Log Book Entry No.68

Days, Calendar Created: 22 Feb 2015 00:11:56 Days, Calendar Last Revised: 22 Feb 2015 00:11:56 Person PaulHallam Text NGC2388 Low Magnitude Observation

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Start Time: 19:00

Conditions: Slightly cloudy at start, quickly became clear around 8pm and remained clear.


Castor (Alpha Gem)

Aligned to Castor, RA: 7h 34m 35.87s, Dec: 31dg 53' 17.82" Apparent Mag: 1.93

Ring visible due to cooling of CCD chip taking place.

Near Castor

Observed multiple stars near Castor with low magnitude (10 - 15)

No images taken.

Ring still visible.


Centred on galaxy NGC2388, Apparent Mag: 14.

NGC2388 was chosen as a target as it is known to currently contain a Supernaova of Apparent Magnitude 15. See http://www.rochesterastronomy.org/snimages/snactive.html

Supernovae: PSN J07285387+3349106, RA: 07:28:53.87, Dec: +33:49:10.6, z = 0.013790

One frame was taken at 120s exposure. Stars were cross checked with Stellarium and were found to be low magnitude (10-16). Two other galaxies were also clearly visible, NGC2385 and NGC2389. The cooling ring was still visible at the edges of the frame. This location was chosen for the target of this observation due to the number of low magnitude stars, and the presence of three galaxies.

Uploaded a frame to astrometry.net

Experimented with 180s exposure, decided to use 120s.

Stacked frames using MaximDL built in image stacker to invstigate noise reduction.

Images taken:

Data was taken in bursts of 9 images, 3 Light Frames with 120s exposure, 3 Dark Frames at 120s exposure and 3 Bias frames.

Dome was realigned every 2 bursts to ensure unobstructed view of the sky.

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Subject NGC2388 Low Magnitude Observation
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Topic revision: r1 - 22 Feb 2015 - PaulHallam

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