! $Id: 5320,v 6.1 1994/07/27 16:33:36 pepsa Exp $ coverpage: title_1: A NEW SIZE CONSTRAINT ON LYMAN ALPHA CLOUDS: CYCLE 4 MEDIUM sci_cat: QUASARS AND AGN sci_subcat: QUASAR ABSORPTION proposal_for: GO pi_fname: CRAIG pi_mi: B. pi_lname: FOLTZ pi_inst: MULTIPLE MIRROR TELESCOPE pi_country: USA pi_phone: 602-621-1269 hours_pri: 16.96 num_pri: 6 fos: Y off_fname: MICHAEL off_lname: CUSANOVICH off_title: V.P. FOR RESEARCH off_inst: UNIVERSITY OF ARIZONA off_addr_1: ADMINISTRATION BLDG 601 off_addr_2: UNIVERSITY OF ARIZONA off_city: TUCSON off_state: AZ off_zip: 85721 off_country: USA off_phone: 602-621-3513 ! end of coverpage abstract: line_1: Although they have been the target of extensive ground- and space-based line_2: investigations as well as intense theoretical modelling, the physical nature line_3: of the absorbing clouds responsible for the Lyman alpha forest of absorption line_4: seen shortward of 1215 A in the rest frame of all QSOs remains elusive. Optical line_5: and UV data have yielded column density, Doppler parameter, and redshift line_6: distributions, but the determination of gas density and ionization fractions line_7: requires a knowledge of the size of the absorber. Ground-based constraints line_8: derived from observations of gravitationally-lensed and projected pairs of line_9: QSOs allow for a wide range of sizes: 10 kpc < r < 1 Mpc. We propose to line_10: observe three relatively bright, intermediate-redshift pairs of QSOs, with line_11: separations on the sky of roughly an arcminute to search for common Lyman alpha line_12: forest lines in the redshift range from 0.35 to 1.7. Numerical simulations line_13: show that these observations will be sensitive to cloud sizes greater than line_14: about 100 kpc. If the characteristic size of the clouds is in the range from line_15: 100 kpc to 1 Mpc an estimate of the size will result from the fraction of line_16: absorption lines common along two nearby lines of sight. In the case of no line_17: common features, the upper limit on the size of the clouds will be reduced by line_18: more than a factor of 4. ! ! end of abstract general_form_proposers: lname: FOLTZ fname: CRAIG mi: B. inst: 1216 country: USA ! lname: IMPEY fname: CHRIS mi: D. inst: 1212 country: USA ! lname: DINSHAW fname: NADINE inst: 1212 country: USA ! ! end of general_form_proposers block general_form_text: question: 3 section: 1 line_1: Three pairs of quasars will be observed with the red side of the FOS. The line_2: G190H and G270H gratings will give spectral coverage from 1650-3280 A, line_3: corresponding to 0.35 < z < 1.7 for Lyman-alpha absorbers. The two high line_4: redshift pairs will be observed with both the G190H and G270H gratings, and line_5: the lower redshift pair with just the G190H grating. All six targets can line_6: be acquired in ACQ/BINARY mode with the large 4.3 arcsecond aperture and line_7: the observations will be made in the 0.9 arcsecond circular aperture. One line_8: internal wavelength calibration frame will be acquired at both gratings for line_9: the high-z quasars and at only the G190H grating for the lower-z quasars. line_11: The integration times are scaled to yield a SNR per diode of about 50 which line_12: gives a better than 5 sigma equivalent width limit