Supernova SN 2019np
Last reported magnitude at AAVSO: 13.846
William Optics 71mm f/5.9
Altair 290M camera (uncooled)
Optolong Luminance
Unitron Model 142 GEM
Passive tracking with PEC
No active guiding
Gain 200 (1.74 e-/ADU, FWD: 7100e-, Read Noise: 1.55e-)
Offset: 25 ADU
Exposure: 25s
Camera rotation: 5 deg E of N
Lum: 150 frames
Flats: 100 frames
Darks: 20 frames
Bias: 100 frames
Total integration time: 62 minutes
SharpCap 3.1.5219
APP 1.071
Turbulent atmosphere
SN 2019np
Forum rules
Please upload large images to photo sharing sites (flickr, etc) rather than trying to upload them as forum attachments.
Please share the equipment used and if possible camera settings to help others.
Please upload large images to photo sharing sites (flickr, etc) rather than trying to upload them as forum attachments.
Please share the equipment used and if possible camera settings to help others.
SN 2019np
- Attachments
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- NGC-3254_SN-2019np_annotated_2019-02-10.jpg (510.33 KiB) Viewed 1666 times
Re: SN 2019np
Nice capture at least we can see other peoples images who can get out it's currently blowing a gale here and lashing down but allegedly the forecast for the end of the week is looking promising.
Cheers
Nick
Cheers
Nick
Re: SN 2019np
Brian
Interesting - where do you get these from? Thanks for the comprehensive capture details - most useful.
I found some detailed info here http://www.rochesterastronomy.org/supernova.html.
Dave
Interesting - where do you get these from? Thanks for the comprehensive capture details - most useful.
I found some detailed info here http://www.rochesterastronomy.org/supernova.html.
Dave
Re: SN 2019np
Thanks, everyone.
One of the perks of joining AAVSO: email notification of events.
Last night I noticed after posting that there appeared to be an artifact in the image that looked like a hair. I scrutinized all 150 lights this morning and discovered three frames that have cosmic rays. I removed those frames and restacked. Furthermore I decided to discard the worst 20% during integration based on each image's quality score. Now the total integration time is reduced from 62 minutes to 49 minutes but to me the image only looks better.
I've also attached an inverted image that is more practical for seeing fine details.
Brian
One of the perks of joining AAVSO: email notification of events.
Last night I noticed after posting that there appeared to be an artifact in the image that looked like a hair. I scrutinized all 150 lights this morning and discovered three frames that have cosmic rays. I removed those frames and restacked. Furthermore I decided to discard the worst 20% during integration based on each image's quality score. Now the total integration time is reduced from 62 minutes to 49 minutes but to me the image only looks better.
I've also attached an inverted image that is more practical for seeing fine details.
Brian
- Attachments
-
- NGC-3254_SN-2019np_49m_denoise_invert_2019-02-10.jpg (293.5 KiB) Viewed 1648 times
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- NGC-3254_SN-2019np_49m_denoise_2019-02-10.jpg (293.48 KiB) Viewed 1648 times