Hardware and Software Overhaul - Suggested Targets - Still Working on Workflow

American Association of Variable Star Observers (AAVSO)
Wed, 01/10/2024 - 03:29

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 -


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


Bundesdeutsche Arbeitsgemeinschaft fur Veranderliche Sterne e.V.(Germany) (BAV)

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:









Have Fun.

CS Bernhard


American Association of Variable Star Observers (AAVSO)
Vielen dank, Bernhard. I…

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 -


Variable Stars South (VSS)
Going beyond light curves

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.


American Association of Variable Star Observers (AAVSO)
Thanks, Roy. I certainly…

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 -


American Association of Variable Star Observers (AAVSO)

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")

American Association of Variable Star Observers (AAVSO)
Thanks, Pox. I am doing some…

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).