Far-Ultraviolet Number Counts of Field Galaxies

The far-ultraviolet (FUV) number counts of galaxies constrain the evolution of the star-formation rate density of the universe. We report the FUV number counts computed from FUV imaging of several fields including the Hubble Ultra Deep Field, the Hubble Deep Field North, and small areas within the GOODS-North and -South fields. These data were obtained with the Hubble Space Telescope Solar Blind Channel of the Advance Camera for Surveys. The number counts sample a FUV AB magnitude range from 21-29 and cover a total area of 15.9 arcmin^2, ~4 times larger than the most recent HST FUV study. Our FUV counts intersect bright FUV GALEX counts at 22.5 mag and they show good agreement with recent semi-analytic models based on dark matter "merger trees" by Somerville et al. (2011). We show that the number counts are ~35% lower than in previous HST studies that use smaller areas. The differences between these studies are likely the result of cosmic variance; our new data cover more lines of sight and more area than previous HST FUV studies. The integrated light from field galaxies is found to contribute between 65.9 +/-8 - 82.6 +/-12 photons/s/cm^2/sr/angstrom to the FUV extragalactic background. These measurements set a lower limit for the total FUV background light.Comment: Accepted for publication in ApJ, including 34 pages, 6 figures, and 2 table

Far-Ultraviolet Number Counts on Field Galaxies

The far-ultraviolet (FUV) number counts of galaxies constrain the evolution of the star formation rate density of the universe. We report the FUV number counts computed from FUV imaging of several fields including the Hubble Ultra Deep Field, the Hubble Deep Field North, and small areas within the GOODS-North and South fields. These data were obtained with the Hubble Space Telescope (HST) Solar Blind Channel of the Advance Camera for Surveys. The number counts sample an FUV AB magnitude range from 21 to 29 and cover a total area of 15.9 arcmin^2, ~4 times larger than the most recent HST FUV study. Our FUV counts intersect bright FUV Galaxy Evolution Explorer counts at 22.5 mag and they show good agreement with recent semi-analytic models based on dark matter "merger trees" by R. S. Somerville et al. We show that the number counts are ~35% lower than in previous HST studies that use smaller areas. The differences between these studies are likely the result of cosmic variance; our new data cover more lines of sight and more area than previous HST FUV studies. The integrated light from field galaxies is found to contribute between 65.9^(+8)_(–8) and 82.6^(+12)_(–)12 photons s^(–1) cm^(–2) sr^(–1) Å^(–1) to the FUV extragalactic background. These measurements set a lower limit for the total FUV background light

Near-Ultraviolet Sources in the Hubble Ultra Deep Field: The Catalog

The catalog from the first high-resolution U-band image of the Hubble Ultra Deep Field, taken with Hubble's Wide-Field Planetary Camera 2 through the F300W filter, is presented. We detect 96 U-band objects and compare and combine this catalog with a Great Observatories Origins Deep Survey B-selected catalog that provides B, V, i, and z photometry, spectral types, and photometric redshifts. We have also obtained far-ultraviolet (FUV, 1614 Å) data with Hubble's Advanced Camera for Surveys Solar Blind Channel (ACS/SBC) and with GALEX. We detected 31 sources with ACS/SBC, 28 with GALEX/FUV, and 45 with GALEX/NUV. The methods of observations, image processing, object identification, catalog preparation, and catalog matching are presented

The Ursinus Weekly, February 12, 1934

Nick Nickols to play for Lorelei • Aerial travelogue delights audience • Frosh break even during past week • Grizzly grapplers meet F. & M. tomorrow • Grizzly courtmen drop two games • Lukens will speak to chem. group • Sunday school program planned for students • Synopsis of May Day pageants explained • Co-eds lose two games to Bryn Mawr lassies • New fraternity pledges announced by council • Derr and Stine register victories in dorm league • War is theme of vesper service in music studio • Grizzly grapplers meet F. & M. tomorrow • Schedule for inter-dorm court league completed • 1934 Ursinus grid schedule • Co-ed basketball team swamps Lebanon Valley • Men hold trial debate on the NRA question • Joint Christian associations open Lenten season Wed. • Glee Club gives concert at Schwenksville church • National isolation to be discussed by IRC • Prominent Ursinus alumnus dies suddenly at his home • Musical recital given by Dr. Goepp\u27s students • Brotherhood will give program at Roxboroughhttps://digitalcommons.ursinus.edu/weekly/2012/thumbnail.jp

