NGC 4214 astrometry: 2014mar/astrom2/ 2014apr/astrom2/ NGC 4214 Halpha -- FWHM(pix) mag mult 2014mar/astrom2/lmi_astrom_n1.0056 R 3.3 10.76 1.71 X 2014mar/astrom2/lmi_astrom_n1.0057 Ha 2.9 11.53 1.13 2014mar/astrom2/lmi_astrom_n1.0058 Ha 3.4 11.64 1.25 X 2014mar/astrom2/lmi_astrom_n1.0059 R 3.8 10.75 1.69 X 2014mar/astrom2/lmi_astrom_n2.0063 Ha 5.5 11.56 1.16 2014mar/astrom2/lmi_astrom_n2.0064 R 5.2 10.33 1.15 2014mar/astrom2/lmi_astrom_n2.0065 R 4.3 10.69 1.60 X 2014mar/astrom2/lmi_astrom_n2.0066 Ha 4.3 11.52 1.12 2014mar/astrom2/lmi_astrom_n2.0067 Ha 3.7 11.66 1.27 X 2014mar/astrom2/lmi_astrom_n2.0068 R 3.6 10.20 1.02 2014mar/astrom2/lmi_astrom_n2.0069 R 3.6 10.19 1.01 2014mar/astrom2/lmi_astrom_n2.0070 Ha 3.7 11.58 1.18 2014mar/astrom2/lmi_astrom_n2.0071 Ha 3.2 11.51 1.11 2014mar/astrom2/lmi_astrom_n2.0072 R 3.4 10.18 --- 2014mar/astrom2/lmi_astrom_n2.0073 R 4.0 10.19 1.01 2014mar/astrom2/lmi_astrom_n2.0074 Ha 3.4 11.42 1.02 2014mar/astrom2/lmi_astrom_n2.0075 Ha 3.0 11.40 --- 2014mar/astrom2/lmi_astrom_n2.0076 R 3.4 10.18 --- 2014mar/astrom2/lmi_astrom_n2.0078 R 3.2 10.18 --- 2014mar/astrom2/lmi_astrom_n2.0079 Ha 3.2 11.41 1.01 NGC 4214 [OIII] -- FWHM(pix) mag mult 2014mar/astrom2/lmi_astrom_n2.0083 V 4.2 10.79 X 2014mar/astrom2/lmi_astrom_n2.0084 OIII 4.2 11.66 1.42 X 2014mar/astrom2/lmi_astrom_n2.0085 OIII 4.3 11.66 1.42 X 2014mar/astrom2/lmi_astrom_n2.0086 V 3.8 10.79 X 2014mar/astrom2/lmi_astrom_n2.0087 V 4.0 10.79 X 2014mar/astrom2/lmi_astrom_n2.0088 OIII 3.9 11.69 1.46 X 2014apr/astrom2/lmi_astrom_n1apr.0061 OIII 2.5 11.31 1.03 2014apr/astrom2/lmi_astrom_n1apr.0062 V 2.3 11.79 1.01 2014apr/astrom2/lmi_astrom_n1apr.0063 V 2.2 11.79 1.01 2014apr/astrom2/lmi_astrom_n1apr.0064 OIII 2.4 11.28 --- 2014apr/astrom2/lmi_astrom_n1apr.0065 OIII 2.7 11.28 --- 2014apr/astrom2/lmi_astrom_n1apr.0066 V 3.0 11.78 --- 2014apr/astrom2/lmi_astrom_n1apr.0067 V 3.0 11.80 1.02 2014apr/astrom2/lmi_astrom_n1apr.0068 OIII 4.6 11.29 1.01 2014apr/astrom2/lmi_astrom_n1apr.0069 OIII 2.5 11.28 --- 2014apr/astrom2/lmi_astrom_n1apr.0070 V 2.5 11.83 1.05 2014apr/astrom2/lmi_astrom_n1apr.0071 V 3.1 11.84 1.06 2014apr/astrom2/lmi_astrom_n1apr.0072 OIII 2.7 11.36 1.08 2014apr/astrom2/lmi_astrom_n1apr.0073 OIII 3.4 11.57 1.31 2014apr/astrom2/lmi_astrom_n1apr.0074 V 4.3 12.27 1.57 X 2014apr/astrom2/lmi_astrom_n1apr.0075 V 4.0 12.25 1.54 X 2014apr/astrom2/lmi_astrom_n1apr.0076 OIII 3.2 11.54 1.27 2014apr/astrom2/lmi_astrom_n2apr.0031 OIII 5.9 11.55 1.28 2014apr/astrom2/lmi_astrom_n2apr.0032 V 4.4 11.83 1.05 2014apr/astrom2/lmi_astrom_n2apr.0033 V 6.0 