for unresolved absorption line_13: lines of 0.3 A at 2300 A for the G190H observations and at 2650 A for G270H. line_14: A 0.3 A equivalent width line will be detected at greater than 3 sigma line_15: everywhere in the G270H spectra and longward of 1650 A in the G190H spectra. line_16: Shortward of 1650 A in the G190H spectra, such a line will fall below 3-sigma line_17: significance. The quoted SNRs are estimated from the observed V magnitudes by line_18: assuming a power law slope of nu^-1. ! question: 4 section: 1 line_1: This observation requires the ultraviolet spectroscopic capability of line_2: the HST. Ground-based observations of Lyman-alpha absoprtion lines are line_3: only possible for redshifts above z = 1.7. Since the quasars have line_4: redshifts up to z = 2, we plan ground-based spectroscopy using the line_5: Multiple Mirror Telescope to augment the HST data (the ground-based line_6: data will also be essential in weeding out metal lines from the line_7: relatively small number of Lyman-alpha lines). However, most of the line_8: path length to absorption, and most of the expected absorbers, are at line_9: wavelengths below 3200 Angstroms that can only be studied by HST. Also, line_10: it is by no means clear that the high and low redshift Lyman-alpha line_11: absorbers represent the same kind of object. There is some indication line_12: that the slope of dN/dz flattens below z = 1.5. Therefore a new line_13: constraint on the sizes of low redshift Lyman-alpha clouds is desirable line_14: independent of ground-based data. We also note that this observation is line_15: complementary to the scientific goals of the Quasars Key Project. The line_16: Key Project will eventually have enough absorbers to calculate whether line_17: Lyman-alpha clouds cluster in the same way as galaxies at low redshift. line_18: The use of pairs, however, gives size information that cannot be line_19: obtained either from a 2-point correlation function or from an line_20: autocorrelation function along a single line of sight. ! question: 6 section: 1 line_1: The success of this proposal relies on whether the absorption features of line_2: one quasar can be unambiguously identified as being common (or not) to line_3: those of the other quasar in a pair. This demands accurate calibration of line_4: the zero point of the wavelength scale within a pair. According to Papers I line_5: and II of the HST Quasar Absorption Line Key Project, the rms scatter in line_6: the zero point is about 0.5 A in the G190H and G270H gratings. The offsets line_7: can be determined from the Galactic absorption lines, however in calibrating line_8: the G190H spectra only the Al II 1670 line is suitable and is not always well line_9: detected (Paper II, preprint, p9). Therefore one wavelength calibration line_10: frame following an exposure at each grating for each of the quasars is line_11: required. We will not need a calibration frame for every exposure because line_12: the relative zero-point shifts between exposures of a given quasar can be line_13: calculated by cross-correlating the individual exposures of that quasar. ! ! question: 9 section: 1 line_1: Previous HST observing time awarded us is as follows: line_2: GO Program 2524 "Spectropolarimetry of