The Ursinus Weekly, May 1, 1933

Junior prom features Miles\u27 radio artists • Installation tonight for new WSGA officers • College will entertain Huguenot Society of Pa. • Women\u27s student council dines at Freeland House • Bears lose three games during disastrous week • Muhlenberg College host to spring INA conclave • Junior play to present both thrills and comedy • Y officers installed at candle service • Grizzly runners to meet West Chester teachers • Grizzly netmen divide matches over week-end • College YM chorus presents concert at York • Juniors win annual inter-class track meet • Vesper services • New trees on campus • May Day and Mother\u27s Day scheduled for Sat., May 13 • English Club discusses George Bernard Shaw • Old-new Weekly staffs hold annual banquet • Second annual banquet of brotherhood on Tuesday • Fraternity elections held • Dr. Patten speaks to freshman discussion group • Music Club hears students • Penn psychologist speaks to Christian associations • Foreign students speak at YW international tea • Fircroft wins first game of girls baseball league • Tau Kappa Alpha to initiate • Ruby staff appointments announced by the editor • Curtain Club Zwing play to be Noel Coward hit • Yearling tossers open with three victorieshttps://digitalcommons.ursinus.edu/weekly/2054/thumbnail.jp

The Ursinus Weekly, November 27, 1933

Tickets to go on sale soon for Firebrand • Pre-medical society hears Dr. John Price • Bears tackle Albright in turkey day battle • Sophs trounce frosh in traditional game • All treasurers\u27 books audited by committee • Student council dance replaces formal ball • Station UCMC presents Ursinus musical program • Ursinus to meet Penn on gridiron next year • Soccer team drops final contest to Ardmore club • Bear courtmen respond to initial practice call • Dr. Omwake tells faculty members of summer trip • Radio debate to feature men debaters\u27 schedule • Ursinus hockeyites close season with 4-1 victory • Thanksgiving is subject of Sunday vesper service • Books on world problems placed in library by IRC • College host to reformed church ministerium conf. • Modern novels reviewed at English Club meeting • Varied program to be presented by IRC • Men\u27s Glee Club gives concert at Roxborough • French Club elects new officers at meeting • Soccer replaces football as inter-dorm. sporthttps://digitalcommons.ursinus.edu/weekly/2007/thumbnail.jp

The Ursinus Weekly, October 23, 1933

Bears upset F. & M., old rivals, 6-0 • Changes in rushing rules made operative by council • Ursinus represented at Dickinson\u27s celebration • Cross country runners lose to F. & M., 22-33 • Ursinus host to YMCA at district conference • I.N.A. convention will meet at Johns-Hopkins • Drexel eleven will be bear foe this Saturday • Prof. Brownback addresses YM on religion-science • Fourth straight win for Ursinus hockey team • Harriers to open home season against Temple • Y.W.C.A. and W.S.G.A. to sponsor mass meeting • Musical takes place of big-little sister party • Fraternity holds banquet • Women\u27s debating club stages humorous debate • Men debaters may organize four teams • Interesting freshman discussion group meetings • Rev. Lentz speaks at F. and M. pep meeting • Hall Chemical Society hears lecture on making pig iron • International Relations Club plans armistice day program • All Ruby proofs are to be returned this week • Ursinus leads in F. & M. serieshttps://digitalcommons.ursinus.edu/weekly/2002/thumbnail.jp

The Ursinus Weekly, September 18, 1933

Cyrus Curtis, benefactor of college, dies in June • 129 new students will register for coming year • McAvoy\u27s 1933 grid team points for Villanova • Ursinus coaching school pronounced huge success • Frosh busily engaged in week-end activities • Faculty strengthened by recent additions to staff • Complete orientation program for freshmen • Faculty members spend profitable vacations • Cross country practice will begin this week • New Deal planned this year by YM cabinet • New books for library reviewed by librarian • Soccer team to open campaign with Girard • Grizzly Gridder selected as football program titlehttps://digitalcommons.ursinus.edu/weekly/1997/thumbnail.jp

