OSURC run Night 1: January 30, 2017 UT Begin with MODS in binocular mode Observers: Terndrup, Stierwalt, Liss, Wiens Telops: Gonzalez Huerta Image prefix: mods1b.20170130 mods1r.20170130 mods2b.20170130 mods2r.20170130 Sieve mask images (note incorrect prefix for mods2): mods1b.20170130.0001.fits mods1r.20170130.0001.fits mods2b.20170128.0027.fits mods2r.20170128.0027.fits At sunset, the sky is clear. Winds are about 6-7 m/s. UT 02:10 First target: spectrophotometric standard gl191-b2b. DIMM at acquisition 1.3. mods1b.20170130.0002 through 0004: G191-B2B dual grating mods1r.20170130.0004 through 0006 mods2b.20170130.0001 through 0003 mods2r.20170130.0004 through 0006 Seeing is soft. Collimation is OK on left side, but on right side the collimation needs to be adjusted. UT 02:45. Acquiring ND_Polar field. DIMM 1.1 - 1.3 variable. Used acquisition file pa90.acq UT 03:17. Starting spectra. Seeing is sometimes better than 1" but still variable. At UT 04:20, seeing got getting considerably worse for about a half hour. mods1b.20170130.0005 through 0034: css1111 mods1r.20170130.0014 through 0043 mods2b.20170130.0004 through 0033 mods2r.20170130.0012 through 0041 The time to execute the scripts is much longer for the 1r files than for any of the others. Sometimes the 1r readout hangs up at the end of and exposure with a message "Reading out..." but no action for 60 sec to 90 sec. UT 05:40: Sky is transparent but seeing is poor, so we are switching to lower priority objects that are brighter. UT 06:25: Have acquired ASASSN-14mz and are now observing. Seeing is 1.2 - 1.6" and variable. mods1b.20170130.0035 through 0037: ASASSN-14mz mods1r.20170130.0047 through 0049 mods2b.20170130.0034 through 0036 mods2r.20170130.0045 through 0047 UT 07:17: Acquiring UVa BCD J0926+4504. Start observing at 07:35. Seeing is steadily improving over its earlier state. Guider seeing is now 0.7 to 0.8". mods1b.20170130.0038 through 0039: BCD 0926+4504 mods1r.20170130.0053 through 0054 mods2b.20170130.0037 through 0038 mods2r.20170130.0051 through 0052 UT 08:15: Acquiring ASASSN-14li, start observing about 08:30. Seeing is now about 1". mods1b.20170130.0040 through 0042: ASASSN-14li mods1r.20170130.0058 through 0060 mods2b.20170130.0039 through 0041 mods2r.20170130.0056 through 0058 UT 09:30: Acquiring ASASSN-14lc, begin observing at 09:50. mods1b.20170130.0043 through 0046: ASASSN-14lc mods1r.20170130.0064 through 0067 mods2b.20170130.0042 through 0045 mods2r.20170130.0063 through 0066 UT 11:45: Acquiring ND-carbon/jy1706, using jy1706_pa180.acq Started at UT 11:55 mods1b.20170130.0047 through 0049: jy1706 mods1r.20170130.0071 through 0073 mods2b.20170130.0046 through 0048 mods2r.20170130.0070 through 0073 Ended with calibration star BD332642 mods1b.20170130.0050 through 0052: BD332642 mods1r.20170130.0076 through 0078 mods2b.20170130.0049 through 0051 mods2r.20170130.0075 through 0077 End of night calibrations: frame numbers type 1b 1r 2b 2r ------------------------------------------------------------------------- grlamps 53-55 79-81 52-54 78-80 grpixflats 56-65 82-86 55-64 81-85 slitflats 66-77 87-95 65-76 86-94 for 1.2 and 5.0 slits Olga Kuhn took some slit flats for the 0.6, 0.8, and 1.0 arcsec slits in the last day or so. These all have 20170128 dates. type 1b 1r 2b 2r ------------------------------------------------------------------------- 0.6 slit: 6-11 6-11 6-11 6-11 0.8 slit: 12-17 12-17 12-17 12-17 1.0 slit: 18-23 18-23 18-23 18-23 There is some feature in tonight's 2b image 52 at rows about 2450 all the way across the image (high counts > 30k). There will be more calibrations (biases and flats, etc.) on 20170131. Summary of slits used (all dual mode): gl191-B2B slitmask L60x6 css1111 (ND_polar) slitmask LS5x60x1.0 binned x2 in spatial direction ASASSN-14mz slitmask LS5x60x1.2 BCD 0926+4504 slitmask LS5x60x1.2 ASASSN-14li slitmask LS5x60x1.2 ASASSN-14lc slitmask LS5x60x1.2 ND_carbon/jy1706 slitmask LS5x60x0.6