Bright Quasars" - IMPEY line_3: GO Program 3732 "Spectropolarimetry of Bright Quasars" - IMPEY line_4: GO Program 3648 "Imaging of BL Lac Host Galaxies and Environments" - IMPEY line_5: GO Program 4402 "A Study of the Gravitational Lens 1422+321" - IMPEY, FOLTZ line_6: Papers on the results of GO Programs 2524 and 3732 are in preparation. The data line_7: from GO Program 3648 have been received and are being reduced. The observations line_8: for GO Program 4402 have not yet been made. ! question: 10 section: 1 line_1: The University of Arizona will provide central computing services (hard disks, line_2: networks, tape drives) in support of this project. One undergraduate will be line_3: able to work on this project. We will also be supported by the University of line_4: Arizona and the Smithsonian Institution in follow-up ground-based spectroscopy line_5: spectroscopy of the quasar pairs using the Multiple Mirror Telescope. ! !end of general form text general_form_address: lname: FOLTZ fname: CRAIG mi: B. category: PI inst: 1216 addr_1: MMT OBSERVATORY addr_2: UNIVERSITY OF ARIZONA city: TUCSON state: AZ zip: 85721 country: USA phone: 602-621-1269 telex: 602-670-5740 ! lname: category: CON ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: PKS0254-334 name_2: Q0254-334A descr_1: E,313 pos_1: PLATE-ID = 02IV, pos_2: RA = 02H 56M 42.490S +/- 1.0", pos_3: DEC = -33D 15' 25.26" +/- 1.0" equinox: J2000.0 rv_or_z: Z=1.915 comment_1: COMPONENT A OF comment_2: QUASAR PAIR Q0254-334A AND B fluxnum_1: 1 fluxval_1: V=17.0 ! targnum: 2 name_1: Q0254-334 name_2: Q0254-334B descr_1: E,313 pos_1: PLATE-ID = 02IV, pos_2: RA = 02H 56M 47.777S +/- 1.0", pos_3: DEC = -33D 15' 27.52" +/- 1.0" equinox: J2000.0 rv_or_z: Z=1.863 comment_1: COMPONENT B OF comment_2: QUASAR PAIR Q0254-334A AND B fluxnum_1: 1 fluxval_1: V=16.5 ! targnum: 3 name_1: Q0107-025A name_2: PB8553 descr_1: E,313 pos_1: PLATE-ID = 00WM, pos_2: RA = 01H 10M 13.146S +/- 1.0", pos_3: DEC = -02D 19' 54.05" +/- 1.0" equinox: J2000.0 rv_or_z: Z=0.956 comment_1: COMPONENT A OF comment_2: QUASAR PAIR Q0107-025A AND B fluxnum_1: 1 fluxval_1: V=18.2 ! targnum: 4 name_1: Q0107-025B name_2: PB6291 descr_1: E,313 pos_1: PLATE-ID = 00WM, pos_2: RA = 01H 10M 16.316S +/- 1.0", pos_3: DEC = -02D 18' 52.81" +/- 1.0" equinox: J2000.0 rv_or_z: Z=0.952 comment_1: COMPONENT B OF comment_2: QUASAR PAIR Q0107-025A AND B fluxnum_1: 1 fluxval_1: V=17.4 ! targnum: 5 name_1: LB9605 descr_1: E,313 pos_1: PLATE-ID = 027J, pos_2: RA = 15H 19M 13.41S +/- 1.0", pos_3: DEC = +23D 46' 57.4" +/- 1.0" equinox: J2000.0 rv_or_z: Z=1.834 comment_1: QUASAR PAIR LB9605 AND LB9612 fluxnum_1: 1 fluxval_1: V=18.4 ! targnum: 6 name_1: LB9612 descr_1: E,313 pos_1: PLATE-ID = 027J, pos_2: RA = 15H 19M 19.452S +/- 1.0", pos_3: DEC = +23D 46' 01.47" +/- 1.0" equinox: J2000.0 rv_or_z: Z=1.898 comment_1: QUASAR PAIR LB9605 AND LB9612 fluxnum_1: 1 fluxval_1: V=17.3 ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 1.000 targname: PKS0254-334 config: FOS/RD opmode: ACQ/BINARY aperture: 4.3 sp_element: MIRROR num_exp: 1 time_per_exp: 13.9S s_to_n: 20 fluxnum_1: 1 priority: 1 req_1: CYCLE 4 / 1-7 ; ONBOARD ACQ FOR 2-7 ! linenum: 2.000 targname: PKS0254-334 config: FOS/RD opmode: ACCUM aperture: 1.0 sp_element: G190H wavelength: 