Maybe you find this interesting, as we are fond of OHP ...
T-193 (SOPHIE) at OHP, from the ground, has observed (radial velocities) the exoplanet kepler-16b (orbiting a binary star)
(https://arxiv.org/abs/2112.06584)
Search found 13 matches
- Fri Feb 25, 2022 2:22 pm
- Forum: Astrophysics, Theory, Publications ...
- Topic: Kepler-16 from OHP
- Replies: 0
- Views: 2846
- Sun Mar 28, 2021 3:34 pm
- Forum: Software ISIS
- Topic: how many bits?
- Replies: 1
- Views: 2580
how many bits?
Hello, When I which to make observations for later processing with ISIS, what ADU should I aim at for my flats, and maximum signal of stars? Like IRIS, ISIS is clipping everything above 32K. Is ISIS working from -32K to +32K, or is it in the 0-32K range? Does it sound OK to pre-process data in SIRIL...
- Fri Sep 23, 2016 8:29 pm
- Forum: Spectroscopes and Softwares
- Topic: Radial velocity errors
- Replies: 7
- Views: 6370
Re: Radial velocity errors
I autoguide using PHD2, which can oscilate like crazy when the slit that cuts a star image into two, and when the seeing is not that super. I think this clearly fits the problem mentioned! Up to now, I only know two alternatives (guide on a field star, or use a beam-splitter)... Maybe PHD2 will get ...
- Thu Sep 11, 2014 10:37 am
- Forum: Spectra, results, information on activity ...
- Topic: 51 Pegasi b exoplanet
- Replies: 8
- Views: 7277
Re: 51 Pegasi b exoplanet
Very very impressive. with special emphasis on the pivoting fans used to "jitter" the "modal noise"... I got curious about this noise, about this solution, and about how much improvement such solution would bring... But I also admire the presence of solar, lunar and diurnal shift...
- Mon Apr 28, 2014 11:38 pm
- Forum: Spectra, results, information on activity ...
- Topic: My frst Saturn
- Replies: 1
- Views: 2626
My frst Saturn
And this is my first spectrum of Saturn! C11 + Lhires III, 2400 l/mm, 15 um slit + KAF-403 I averaged the shifts of 6 lines, measuring between 1.3 and 1.4 Angstrom shifts. This suggests to a shift of 62.3 km/s (maybe I should have just measured the H-alpha line?) Since Saturn is very close to opposi...
- Wed Mar 05, 2014 9:49 pm
- Forum: Outbursts, Alerts, Monitoring
- Topic: PSN J09554214+6940260 in M82 - mag V 11.7
- Replies: 51
- Views: 63036
Re: PSN J09554214+6940260 in M82 - mag V 11.7
Hi Robin, They are unguided, yes.. the star was drifting about 1 stellar diameter (3.6") per 3 or 4 images (~10 min).. But I did spend around 45 min drift-aligning the mount (not in an observatory yet). Having this light drift causes hotpixels to fall out of place in consecutive images, but the...
- Tue Mar 04, 2014 10:47 pm
- Forum: Outbursts, Alerts, Monitoring
- Topic: PSN J09554214+6940260 in M82 - mag V 11.7
- Replies: 51
- Views: 63036
Re: PSN J09554214+6940260 in M82 - mag V 11.7
I have these two observations taken with SA100.. These are the two first spectra I ever took with SA100.. So I expect them to be wrong in some aspect... How "wrong" do they look? They represent SN2014j, subtracted by the just-above&below sky background that includes M82 spectrum. No at...
- Tue Apr 09, 2013 1:48 am
- Forum: Spectra, results, information on activity ...
- Topic: Pan-STARRS comet spectrum
- Replies: 42
- Views: 73919
Re: Pan-STARRS comet spectrum
After what has been presented, I feel somewhat ashamed for this post, because it is a very noisy and bad spectrum.. But I tried to go after the tail, and it is difficult.. I also think the resolution I have of the light pollution is very low, so something was likely done wrong.. (collimator focus? T...
- Mon Mar 25, 2013 1:03 pm
- Forum: Spectra, results, information on activity ...
- Topic: Pan-STARRS comet spectrum
- Replies: 42
- Views: 73919
Re: Pan-STARRS comet spectrum
We are seeing it in the perspective of the Earth-living observer.. It could be interesting to have another eye out there in the Solar System.. But coming back to Earth, the idea of using a shorter focal length is a good one! But it appears we need even more field of view... If the Sodium is near the...
- Wed Nov 09, 2011 7:32 pm
- Forum: Spectra, results, information on activity ...
- Topic: Planetary Nebulae with Lhires
- Replies: 3
- Views: 4910
Re: Planetary Nebulae with Lhires
Thank you Robin and Olivier.. Perhaps I was worried about doing something wrong, or not having focused correctly because I thought the signal was very weak.. But if the Helix is faint, that explains it... I am not yet acquainted with the differences in exposure from normal take-a-pic to spectr-a-pic...