11.91 1.13 2014apr/astrom2/lmi_astrom_n2apr.0034 OIII 5.4 11.35 1.07 2014apr/astrom2/lmi_astrom_n2apr.0035 OIII 5.5 11.35 1.07 2014apr/astrom2/lmi_astrom_n2apr.0036 V 5.3 11.86 1.08 2014apr/astrom2/lmi_astrom_n2apr.0037 V 5.1 11.85 1.07 2014apr/astrom2/lmi_astrom_n2apr.0038 OIII 5.4 11.36 1.08 mult.cl ---> imcopy or imarith ---> lmi_astrom*_m.00*.fits straight averages: n4214ha_ave, n4214r_ave, n4214oiii_ave, n4214v_ave tests on Halpha--- straight average -- FWHM = 3.5, peak = 33850 mag= 10.59 with ccdclip -- 2.8 38735 10.69 zero=mode, snoise=0.1 -- 3.0 37150 10.65 zero=mode, snoise=0.05 -- looks very mottled zero=none -- 3.2 35987 10.65 zero=mode, snoise=0 <--- This one is better ----> better with ccdclip, zero=mode, snoise=0 better photometry, nicer looking PSF, less mottled, removes CRs TASK = imcombine input = @list_ha List of images to combine output = testha_snoise0 List of output images (headers= ) List of header files (optional) (bpmasks= ) List of bad pixel masks (optional) (rejmask= ) List of rejection masks (optional) (nrejmas= ) List of number rejected masks (optional) (expmask= ) List of exposure masks (optional) (sigmas = ) List of sigma images (optional) (imcmb = $I) Keyword for IMCMB keywords (logfile= STDOUT) Log file (combine= average) Type of combine operation (reject = ccdclip) Type of rejection (project= no) Project highest dimension of input images? (outtype= real) Output image pixel datatype (outlimi= ) Output limits (x1 x2 y1 y2 ...) (offsets= wcs) Input image offsets (masktyp= none) Mask type (maskval= 0) Mask value (blank = 0.) Value if there are no pixels (scale = none) Image scaling (zero = mode) Image zero point offset (weight = none) Image weights (statsec= [240:740,925:1325]) Image section for computing statistics (expname= ) Image header exposure time keyword (lthresh= INDEF) Lower threshold (hthresh= INDEF) Upper threshold (nlow = 2) minmax: Number of low pixels to reject (nhigh = 2) minmax: Number of high pixels to reject (nkeep = 1) Minimum to keep (pos) or maximum to reject (neg) (mclip = yes) Use median in sigma clipping algorithms? (lsigma = 3.) Lower sigma clipping factor (hsigma = 3.) Upper sigma clipping factor (rdnoise= 2.1) ccdclip: CCD readout noise (electrons) (gain = 2.87) ccdclip: CCD gain (electrons/DN) (snoise = 0) ccdclip: Sensitivity noise (fraction) (sigscal= 0.05) Tolerance for sigma clipping scaling corrections (pclip = -0.5) pclip: Percentile clipping parameter (grow = 7.) Radius (pixels) for neighbor rejection ---> n4214ha_comb, n4214r_comb, n4214oiii_comb,n4214v_comb