Trigonometric Calibration of the Distance Scale for Classical Novae

This version has accurate (FGS-based) magnitudes for the various reference stars. Some "became" fainter, which results in longer acquisition times. Therefore, some trimming of the exposures was neccessary for some visits to keep the sequence within the 1-orbit visibility window. ----- Attempting Submission 7 (Mon Jul 02 19:28:56 GMT 2007) ----- The short exposure time warnings, and the "target not used" warnings are to be ignored. -EN Trigonometric Calibration of the Distance Scale for Classical Novae The distance scale for classical novae is important for understanding the stellar physics of their thermonuclear runaways, their contribution to Galactic nucleosynthesis, and their use as extragalactic standard candles. Although it is known that there is a relationship between their absolute magnitudes at maximum light and their subsequent rates of decline--the well-known maximum-magnitude rate-of-decline (MMRD) relation--it is difficult to set the zero-point for the MMRD because of the very uncertain distances of Galactic novae. We propose to measure precise trigonometric parallaxes for the quiescent remnants of the four nearest classical novae. We will use the Fine Guidance Sensors, which are proven to be capable of measuring parallaxes with errors of ~0.2 mas, well below what is possible from the ground.

The target stars and thier associated reference stars will be observed at 2 epochs in Cycle 15. Each epoch will be comprised of two single-orbit HST visits. In each visit, the target and field stars will be observed multiple times in a sequential fashion by FGS1r in Position mode with the F583W filter for stars with V>8, or the F5ND attenuator for stars with V<8. Exposure times will be on the order of 10 second for each exposure. HOT STARS 12 false 0.0 false false false false false false SUPPORTED STAR CLASSICAL NOVA This object was generated by the target selector and retrieved from the SIMBAD database. B = 11.65 HD174107 GSC99448-00423 J2000 18 48 54.6366 +00 35 2.86 J2000 STAR CLASSICAL NOVA B = 10.2 HD21629 J2000 03 31 12.0000 +43 54 16.00 J2000 STAR CLASSICAL NOVA B = 12.5 J2000 06 35 36.0645 -62 38 24.30 J2000 STAR CLASSICAL NOVA B = 17.7 J2000 18 07 30.1700 +45 51 31.90 J2000 CALIBRATION ASTROMETRIC FPG=12.6, JPG=14.5, N=12.2 N1NN000210 J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC FPG=12.9, JPG=14.7, N=12.4 N1NN000232 J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC FPG=14.95, JPG=16.8, N=13.96 N1NN009734 J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC FPG=12.77, JPG=15.85, N=11.58 N1NN010051 J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC GSC2 classifies this as "non-star" JPG=12.71 N1NN036275 J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC FPG=11.8, JPG=13.16, N=11.72, B=13.55 N1NN000205 J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC FPG=14.2, JPG=17.0, N=12.85 N1NN010276 J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC FPG=14.43, JPG=15.8, N=13.8 N1NN010192 J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC FPG=14.05, JPG=16.3, N=12.8, B=17 N1NN010326 J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC Fpg=13.9, Jpg=16.3, Npg=13.37, B=16.55 NCIU008224 J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC Fpg=13.9, Jpg=15.24, Npg=13.5, B=14.9 NCIU001726 J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC Fpg=12.6, Jpg=14.03, Npg=12.17, B=14.15 NCIU001716 J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC Fpg=13.96, Jpg=15.85, Npg=13.4, B=16.1 NCIU008323 J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC Fpg=14.77, Jpg=16.71, Npg=14.14, B=16.85 NCIU008780 J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC Fpg=13.31, Jpg=14.88, Npg=12.92, B=14.75 NCIU001693 J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC Fpg=12.57, Jpg=13.92, Npg=12.14, B=14.06 NCIU001704 J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC Fpg=14.87, Jpg=16.89, Npg=14.39, B=17.35 NCIU007655 J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC Fpg=13.01, Jpg=15.32, Npg=12.27, B=15.32 NCIU001703 J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC Fpg=12.86, Jpg=14.39, Npg=12.39, B=14.42 NCIU008224 J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC Fpg=11.54, Jpg=12.5, Npg=11.6 S4FZ000367 J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC Fpg=11.9, Jpg=13.1, Npg=11.5 S4FZ000369 J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC Fpg=14.0, Jpg=15.6, Npg=13.7 S4FZ000370 J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC Fpg=13.6, Jpg=14.3, Npg=13.3 S4FZ000361 J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC Fpg=14.6, Jpg=16.3, Npg=14.2 S4FZ006820 J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC Fpg=14.4, Jpg=16.2, Npg=14.1 S4FZ006768 J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC Fpg=14.5, Jpg=16.4, Npg=14.3 S4FZ007048 J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC Fpg=13.2, Jpg=15.2, Npg=12.7 S4FZ000357 J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC Fpg=14.6, Jpg=16.0, Npg=14.3 S4FZ000362 J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC Fpg=14.6, Jpg=16.6, Npg=14.2 S4FZ006954 J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC Fpg=12.3, Jpg=14.0, Npg=12.0 S4FZ000375 J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC V=10.45, B=11.5 S4FZ000364 GSC889901409 J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC GSC352401367 J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC mu_alpha = -4.5 mu_delta = 9.2 Fpg=12.6, Jpg=13.6, Npg=12.1, B=13.7 N2DC000443 J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC GSC352401344 J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC mu_alpha = -10 mu_delta = -16 Fpg=14.0, Jpg=14.9, Npg=13.5, B=15.0 N2DC000428 J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC mu_alpha = 4.2 mu_delta = -15.2 Fpg=14.0. 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