Proposal #549

I have started observing USNO-B1.0 1295-0410006 a DCEP with a 10.2865-d period. I have been doing a program of observing and obtaining transformed light curves for over 60 long-period cepheids sampled over the last 5 years or so. Most have been observed in four-colors, B, V, Rc, and Ic. A grand tome with color indices, times of maxima, DC DFT determined periods, and Fourier coefficients for the phased LCs is in final writing stages covering 53 of them. I am currently observing 8 DCEPs and one CWA. A sequence has recently been generated by the sequence team and UID assigned, 000-BPY-764.

I'm using my portable observing setup Atik490EX + Esprit 100. This object is very reddened and I'm not able to get any signal in B for this DCEP. I am getting good V, Rc, and Ic measurements with my small system.

Proposal goals:
1. Johnson B & V,
2. one observation in each filter every clear night,
3. until the end of current observing season or upon notification from the proposer if sufficient phase coverage is obtained sooner.

I would like to get Johnson B & V with an SNR of at least 10 or better higher that are transformable to the standard system. I use simple linear coefficients to transform for my home systems and would prefer to use my software tools here at home to extract and reduce the photometry from the images. I use Aperture Photometry Tool and excel to do the transforms.

I need good sampling at all phases to be able to generate good times of maxima and allow Fourier fitting of the phase-folded LCs. The V overlap with my small telescope system will allow any bias to be determined between observing systems.

Best regards, DEY