1565-2312 num_exp: 1 time_per_exp: 35M s_to_n: 50 fluxnum_1: 1 priority: 1 ! linenum: 3.000 targname: PKS0254-334 config: FOS/RD opmode: ACCUM aperture: 1.0 sp_element: G190H wavelength: 1565-2312 num_exp: 1 time_per_exp: 35M s_to_n: 50 fluxnum_1: 1 priority: 1 ! linenum: 4.000 targname: WAVE config: FOS/RD opmode: ACCUM aperture: 1.0 sp_element: G190H wavelength: 1565-2312 num_exp: 1 time_per_exp: DEF priority: 1 req_1: CALIB FOR 3 NO SLEW ; GROUP 3-4 NO GAP comment_1: DO NOT CHANGE GRATING POSITION BETWEEN comment_2: EXPOSURES 3 AND 4 ! linenum: 5.000 targname: PKS0254-334 config: FOS/RD opmode: ACCUM aperture: 1.0 sp_element: G270H wavelength: 2223-3278 num_exp: 1 time_per_exp: 24M s_to_n: 50 fluxnum_1: 1 priority: 1 ! linenum: 6.000 targname: PKS0254-334 config: FOS/RD opmode: ACCUM aperture: 1.0 sp_element: G270H wavelength: 2223-3278 num_exp: 1 time_per_exp: 24M s_to_n: 50 fluxnum_1: 1 priority: 1 ! linenum: 7.000 targname: WAVE config: FOS/RD opmode: ACCUM aperture: 1.0 sp_element: G270H wavelength: 2223-3278 num_exp: 1 time_per_exp: DEF priority: 1 req_1: CALIB FOR 6 NO SLEW ; GROUP 6-7 NO GAP comment_1: DO NOT CHANGE GRATING POSITION BETWEEN comment_2: EXPOSURES 6 AND 7 ! linenum: 8.000 targname: Q0254-334 config: FOS/RD opmode: ACQ/BINARY aperture: 4.3 sp_element: MIRROR num_exp: 1 time_per_exp: 8.8S s_to_n: 20 fluxnum_1: 1 priority: 1 req_1: CYCLE 4 / 8-13 ; ONBOARD ACQ FOR 9-13 ! linenum: 9.000 targname: Q0254-334 config: FOS/RD opmode: ACCUM aperture: 1.0 sp_element: G190H wavelength: 1565-2312 num_exp: 1 time_per_exp: 23M s_to_n: 50 fluxnum_1: 1 priority: 1 ! linenum: 10.000 targname: Q0254-334 config: FOS/RD opmode: ACCUM aperture: 1.0 sp_element: G190H wavelength: 1565-2312 num_exp: 1 time_per_exp: 23M s_to_n: 50 fluxnum_1: 1 priority: 1 ! linenum: 11.000 targname: WAVE config: FOS/RD opmode: ACCUM aperture: 1.0 sp_element: G190H wavelength: 1565-2312 num_exp: 1 time_per_exp: DEF priority: 1 req_1: CALIB FOR 10 NO SLEW ; GROUP 10-11 NO GAP comment_1: DO NOT CHANGE GRATING POSITION BETWEEN comment_2: EXPOSURES 10 AND 11 ! linenum: 12.000 targname: Q0254-334 config: FOS/RD opmode: ACCUM aperture: 1.0 sp_element: G270H wavelength: 2223-3278 num_exp: 1 time_per_exp: 28M s_to_n: 50 fluxnum_1: 1 priority: 1 ! linenum: 13.000 targname: WAVE config: FOS/RD opmode: ACCUM aperture: 1.0 sp_element: G270H wavelength: 2223-3278 num_exp: 1 time_per_exp: DEF priority: 1 req_1: CALIB FOR 12 NO SLEW ; GROUP 12-13 NO GAP comment_1: DO NOT CHANGE GRATING POSITION BETWEEN comment_2: EXPOSURES 12 AND 13 ! linenum: 14.000 targname: Q0107-025A config: FOS/RD opmode: ACQ/BINARY aperture: 4.3 sp_element: MIRROR num_exp: 1 time_per_exp: 41.9S s_to_n: 20 fluxnum_1: 1 priority: 1 req_1: CYCLE 4 / 14-21 ; ONBOARD ACQ FOR 15-21 ! linenum: 15.000 targname: Q0107-025A config: FOS/RD opmode: ACCUM aperture: 1.0 sp_element: G190H wavelength: 1565-2312 num_exp: 1 time_per_exp: 37M s_to_n: 50 fluxnum_1: 1 priority: 1 ! linenum: 16.000 targname: Q0107-025A config: FOS/RD opmode: ACCUM aperture: 1.0 sp_element: G190H wavelength: 1565-2312 num_exp: 1 time_per_exp: 37M s_to_n: 50 fluxnum_1: 1 priority: 1 ! linenum: 17.000 targname: Q0107-025A config: FOS/RD opmode: ACCUM aperture: 1.0 sp_element: G190H wavelength: 1565-2312 num_exp: 1 time_per_exp: 