We report on an all-sky search for periodic gravitational waves in the frequency range 50-1000 Hz with the first derivative of frequency in the range −8.9 × 10−10 Hz s−1 to zero in two years of data ...collected during LIGO's fifth science run. Our results employ a Hough transform technique, introducing a χ2 test and analysis of coincidences between the signal levels in years 1 and 2 of observations that offers a significant improvement in the product of strain sensitivity with compute cycles per data sample compared to previously published searches. Since our search yields no surviving candidates, we present results taking the form of frequency dependent, 95% confidence upper limits on the strain amplitude h0. The most stringent upper limit from year 1 is 1.0 × 10−24 in the 158.00-158.25 Hz band. In year 2, the most stringent upper limit is 8.9 × 10−25 in the 146.50-146.75 Hz band. This improved detection pipeline, which is computationally efficient by at least two orders of magnitude better than our flagship Einstein@Home search, will be important for 'quick-look' searches in the Advanced LIGO and Virgo detector era.
The use of complementary and alternative therapies for depression is an issue of growing interest for practitioners who care for women. Postpartum depression is a serious and debilitating illness ...that affects many women, their infants, and families. Often, women do not report feelings of sadness or depression to their health care providers due to stigma. Some women have multiple concerns in using prescription drugs, especially if they are breastfeeding their infants. In addition, more women are educating themselves about the potential side and adverse effects of prescriptions drugs and are exploring complementary and alternative therapies. With the availability of information from multiple sources, whether accurate or not, women may be using these therapies inappropriately. Two major concerns in using complementary and alternative therapies are the purity and safety of the herbs and herbal formulations and the potential lack of communication between the client and health care provider.
Detector characterization in GEO 600 Sintes, A M; Aufmuth, P; Aulbert, C ...
Classical and quantum gravity,
09/2003, Volume:
20, Issue:
17
Journal Article
We present the results of the first search for gravitational wave bursts associated with high energy neutrinos. Together, these messengers could reveal new, hidden sources that are not observed by ...conventional photon astronomy, particularly at high energy. Our search uses neutrinos detected by the underwater neutrino telescope ANTARES in its 5 line configuration during the period January - September 2007, which coincided with the fifth and first science runs of LIGO and Virgo, respectively. The LIGO-Virgo data were analysed for candidate gravitational-wave signals coincident in time and direction with the neutrino events. No significant coincident events were observed. We place limits on the density of joint high energy neutrino - gravitational wave emission events in the local universe, and compare them with densities of merger and core-collapse events.
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