	PGC40434		PGC40505		PGC40598
	PGC40636		PGC40707		PGC40767
	PGC40958		PGC41007		PGC41136
	PGC41195		SDSS J122529.05+132953.3 Label: A		PGC040534
	VCC1314		VCC1298		VCC0972
	VCC0968		VPC0466		VCC1123
	VPC0415		VPC0513		VPC0455
	NGC4388

Photo Information

• Field of view: 101.5 arcminutes wide x 68.4 arcminutes high
• Image is half size
• North is top and west is right
  
• Exposure: 22 images x 120 seconds per image
• CCD-TEMP: -29°C
• Astronomik Type IIc Luminance filter
• Guided

Photo Statistics on Full Size Calibrated Image

• Background area selected has no bright stars or galaxies
• Background Signal to Noise Ratio = 101
• Background Mean = 183.6239
• Background StdDev = 1.809365
• Region = Annular Square
• Outer radius = 30
• Center = (1309,815)
• Outer region = (1279,785)-(1339,845)
• Number of pixels = 3721

Observing Information

• OBS-Location: norteast of Moro, OR USA
• DATE-Local = May 1, 2008
• TIME-Local of first image = 11:21 PM
• Clouds stopped the imaging session

QSI Imaging Equipment on Pentax

• QSI 532ws-M1 CCD camera
• Pentax 75mm SDHF APO 3-element design refractor (f/6.7 focal ratio, 500mm focal length) telescope
• The telescope mount is the Orion Telescopes and Binoculars Sirius EQ-G with GoTo Controller

Imaging Processing

• Diffraction Limited MaxIm DL V4.60
• Calibrated with 65 dark frames
• Calibrated with 128 2 second flat frames and 128 2 second dark frames
• DPP, screen stretch and save as TIFF
• AIP4WIN V2.20
• Measure whole image statistics, and fix two vertical lines
• Corel Paint Shop Pro Photo XI convert TIF to JPG

Monitor Test Pattern

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.

© 1998-2008 David Haworth