37M s_to_n: 50 fluxnum_1: 1 priority: 1 ! linenum: 18.000 targname: Q0107-025A config: FOS/RD opmode: ACCUM aperture: 1.0 sp_element: G190H wavelength: 1565-2312 num_exp: 1 time_per_exp: 37M s_to_n: 50 fluxnum_1: 1 priority: 1 ! linenum: 19.000 targname: Q0107-025A config: FOS/RD opmode: ACCUM aperture: 1.0 sp_element: G190H wavelength: 1565-2312 num_exp: 1 time_per_exp: 37M s_to_n: 50 fluxnum_1: 1 priority: 1 ! linenum: 20.000 targname: Q0107-025A config: FOS/RD opmode: ACCUM aperture: 1.0 sp_element: G190H wavelength: 1565-2312 num_exp: 1 time_per_exp: 37M s_to_n: 50 fluxnum_1: 1 priority: 1 ! linenum: 21.000 targname: WAVE config: FOS/RD opmode: ACCUM aperture: 1.0 sp_element: G190H wavelength: 1565-2312 num_exp: 1 time_per_exp: DEF priority: 1 req_1: CALIB FOR 20 NO SLEW ; GROUP 20-21 NO GAP comment_1: DO NOT CHANGE GRATING POSITION BETWEEN comment_2: EXPOSURES 20 AND 21 ! linenum: 22.000 targname: Q0107-025B config: FOS/RD opmode: ACQ/BINARY aperture: 4.3 sp_element: MIRROR num_exp: 1 time_per_exp: 20.1S s_to_n: 20 fluxnum_1: 1 priority: 1 req_1: CYCLE 4 / 22-26 ; ONBOARD ACQ FOR 23-26 ! linenum: 23.000 targname: Q0107-025B config: FOS/RD opmode: ACCUM aperture: 1.0 sp_element: G190H wavelength: 1565-2312 num_exp: 1 time_per_exp: 36M s_to_n: 50 fluxnum_1: 1 priority: 1 ! linenum: 24.000 targname: Q0107-025B config: FOS/RD opmode: ACCUM aperture: 1.0 sp_element: G190H wavelength: 1565-2312 num_exp: 1 time_per_exp: 36M s_to_n: 50 fluxnum_1: 1 priority: 1 ! linenum: 25.000 targname: Q0107-025B config: FOS/RD opmode: ACCUM aperture: 1.0 sp_element: G190H wavelength: 1565-2312 num_exp: 1 time_per_exp: 36M s_to_n: 50 fluxnum_1: 1 priority: 1 ! linenum: 26.000 targname: WAVE config: FOS/RD opmode: ACCUM aperture: 1.0 sp_element: G190H wavelength: 1565-2312 num_exp: 1 time_per_exp: DEF priority: 1 req_1: CALIB FOR 25 NO SLEW ; GROUP 25-26 NO GAP comment_1: DO NOT CHANGE GRATING POSITION BETWEEN comment_2: EXPOSURES 25 AND 26 ! linenum: 27.000 targname: LB9612 config: FOS/RD opmode: ACQ/BINARY aperture: 4.3 sp_element: MIRROR num_exp: 1 time_per_exp: 18.3S s_to_n: 20 fluxnum_1: 1 priority: 1 req_1: CYCLE 4 / 27-34 ; ONBOARD ACQ FOR 28-34 ! linenum: 28.000 targname: LB9612 config: FOS/RD opmode: ACCUM aperture: 1.0 sp_element: G190H wavelength: 1565-2312 num_exp: 1 time_per_exp: 27M s_to_n: 45 fluxnum_1: 1 priority: 1 ! linenum: 29.000 targname: LB9612 config: FOS/RD opmode: ACCUM aperture: 1.0 sp_element: G190H wavelength: 1565-2312 num_exp: 1 time_per_exp: 27M s_to_n: 45 fluxnum_1: 1 priority: 1 ! linenum: 30.000 targname: LB9612 config: FOS/RD opmode: ACCUM aperture: 1.0 sp_element: G190H wavelength: 1565-2312 num_exp: 1 time_per_exp: 27M s_to_n: 45 fluxnum_1: 1 priority: 1 ! linenum: 31.000 targname: WAVE config: FOS/RD opmode: ACCUM aperture: 1.0 sp_element: G190H wavelength: 1565-2312 num_exp: 1 time_per_exp: DEF s_to_n: 20 fluxnum_1: 1 priority: 1 req_1: CALIB FOR 30 NO SLEW ; GROUP 30-31 NO GAP comment_1: DO NOT CHANGE GRATING POSITION BETWEEN comment_2: EXPOSURES 30 AND 31 ! linenum: 32.000 targname: LB9612 config: FOS/RD opmode: ACCUM aperture: 1.0 sp_element: G270H wavelength: 2223-3278 num_exp: 1 time_per_exp: 25M s_to_n: 45 fluxnum_1: 1 priority: 1 ! linenum: 33.000 targname: LB9612 config: FOS/RD opmode: ACCUM