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Final Datasets for BD+28D4211



Dataset Range Texp MJD QF
UVSUM_1M_50710-58009 FITS ETC 1150−3118 47560 50710 366
UVSUM_2H_50812-58008 FITS ETC 2129−2845 76704 50812 203
E140H-1416_0.2x0.2_50812-58009 FITS ETC 1316−1517 38155 50812 369

Notes. Spectral Range is in Å. Texp is maximum monochromatic exposure (in s), accounting for co-additions and splices. MJD is first start date of sequence. QF is quality factor (average S/N per resel).


Preview. In main panel (left), spectrum is blue and photometric error (1σ per resel) red. Flux density and error tracings were heavily smoothed for display. Fluxes are clipped at photometric error. For weak spectra, error tracing dominates. Highly structured error curve is due to rapidly varying "echelle blaze."

Right panel depicts observation time line. Each exposure start is marked by vertical bar spanning wavelength range of mode (bottom of frame is 1000 Å; top, 3300 Å). Gray shading delimits FUV; upper unshaded zone, NUV. Color coding: E140M, E140H, E230M, E230H.


Data table. Dataset column drills down to next layer: contributing exposures. Bottom-most level: o-type sub-exposures. FITS returns .fits file containing data products. EXTEN=0 is header describing target, observation, and processing history. EXTEN=1 holds wavelength, flux, photometric error, and data quality flag. If dataset is o-type with two or more sub-exposures, EXTEN=1 is coadded spectrum, sub-exp 1 is in EXTEN=2, sub-exp 2 in EXTEN=3, and so forth. ETC returns flat-ASCII file designed for Exposure-Time Calculator adhering to STScI standards. Specially filtered ETC spectrum is NOT SUITABLE for analysis.


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