Effects of transients in LIGO suspensions on searches for gravitational waves
This paper presents an analysis of the transient behavior of the Advanced LIGO (Laser Interferometer Gravitational-wave Observatory) suspensions used to seismically isolate the optics. We have characterized the transients in the longitudinal motion of the quadruple suspensions during Advanced LIGO&#...
| Main Authors: | , , , , , , , , , , , , , , , , , |
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| Format: | Article |
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AIP Publishing
2019
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| Online Access: | https://hdl.handle.net/1721.1/121208 |
| _version_ | 1826210696258387968 |
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| author | Barsotti, Lisa Biscans, Sebastien Evans, M. Fernandez Galiana, Alvaro-Miguel Fritschel, Peter K. Gras, Slawomir MacInnis, Myron E. Martynov, Denis Mason, K. Matichard, Fabrice Mavalvala, Nergis Miller, John Mittleman, Richard K Shoemaker, David H Weiss, Rainer Yu, Hang Yu, Haocun Zucker, Michael E |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Barsotti, Lisa Biscans, Sebastien Evans, M. Fernandez Galiana, Alvaro-Miguel Fritschel, Peter K. Gras, Slawomir MacInnis, Myron E. Martynov, Denis Mason, K. Matichard, Fabrice Mavalvala, Nergis Miller, John Mittleman, Richard K Shoemaker, David H Weiss, Rainer Yu, Hang Yu, Haocun Zucker, Michael E |
| author_sort | Barsotti, Lisa |
| collection | MIT |
| description | This paper presents an analysis of the transient behavior of the Advanced LIGO (Laser Interferometer Gravitational-wave Observatory) suspensions used to seismically isolate the optics. We have characterized the transients in the longitudinal motion of the quadruple suspensions during Advanced LIGO's first observing run. Propagation of transients between stages is consistent with modeled transfer functions, such that transient motion originating at the top of the suspension chain is significantly reduced in amplitude at the test mass. We find that there are transients seen by the longitudinal motion monitors of quadruple suspensions, but they are not significantly correlated with transient motion above the noise floor in the gravitational wave strain data, and therefore do not present a dominant source of background noise in the searches for transient gravitational wave signals. Using the suspension transfer functions, we compared the transients in a week of gravitational wave strain data with transients from a quadruple suspension. Of the strain transients between 10 and 60 Hz, 84% are loud enough that they would have appeared above the sensor noise in the top stage quadruple suspension monitors if they had originated at that stage at the same frequencies. We find no significant temporal correlation with the suspension transients in that stage, so we can rule out suspension motion originating at the top stage as the cause of those transients. However, only 3.2% of the gravitational wave strain transients are loud enough that they would have been seen by the second stage suspension sensors, and none of them are above the sensor noise levels of the penultimate stage. Therefore, we cannot eliminate the possibility of transient noise in the detectors originating in the intermediate stages of the suspension below the sensing noise. |
| first_indexed | 2024-09-23T14:53:43Z |
| format | Article |
| id | mit-1721.1/121208 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T14:53:43Z |
| publishDate | 2019 |
| publisher | AIP Publishing |
| record_format | dspace |
| spelling | mit-1721.1/1212082020-12-12T02:15:26Z Effects of transients in LIGO suspensions on searches for gravitational waves Barsotti, Lisa Biscans, Sebastien Evans, M. Fernandez Galiana, Alvaro-Miguel Fritschel, Peter K. Gras, Slawomir MacInnis, Myron E. Martynov, Denis Mason, K. Matichard, Fabrice Mavalvala, Nergis Miller, John Mittleman, Richard K Shoemaker, David H Weiss, Rainer Yu, Hang Yu, Haocun Zucker, Michael E Massachusetts Institute of Technology. Department of Physics MIT Kavli Institute for Astrophysics and Space Research This paper presents an analysis of the transient behavior of the Advanced LIGO (Laser Interferometer Gravitational-wave Observatory) suspensions used to seismically isolate the optics. We have characterized the transients in the longitudinal motion of the quadruple suspensions during Advanced LIGO's first observing run. Propagation of transients between stages is consistent with modeled transfer functions, such that transient motion originating at the top of the suspension chain is significantly reduced in amplitude at the test mass. We find that there are transients seen by the longitudinal motion monitors of quadruple suspensions, but they are not significantly correlated with transient motion above the noise floor in the gravitational wave strain data, and therefore do not present a dominant source of background noise in the searches for transient gravitational wave signals. Using the suspension transfer functions, we compared the transients in a week of gravitational wave strain data with transients from a quadruple suspension. Of the strain transients between 10 and 60 Hz, 84% are loud enough that they would have appeared above the sensor noise in the top stage quadruple suspension monitors if they had originated at that stage at the same frequencies. We find no significant temporal correlation with the suspension transients in that stage, so we can rule out suspension motion originating at the top stage as the cause of those transients. However, only 3.2% of the gravitational wave strain transients are loud enough that they would have been seen by the second stage suspension sensors, and none of them are above the sensor noise levels of the penultimate stage. Therefore, we cannot eliminate the possibility of transient noise in the detectors originating in the intermediate stages of the suspension below the sensing noise. 2019-06-05T14:45:10Z 2019-06-05T14:45:10Z 2019-03-20T17:49:28Z Article http://purl.org/eprint/type/JournalArticle 0034-6748 1089-7623 https://hdl.handle.net/1721.1/121208 Walker, M. et al. “Effects of Transients in LIGO Suspensions on Searches for Gravitational Waves.” Review of Scientific Instruments 88, 12 (December 2017): 124501 © The Author(s) http://dx.doi.org/10.1063/1.5000264 Review of Scientific Instruments http://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf AIP Publishing arXiv |
| spellingShingle | Barsotti, Lisa Biscans, Sebastien Evans, M. Fernandez Galiana, Alvaro-Miguel Fritschel, Peter K. Gras, Slawomir MacInnis, Myron E. Martynov, Denis Mason, K. Matichard, Fabrice Mavalvala, Nergis Miller, John Mittleman, Richard K Shoemaker, David H Weiss, Rainer Yu, Hang Yu, Haocun Zucker, Michael E Effects of transients in LIGO suspensions on searches for gravitational waves |
| title | Effects of transients in LIGO suspensions on searches for gravitational waves |
| title_full | Effects of transients in LIGO suspensions on searches for gravitational waves |
| title_fullStr | Effects of transients in LIGO suspensions on searches for gravitational waves |
| title_full_unstemmed | Effects of transients in LIGO suspensions on searches for gravitational waves |
| title_short | Effects of transients in LIGO suspensions on searches for gravitational waves |
| title_sort | effects of transients in ligo suspensions on searches for gravitational waves |
| url | https://hdl.handle.net/1721.1/121208 |
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