Spitzer Observations of the z=2.73 Lensed Lyman Break Galaxy, MS1512-cB58

We present Spitzer infrared (IR) photometry and spectroscopy of the lensed Lyman break galaxy (LBG), MS1512-cB58 at z=2.73. The large (factor ~30) magnification allows for the most detailed infrared study of an L*_UV(z=3) LBG to date. Broadband photometry with IRAC (3-10 micron), IRS (16 micron), and MIPS (24, 70 & 160 micron) was obtained as well as IRS spectroscopy spanning 5.5-35 microns. A fit of stellar population models to the optical/near-IR/IRAC photometry gives a young age (~9 Myr), forming stars at ~98 M_sun/yr, with a total stellar mass of ~10^9 M_sun formed thus far. The existence of an old stellar population with twice the stellar mass can not be ruled out. IR spectral energy distribution fits to the 24 and 70 micron photometry, as well as previously obtained submm/mm, data give an intrinsic IR luminosity L_IR = 1-2 x10^11 L_sun and a star formation rate, SFR ~20-40 M_sun/yr. The UV derived star formation rate (SFR) is ~3-5 times higher than the SFR determined using L_IR or L_Halpha because the red UV spectral slope is significantly over predicting the level of dust extinction. This suggests that the assumed Calzetti starburst obscuration law may not be valid for young LBGs. We detect strong line emission from Polycyclic Aromatic Hydrocarbons (PAHs) at 6.2, 7.7, and 8.6 microns. The line ratios are consistent with ratios observed in both local and high redshift starbursts. Both the PAH and rest-frame 8 micron luminosities predict the total L_IR based on previously measured relations in starbursts. Finally, we do not detect the 3.3 micron PAH feature. This is marginally inconsistent with some PAH emission models, but still consistent with PAH ratios measured in many local star-forming galaxies.Comment: Accepted for publication in ApJ. aastex format, 18 pages, 7 figure

NASA Light-Emitting Diodes for the Prevention of Oral Mucositis in Pediatric Bone Marrow Transplant Patients

Objective: The purpose of this study was to determine the effects of prophylactic near-infrared light therapy from light-emitting diodes (LEDs) in pediatric bone marrow transplant (BMT) recipients. Background Data: Oral mucositis (OM) is a frequent side effect of chemotherapy that leads to increased morbidity. Near-infrared light has been shown to produce biostimulatory effects in tissues, and previous results using nearinfrared lasers have shown improvement in OM indices. However, LEDs may hold greater potential for clinical applications. Materials and Methods: We recruited 32 consecutive pediatric patients undergoing myeloablative therapy in preparation for BMT. Patients were examined by two of three pediatric dentists trained in assessing the Schubert oral mucositis index (OMI) for left and right buccal and lateral tongue mucosal surfaces, while the patients were asked to rate their current left and right mouth pain, left and right xerostomia, and throat pain. LED therapy consisted of daily treatment at a fluence of 4 J/cm2 using a 670-nm LED array held to the left extraoral epithelium starting on the day of transplant, with a concurrent sham treatment on the right. Patients were assessed before BMT and every 2–3 days through posttransplant day 14. Outcomes included the percentage of patients with ulcerative oral mucositis (UOM) compared to historical epidemiological controls, the comparison of left and right buccal pain to throat pain, and the comparison between sides of the buccal and lateral tongue OMI and buccal pain. Results: The incidence of UOM was 53%, compared to an expected rate of 70–90%. There was also a 48% and 39% reduction of treated left and right buccal pain, respectively, compared to untreated throat pain at about posttransplant day 7 (p \u3c 0.05). There were no significant differences between sides in OMI or pain. Conclusion: Although more studies are needed, LED therapy appears useful in the prevention of OM in pediatric BMT patients