Matches in SemOpenAlex for { <https://semopenalex.org/work/W3099765112> ?p ?o ?g. }
Showing items 1 to 84 of
84
with 100 items per page.
- W3099765112 endingPage "166" @default.
- W3099765112 startingPage "153" @default.
- W3099765112 abstract "Since the persuasive determination of the time delay in Q0957+561, much interest has centered around shifting and subtracting the A and B light curves to look for residuals due to microlensing. Solar mass objects in the lens galaxy produce variations on timescales of decades, with amplitudes of a few tenths of a magnitude, but MACHOs (with masses of order 10-3-10-7 M☉) produce variations at only the 5% level. To detect such small variations, highly precise photometry is required. To that end, we have used 150 observations over three nights to examine the effects of seeing on the light curves. We have determined that seeing itself can be responsible for correlated 5% variations in the light curves of A and B, which could masquerade as microlensing events. We have found, however, that these effects can be accurately removed by subtracting the light from the lens galaxy and by correcting for cross contamination of light between the closely juxtaposed A and B images. We find that these corrections improve the variations due to seeing from 5% to a level on the order of the photon shot noise (0.5%). We also find that this corrected aperture photometry method is more reliable at removing the errors due to seeing than is a direct implementation of point-spread function fitting photometry." @default.
- W3099765112 created "2020-11-23" @default.
- W3099765112 creator A5026057032 @default.
- W3099765112 creator A5061642235 @default.
- W3099765112 date "1999-06-10" @default.
- W3099765112 modified "2023-10-18" @default.
- W3099765112 title "Precision Photometry for Q0957+561 Images A and B" @default.
- W3099765112 cites W1977077604 @default.
- W3099765112 cites W1986464091 @default.
- W3099765112 cites W1990279104 @default.
- W3099765112 cites W1994707562 @default.
- W3099765112 cites W2006437435 @default.
- W3099765112 cites W2015339261 @default.
- W3099765112 cites W2015586533 @default.
- W3099765112 cites W2031288810 @default.
- W3099765112 cites W2031683423 @default.
- W3099765112 cites W2035144579 @default.
- W3099765112 cites W2036247675 @default.
- W3099765112 cites W2039344452 @default.
- W3099765112 cites W2064233379 @default.
- W3099765112 cites W2092916207 @default.
- W3099765112 cites W2152224356 @default.
- W3099765112 cites W2162320204 @default.
- W3099765112 cites W3104091086 @default.
- W3099765112 cites W4300234074 @default.
- W3099765112 doi "https://doi.org/10.1086/307266" @default.
- W3099765112 hasPublicationYear "1999" @default.
- W3099765112 type Work @default.
- W3099765112 sameAs 3099765112 @default.
- W3099765112 citedByCount "10" @default.
- W3099765112 crossrefType "journal-article" @default.
- W3099765112 hasAuthorship W3099765112A5026057032 @default.
- W3099765112 hasAuthorship W3099765112A5061642235 @default.
- W3099765112 hasBestOaLocation W30997651121 @default.
- W3099765112 hasConcept C120665830 @default.
- W3099765112 hasConcept C121332964 @default.
- W3099765112 hasConcept C125125069 @default.
- W3099765112 hasConcept C1276947 @default.
- W3099765112 hasConcept C130726490 @default.
- W3099765112 hasConcept C150846664 @default.
- W3099765112 hasConcept C180205008 @default.
- W3099765112 hasConcept C33024259 @default.
- W3099765112 hasConcept C44870925 @default.
- W3099765112 hasConcept C68271606 @default.
- W3099765112 hasConcept C68498078 @default.
- W3099765112 hasConcept C72659945 @default.
- W3099765112 hasConcept C94915269 @default.
- W3099765112 hasConcept C98444146 @default.
- W3099765112 hasConceptScore W3099765112C120665830 @default.
- W3099765112 hasConceptScore W3099765112C121332964 @default.
- W3099765112 hasConceptScore W3099765112C125125069 @default.
- W3099765112 hasConceptScore W3099765112C1276947 @default.
- W3099765112 hasConceptScore W3099765112C130726490 @default.
- W3099765112 hasConceptScore W3099765112C150846664 @default.
- W3099765112 hasConceptScore W3099765112C180205008 @default.
- W3099765112 hasConceptScore W3099765112C33024259 @default.
- W3099765112 hasConceptScore W3099765112C44870925 @default.
- W3099765112 hasConceptScore W3099765112C68271606 @default.
- W3099765112 hasConceptScore W3099765112C68498078 @default.
- W3099765112 hasConceptScore W3099765112C72659945 @default.
- W3099765112 hasConceptScore W3099765112C94915269 @default.
- W3099765112 hasConceptScore W3099765112C98444146 @default.
- W3099765112 hasIssue "1" @default.
- W3099765112 hasLocation W30997651121 @default.
- W3099765112 hasLocation W30997651122 @default.
- W3099765112 hasOpenAccess W3099765112 @default.
- W3099765112 hasPrimaryLocation W30997651121 @default.
- W3099765112 hasRelatedWork W1978308749 @default.
- W3099765112 hasRelatedWork W1993238770 @default.
- W3099765112 hasRelatedWork W2011569255 @default.
- W3099765112 hasRelatedWork W2016301608 @default.
- W3099765112 hasRelatedWork W2075800316 @default.
- W3099765112 hasRelatedWork W2158686925 @default.
- W3099765112 hasRelatedWork W2964199861 @default.
- W3099765112 hasRelatedWork W3041207277 @default.
- W3099765112 hasRelatedWork W3102710178 @default.
- W3099765112 hasRelatedWork W3119802639 @default.
- W3099765112 hasVolume "518" @default.
- W3099765112 isParatext "false" @default.
- W3099765112 isRetracted "false" @default.
- W3099765112 magId "3099765112" @default.
- W3099765112 workType "article" @default.