Koen Van der Auwera - NGC4565_TS90_QHY_48x120_OptolongLPro_kvda

SIMPLE = T / file does conform to FITS standard

BITPIX = -32 / number of bits per data pixel

NAXIS = 3 / number of data axes

NAXIS1 = 2671 / length of data axis 1

NAXIS2 = 2361 / length of data axis 2

NAXIS3 = 3 / length of data axis 3

EXTEND = T / FITS dataset may contain extensions

COMMENT FITS (Flexible Image Transport System) format is defined in 'Astronomy

COMMENT and Astrophysics', volume 376, page 359; bibcode: 2001A&A...376..359H

BZERO = 0 / offset data range to that of unsigned short

BSCALE = 1 / default scaling factor

DATE = '2025-04-13T17:11:16' / UTC date that FITS file was created

DATE-OBS= '2025-04-04T20:19:01.244000' / YYYY-MM-DDThh🇲🇲ss observation start,

INSTRUME= 'QHY CCD QHY533C-39d9544' / instrument name

OBSERVER= ' ' / observer name

TELESCOP= 'TS 90 APO 468@F\5.2' / telescope used to acquire this image

ROWORDER= 'BOTTOM-UP' / Order of the rows in image array

XPIXSZ = 3.76 / X pixel size microns

YPIXSZ = 3.76 / Y pixel size microns

XBINNING= 1 / Camera binning mode

YBINNING= 1 / Camera binning mode

FOCALLEN= 468 / Camera focal length

CCD-TEMP= 10.6 / CCD temp in C

EXPTIME = 120 / Exposure time [s]

STACKCNT= 48 / Stack frames

LIVETIME= 5760 / Exposure time after deadtime correction

EXPSTART= 2.46077e+006 / Exposure start time (standard Julian date)

EXPEND = 2.46077e+006 / Exposure end time (standard Julian date)

IMAGETYP= 'Light Frame' / Type of image

OBJECT = 'NGC 4565' / Name of the object of interest

GAIN = 68 / Camera gain

OFFSET = 10 / Camera offset

SITELAT = 51 / [deg] Observation site latitude

SITELONG= 4.51667 / [deg] Observation site longitude

CTYPE1 = 'RA---TAN' / Coordinate type for the first axis

CTYPE2 = 'DEC--TAN' / Coordinate type for the second axis

CUNIT1 = 'deg ' / Unit of coordinates

CUNIT2 = 'deg ' / Unit of coordinates

EQUINOX = 2000 / Equatorial equinox

OBJCTRA = '12 36 20.27' / Image center Right Ascension (hms)

OBJCTDEC= '25 58 36.80' / Image center Declination (dms)

RA = 189.085 / Image center Right Ascension (deg)

DEC = 25.9769 / Image center Declination (deg)

CRPIX1 = 1330 / Axis1 reference pixel

CRPIX2 = 1158 / Axis2 reference pixel

CRVAL1 = 189.084 / Axis1 reference value (deg)

CRVAL2 = 25.9769 / Axis2 reference value (deg)

CDELT1 = -0.000460404 / X pixel size (deg)

CDELT2 = 0.000460404 / Y pixel size (deg)

PC1_1 = 0.196985 / Linear transformation matrix (1, 1)

PC1_2 = -0.980407 / Linear transformation matrix (1, 2)

PC2_1 = 0.980407 / Linear transformation matrix (2, 1)

PC2_2 = 0.196985 / Linear transformation matrix (2, 2)

AIRMASS = 1.36135 / Airmass

HISTORY mean stacking with winsorized sigma clipping rejection (low=3.000 high=3

HISTORY .000), additive+scaling normalized input, normalized output, no image we

HISTORY ighting, equalized RGB

HISTORY TOP-DOWN mirror

HISTORY Crop (x=174, y=302, w=2671, h=2361)

HISTORY Background extraction (Correction: Subtraction)

HISTORY Color Calibration

HISTORY Background extraction (Correction: Subtraction)

HISTORY Cosmetic Correction

HISTORY Photometric CC

HISTORY Saturation enhancement (amount=0.37)

HISTORY Deconvolution

HISTORY Histogram Transf. (mid=0.001, lo=0.000, hi=1.000)

HISTORY Asinh Transformation: (stretch= 0.0, bp=0.16313)

HISTORY GHS SAT pivot: 0.000, amount: 0.97, local: 0.00 [0.00 0.32]

END

Done