GMOS Data Reduction

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Line plot for reduced combined 2x1 bias, 50lines averaged.
Difference image of two reduced stacked bias images. Each biasconsists of 35 combined individual exposures. These biases weretaken over a period of ∼ 1.5 months separated by ∼ 2 months
Page 1 and 2: Reducing GMOSSpectroscopic dataRica
Page 3 and 4: General Principles• Record everyt
Page 5: Notes on Bias and Dark• Standard
Page 8 and 9: Overscan “Spillover”R400 gratin
Page 10: Reduced combined 2x1 biasimage, con
Page 15 and 16: Flatfield Correction• Flats may b
Page 17 and 18: gsflatgsflat @flatfiles_460 out=Fla
Page 19 and 20: gsflatFitting the overscan region:
Page 21 and 22: gsflatFitting the “response” fu
Page 23 and 24: gsflatλRed flat field along the sp
Page 25 and 26: gsflatThere is a trade off between,
Page 27 and 28: Alignment starsGMOS MOS Spectra
Page 29 and 30: GMOS MOS reductionThe yoffset param
Page 31 and 32: gswavelengthgswavelenth @gsNarcfile
Page 33 and 34: gswavelengthDetermine wavelength so
Page 35 and 36: gswavelengthAutomatic line identifi
Page 37 and 38: gswavelengthFinding the wavelength
Page 39 and 40: gswavelengthOutput after fitting wa
Page 41 and 42: gswavelengthFinding the 2D waveleng
Page 43 and 44: gstransformgstransform gsNarcfile.f
Page 45 and 46: gsextractgsextract @tgsNsciencefile
Page 48 and 49: Raw Longslit N&SSpectrum
Page 50 and 51: Observing Tool N&SComponent2010B
Page 52 and 53: N&S Dark Correction• N&S darks ta
Page 54 and 55: Overscan fit for CCD1. By utilizing
Page 56 and 57: Zoom of reduced spectral image wher
Page 58 and 59: Flatfield Correction• GCALflats f
Page 60 and 61: Final normalized spectral image. Mi
Page 62 and 63:
N&S Sky Subtraction• Sky subtract
Page 64 and 65:
Bias corrected, dark subtracted, fl
Page 66:
Bias Correction• Not talking abou
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GMOS Data Reduction

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