aperture: 1.0 sp_element: G270H wavelength: 2223-3278 num_exp: 1 time_per_exp: 25M s_to_n: 45 fluxnum_1: 1 priority: 1 ! linenum: 34.000 targname: WAVE config: FOS/RD opmode: ACCUM aperture: 1.0 sp_element: G270H wavelength: 2223-3278 num_exp: 1 time_per_exp: DEF priority: 1 req_1: CALIB FOR 33 NO SLEW ; GROUP 33-34 NO GAP comment_1: DO NOT CHANGE GRATING POSITION BETWEEN comment_2: EXPOSURES 33 AND 34 ! linenum: 35.000 targname: LB9605 config: FOS/RD opmode: ACQ/BINARY aperture: 4.3 sp_element: MIRROR num_exp: 1 time_per_exp: 50.3S s_to_n: 20 fluxnum_1: 1 priority: 1 req_1: CYCLE 4 / 35-47 ; ONBOARD ACQ FOR 36-42 ! linenum: 36.000 targname: LB9605 config: FOS/RD opmode: ACCUM aperture: 1.0 sp_element: G190H wavelength: 1565-2312 num_exp: 1 time_per_exp: 37M s_to_n: 45 fluxnum_1: 1 priority: 1 ! linenum: 37.000 targname: LB9605 config: FOS/RD opmode: ACCUM aperture: 1.0 sp_element: G190H wavelength: 1565-2312 num_exp: 1 time_per_exp: 37M s_to_n: 45 fluxnum_1: 1 priority: 1 ! linenum: 38.000 targname: LB9605 config: FOS/RD opmode: ACCUM aperture: 1.0 sp_element: G190H wavelength: 1565-2312 num_exp: 1 time_per_exp: 37M s_to_n: 45 fluxnum_1: 1 priority: 1 ! linenum: 39.000 targname: LB9605 config: FOS/RD opmode: ACCUM aperture: 1.0 sp_element: G190H wavelength: 1565-2312 num_exp: 1 time_per_exp: 37M s_to_n: 45 fluxnum_1: 1 priority: 1 ! linenum: 40.000 targname: LB9605 config: FOS/RD opmode: ACCUM aperture: 1.0 sp_element: G190H wavelength: 1565-2312 num_exp: 1 time_per_exp: 37M s_to_n: 45 fluxnum_1: 1 priority: 1 ! linenum: 41.000 targname: LB9605 config: FOS/RD opmode: ACCUM aperture: 1.0 sp_element: G190H wavelength: 1565-2312 num_exp: 1 time_per_exp: 37M s_to_n: 45 fluxnum_1: 1 priority: 1 ! linenum: 42.000 targname: WAVE config: FOS/RD opmode: ACCUM aperture: 1.0 sp_element: G190H wavelength: 1565-2312 num_exp: 1 time_per_exp: DEF priority: 1 req_1: CALIB FOR 41 NO SLEW ; GROUP 41-42 NO GAP comment_1: DO NOT CHANGE GRATING POSITION BETWEEN comment_2: EXPOSURES 41 AND 42 ! linenum: 43.000 targname: LB9605 config: FOS/RD opmode: ACQ/BINARY aperture: 4.3 sp_element: MIRROR num_exp: 1 time_per_exp: 50.3S s_to_n: 20 fluxnum_1: 1 priority: 1 req_1: ONBOARD ACQ FOR 43.1-47 ! linenum: 43.100 targname: LB9605 config: FOS/RD opmode: ACCUM aperture: 1.0 sp_element: G270H wavelength: 2223-3278 num_exp: 1 time_per_exp: 35M s_to_n: 45 fluxnum_1: 1 priority: 1 ! linenum: 44.000 targname: LB9605 config: FOS/RD opmode: ACCUM aperture: 1.0 sp_element: G270H wavelength: 2223-3278 num_exp: 1 time_per_exp: 35M s_to_n: 45 fluxnum_1: 1 priority: 1 ! linenum: 45.000 targname: LB9605 config: FOS/RD opmode: ACCUM aperture: 1.0 sp_element: G270H wavelength: 2223-3278 num_exp: 1 time_per_exp: 35M s_to_n: 45 fluxnum_1: 1 priority: 1 ! linenum: 46.000 targname: LB9605 config: FOS/RD opmode: ACCUM aperture: 1.0 sp_element: G270H wavelength: 2223-3278 num_exp: 1 time_per_exp: 35M s_to_n: 45 fluxnum_1: 1 priority: 1 ! linenum: 47.000 targname: WAVE config: FOS/RD opmode: ACCUM aperture: 1.0 sp_element: G270H wavelength: 2223-3278 num_exp: 1 time_per_exp: DEF priority: 1 req_1: CALIB FOR 46 NO SLEW ; GROUP 46-47 NO GAP comment_1: DO NOT CHANGE GRATING POSITION BETWEEN comment_2: EXPOSURES 46 AND 47 ! ! end of exposure logsheet ! No scan data records found