Hello All,
I moved from the ZWO ASIAir to a mini-PC with N.I.N.A. and PD Capture. I'm working through the learning curve. I'm determined. I'm progressing by capturing and processing - just working through things as I go along.
Below is a list of eclipsing binaries I queried out of SkyTools 4. (Criteria of magnitude 7.5 < M < 13 and period of x < 1 day. I'm at ~ 34 deg lat and -118 deg long.) The problem is that SkyTools 4 strips the list of minima and maxima and the period when the list compiles.
Question: Are there any targets in this list that are a better candidate for a newbie principally looking to resolve on a workflow? I've done data on SW Lac and it has a short period and dramatic curve (if I processed the data correctly).
The instrument is a Celestron C8 with a mono ZWO ASI533. I use a 0.63 reducer (understanding the drawbacks) to get a 30' FOV.
Thanks -
Tony
Cls Primary ID RA (Ap) Dec (Ap) Mag Type
Var DL UMa 09h38m46.0s +69°31'30" 7.6 F0
DVar W UMa 09h45m26.2s +55°50'22" 7.8 G2
Var YY Eri 04h13m18.0s -10°24'29" 8.1 G5
Var V781 Tau 05h51m43.8s +26°58'08" 8.4 G0
Var SW Lac 22h54m47.5s +38°04'08" 8.5 G5
Var U Peg 23h59m11.7s +16°05'13" 9.2 G2
DVar AM Leo 11h03m25.4s +09°46'01" 9.2 F8
Var XY Leo 10h02m59.1s +17°17'36" 9.4
Var AB And 23h12m40.2s +37°01'33" 9.5
Var FG Hya 08h28m19.5s +03°26'12" 9.9
Var VZ Psc 23h29m02.0s +04°59'23" 10.2
Var DF Hya 08h56m18.6s +06°00'13" 10.3
Var RZ Com 12h36m15.7s +23°12'16" 10.4 G0
Var EQ Tau 03h49m39.0s +22°23'19" 10.5
Var AO Cam 04h30m07.8s +53°05'59" 10.5
Var V523 Cas 00h41m26.9s +50°22'20" 10.6
DVar GZ And 02h13m45.4s +44°46'31" 10.8
Var RW Com 12h34m10.5s +26°34'58" 11.0
Var CW Cas 00h47m18.6s +63°13'14" 11.0
Var V432 Per 03h11m47.2s +42°57'43" 11.2
Var GW Cep 01h48m36.9s +80°12'20" 11.2
Var AH Tau 03h48m38.9s +25°11'29" 11.2
Var CC Com 12h13m18.0s +22°23'57" 11.3
Var RT LMi 09h51m13.9s +34°20'28" 11.4
Var CE Leo 11h45m38.2s +23°13'22" 11.4
Var TY UMa 12h10m13.5s +55°53'43" 11.5
Var AH Gem 06h54m41.2s +15°57'40" 12.1
Var RW Tri 02h27m00.5s +28°12'26" 12.5
Var BL Leo 11h46m52.4s +24°38'49" 12.6
Var V480 Cas 01h49m26.8s +55°35'37" 13.0
Hi Anthony,
I also started out with EB's. Well you have to look for the whole time a minimum is going through.
a) You can observe many stars, with only 1h - 2h around the TOM (Time Of Minimum) and then switch to another star.
b) You can observe the whole minimum and have a nice decent lightcurve with the whole amplitude (from max to mim to max). This can take many hours..
c) You can observe Delta-Scuti-Pulsating stars. E.g. DY PEG, CY AQR, they have Maxima within 2 hours or even BL CAM, which has a max in even 1 h !
What I like about DSCT's, you do not need do look at the starting hour, just aim and shot, and after ...2h you have a ligth curve. (-:
BL CAM: Or you look at EPHEMERIS, to find out when the next max is occuring:
https://www.aavso.org/vsx/index.php?view=detail.top&oid=4622
DY PEG
https://www.aavso.org/vsx/index.php?view=detail.top&oid=25269
CY AQR
https://www.aavso.org/vsx/index.php?view=detail.top&oid=970
Have Fun.
CS Bernhard
Vielen dank, Bernhard. I have been meaning to acknowledge your post. I am fascinated by delta scuti variables. That is a good point about the observational commitment. Once I get my workflow down, I plan to branch out until I find my "purpose" with this.
Best -
Tony
Hi Tony,
High amplitude delta Scuti stars can be rewarding targets for amateur astronomers, and there aren't very many of them. If you determine the times of the peaks in the light curves you can plot O-C diagrams (with enough data) and thus see (and measure) the behaviour of the stars over time. Your own data can be combined with that of other AAVSO observers and data from professional sky surveys (e.g., TESS, but others as well).
If you want to do this, I'd recommend that you check out the literature on (for example) BS Aqr and AD CMi, both of which have been the subjects of articles in the JAAVSO. BS Aqr would be an easier target in terms of analysing the behaviour of the star over time, is in need of further publication, and has some interesting data in TESS. The AD CMi O-C diagram requires complex analysis as it appears to be in mutual orbit with a companion with a period of a few decades.
Another high amplitude delta Scuti star with changing periods over time is RS Gru, but it is of course far to the south.
SIMBAD is a good place to start if you are seeking literature on a particular star. For articles in the journal just Google the name of the star and JAAVSO.
Roy
Thanks, Roy. I certainly have some reading to do - which is what I love about this advocation of astromony.
Having revamped my computing hardware and software (N.I.N.A. and PD Capture), I might get a shot at collecting some data tonight. The weather is finally clearing up. It looks like it might be a drier winter than anticipated in California.
I'll take the material in your post and that of Bernhard's to explore this next phase. I think I'm about three to four months from providing quality data. But, I keep plugging along with it and reading.
Best -
Tony
Also you can use VSX.
Once in, just keep hitting the 'more' buttons until you get to an option to filter by type. Put HADS in that box (High Amplitude Delta Sct's) and search will show you all stars listed as HADS. You can also enter HADS% (the percent sign means "any character")
Thanks, Pox. I am doing some planning for when I might see the sky again. (The weather in Southern California has been miserable for astrophotography and photometry for months).
Tony