M13 === Four 60-second exposures in the Sloan g', r', i', and z' filters taken at the University of Louisville Manner Telescope on Mt. Lemmon, Arizona, on the night of June 24, 2023, local time. The color image m13_202320230625_irg_rgb.png was created in SAOImage ds9 using rgb mode with inputs from the i', r', and g' images centered using the WCS headers. The flux mapping used log scale base 100. The ranges were adjusted for a visual color with the saturated stars white and a nominal balance allowing for the greater sensitivity of the camera to blue light. This is a "false color" image, but blue would correspond to visual blue, while red would be near infrared, and green would be orange. The 0.6 meter Ritchie Chretien telescope has a ZWO 6200 CMOS camera providing a pixel scale of 0.165 arseconds. Images were recored in full spatial resolution with 16-bit depth. Image quality is of the order of 2 to 3 arcseconds limited by seeing and focus in these files. Astrometry is from a fit using Astrometry.net local software The header of the g' image is listed below. SIMPLE = True BITPIX = -32 NAXIS = 2 NAXIS1 = 9576 NAXIS2 = 6388 COMMENT = FITS (Flexible Image Transport System) format is defined in 'Astronomy COMMENT = and Astrophysics', volume 376, page 359; bibcode: 2001A&A...376..359H SBUUID = {5255426a-af80-4c32-bce4-aa06c40a103c} EXPTIME = 60.0 SWCREATE = TheSky Version 10.5.0 Build 13479 (64 bit) COLORCCD = 0 DISPINCR = 1 PICTTYPE = 1 IMAGETYP = Light Frame XORGSUBF = 0 YORGSUBF = 0 XBINNING = 1 YBINNING = 1 CCD-TEMP = -10.0 SET-TEMP = -10.0 SITELAT = +32 13 57.72 SITELONG = +110 56 45.60 LST = +16 16 34.03 OBSGEO-B = 32.2327003479004 OBSGEO-L = -110.945999145508 OBSGEO-H = 0.0 INSTRUME = ASICamera XPIXSZ = 3.76 YPIXSZ = 3.76 READOUTM = Long Exposure Mode CDS = Long Exposure Mode FILTER = GP DATE-OBS = 2023-06-25T05:28:05.591 LOCALTIM = 6/25/2023 01:28:05.589 AM STD OFFSET = 50 GAINRAW = 0 Bandwidth setting = 40 GAINADU = 0.779999971389771 DATE = 2023-10-01 05:12:29 HISTORY = Dark subtracted by fits_dark HISTORY = Image file m13_20230625_GP_00000010.fits HISTORY = Dark file ../dark/dark-60s.fits COMMENT = Original key: "END" COMMENT = COMMENT = --Start of Astrometry.net WCS solution-- COMMENT = --Put in by the new-wcs program-- COMMENT = WCSAXES = 2 CTYPE1 = RA---TAN-SIP CTYPE2 = DEC--TAN-SIP EQUINOX = 2000.0 LONPOLE = 180.0 LATPOLE = 0.0 CRVAL1 = 250.310491063 CRVAL2 = 36.3886523292 CRPIX1 = 7209.77282715 CRPIX2 = 4743.88336182 CUNIT1 = deg CUNIT2 = deg CD1_1 = -4.57566490991e-05 CD1_2 = -2.37094196435e-07 CD2_1 = 2.67025129984e-07 CD2_2 = -4.57355895049e-05 IMAGEW = 9576 IMAGEH = 6388 A_ORDER = 2 A_0_0 = 0 A_0_1 = 0 A_0_2 = -1.84386098384e-07 A_1_0 = 0 A_1_1 = -1.11831584857e-08 A_2_0 = -1.70883813541e-07 B_ORDER = 2 B_0_0 = 0 B_0_1 = 0 B_0_2 = -2.10269174125e-07 B_1_0 = 0 B_1_1 = 1.05160599907e-07 B_2_0 = -7.62692136126e-08 AP_ORDER = 2 AP_0_0 = 0.00196734226369 AP_0_1 = -1.7917857188e-07 AP_0_2 = 1.83951896605e-07 AP_1_0 = -3.85584311079e-07 AP_1_1 = 1.0942746817e-08 AP_2_0 = 1.70403458952e-07 BP_ORDER = 2 BP_0_0 = 0.00080459423455 BP_0_1 = 3.10285112347e-07 BP_0_2 = 2.10043615349e-07 BP_1_0 = -3.02772628284e-07 BP_1_1 = -1.05168448694e-07 BP_2_0 = 7.60967546858e-08 HISTORY = Created by the Astrometry.net suite. HISTORY = For more details, see http://astrometry.net. HISTORY = Git URL https://github.com/dstndstn/astrometry.net HISTORY = Git revision 0.93 HISTORY = Git date Mon_Dec_19_16:41:15_2022_-0500 HISTORY = This is a WCS header was created by Astrometry.net. COMMENT = Original WCS key: "DATE" _ATE = 2023-10-01T01:12:46 COMMENT = -- onefield solver parameters: -- COMMENT = Index(0): /usr/local/astrometry/data/index-4208.fits COMMENT = Index(1): /usr/local/astrometry/data/index-4207-02.fits COMMENT = Index(2): /usr/local/astrometry/data/index-4206-02.fits COMMENT = Index(3): /usr/local/astrometry/data/index-4205-02.fits COMMENT = Index(4): /usr/local/astrometry/data/index-4204-10.fits COMMENT = Index(5): /usr/local/astrometry/data/index-4203-10.fits COMMENT = Index(6): /usr/local/astrometry/data/index-4202-10.fits COMMENT = Index(7): /usr/local/astrometry/data/index-4201-10.fits COMMENT = Index(8): /usr/local/astrometry/data/index-4200-10.fits COMMENT = Field name: ./m13_20230625_GP_00000010_d.axy COMMENT = Field scale lower: 0.16 arcsec/pixel COMMENT = Field scale upper: 0.17 arcsec/pixel COMMENT = X col name: X COMMENT = Y col name: Y COMMENT = Start obj: 10 COMMENT = End obj: 20 COMMENT = Solved_in: (null) COMMENT = Solved_out: ./m13_20230625_GP_00000010_d.solved COMMENT = Parity: 2 COMMENT = Codetol: 0.01 COMMENT = Verify pixels: 1 pix COMMENT = Maxquads: 0 COMMENT = Maxmatches: 0 COMMENT = Cpu limit: 300.000000 s COMMENT = Time limit: 0 s COMMENT = Total time limit: 0 s COMMENT = Total CPU limit: 300.000000 s COMMENT = Tweak: yes COMMENT = Tweak AB order: 2 COMMENT = Tweak ABP order: 2 COMMENT = -- COMMENT = -- properties of the matching quad: -- COMMENT = index id: 4205 COMMENT = index healpix: 2 COMMENT = index hpnside: 1 COMMENT = log odds: 316.84 COMMENT = odds: 3.99854e+137 COMMENT = quadno: 1089729 COMMENT = stars: 201385,201321,201387,201322 COMMENT = field: 9,17,4,8 COMMENT = code error: 0.00928153 COMMENT = nmatch: 50 COMMENT = nconflict: 1 COMMENT = nfield: 6767 COMMENT = nindex: 51 COMMENT = scale: 0.164689 arcsec/pix COMMENT = parity: 1 COMMENT = quads tried: 714 COMMENT = quads matched: 126 COMMENT = quads verified: 0 COMMENT = objs tried: 18 COMMENT = cpu time: 0.004216 COMMENT = -- COMMENT = COMMENT = --End of Astrometry.net WCS-- COMMENT = --(Put in by the new-wcs program)-- COMMENT =