Follow-up observations of the Crab pulsar with MAGIC and re-analysis of archival data

Colloquium talks at prestigious universities both create and reflect academic researchers’ reputations. Gender disparities in colloquium talks can arise through a variety of mechanisms. The current study examines gender differences in colloquium speakers at 50 prestigious US colleges and universities in 2013–2014. Using archival data, we analyzed 3,652 talks in six academic disciplines. Men were more likely than women to be colloquium speakers even after controlling for the gender and rank of the available speakers. Eliminating alternative explanations (e.g., women declining invitations more often than men), our follow-up data revealed that female and male faculty at top universities reported no differences in the extent to which they (i) valued and (ii) turned down speaking engagements. Additional data revealed that the presence of women as colloquium chairs (and potentially on colloquium committees) increased the likelihood of women appearing as colloquium speakers. Our data suggest that those who invite and schedule speakers serve as gender gatekeepers with the power to create or reduce gender differences in academic reputations.

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Mysterious Dust-emitting Object Orbiting TIC 400799224

The Astronomical Journal ◽

10.3847/1538-3881/ac2c81 ◽

2021 ◽

Vol 162 (6) ◽

pp. 299

Author(s):

Brian P. Powell ◽

Veselin B. Kostov ◽

Saul A. Rappaport ◽

Andrei Tokovinin ◽

Avi Shporer ◽

...

Keyword(s):

Statistical Analysis ◽

Light Curve ◽

Dust Cloud ◽

Minor Planet ◽

Archival Data ◽

Speckle Imaging ◽

Unique Object

Abstract We report the discovery of a unique object of uncertain nature—but quite possibly a disintegrating asteroid or minor planet—orbiting one star of the widely separated binary TIC 400799224. We initially identified the system in data from TESS Sector 10 via an abnormally shaped fading event in the light curve (hereafter “dips”). Follow-up speckle imaging determined that TIC 400799224 is actually two stars of similar brightness at 0.″62 separation, forming a likely bound binary with projected separation of ∼300 au. We cannot yet determine which star in the binary is host to the dips in flux. ASAS-SN and Evryscope archival data show that there is a strong periodicity of the dips at ∼19.77 days, leading us to believe that an occulting object is orbiting the host star, though the duration, depth, and shape of the dips vary substantially. Statistical analysis of the ASAS-SN data shows that the dips only occur sporadically at a detectable threshold in approximately one out of every three to five transits, lending credence to the possibility that the occulter is a sporadically emitted dust cloud. The cloud is also fairly optically thick, blocking up to 37% or 75% of the light from the host star, depending on the true host. Further observations may allow for greater detail to be gleaned as to the origin and composition of the occulter, as well as to a determination of which of the two stars comprising TIC 400799224 is the true host star of the dips.

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BMI Changes among Marching Artists: A Longitudinal Study

Medical Problems of Performing Artists ◽

10.21091/mppa.2013.4045 ◽

2013 ◽

Vol 28 (4) ◽

pp. 236-241 ◽

Cited By ~ 2

Author(s):

Jacob J Levy ◽

Whitney J Statham ◽

Laura VanDoren

Keyword(s):

Body Mass Index ◽

Athletic Identity ◽

Archival Data ◽

Longitudinal Analyses ◽

Competitive Season ◽

World Class ◽

Archival Database ◽

Drum And Bugle Corps ◽

Practical Implications

In a series of longitudinal analyses, we examined body mass index (BMI) of drum and bugle corps performers at the beginning (Time 1) and end (Time 2) of a competitive season and again at a 1-year follow-up (Time 3). Utilizing an archival database, BMI data were recorded for 501 marching arts performers, representing four world-class drum and bugle corps. Significant reductions in BMI were found between Time 1 and Time 2 for performers in all sections (i.e., brass, percussion, and color guard). Archival data from 92 performers, representing three World-Class drum and bugle units, revealed BMI significantly increased from Time 2 to Time 3. In an effort to identify possible personal influences on the changes in BMI found between Times 2 and 3, 50 performers from one drum and bugle corps provided archival data on a measures of performers’ athletic identity (i.e., the strength and exclusivity of one’s identification with the athlete role) along with BMI. Correlational analyses revealed that performers’ athletic identity negatively related to BMI change from Time 1 and Time 3 and Times 2 and 3 (i.e., stronger athletic identity, lower BMI change). Practical implications are discussed.

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A systematic observational study of radio properties of H2O megamaser Seyfert 2s: A Guide for H2O megamaser surveys

Proceedings of the International Astronomical Union ◽

10.1017/s1743921317009814 ◽

2017 ◽

Vol 13 (S336) ◽

pp. 92-95

Author(s):

J. S. Zhang ◽

Z. W. Liu ◽

C. Henkel

Keyword(s):

Observational Study ◽

Detection Rate ◽

Seyfert Galaxies ◽

Small Sample ◽

Archival Data ◽

Radio Luminosity ◽

Selection Technique ◽

Pilot Survey ◽

Follow Up Study

AbstractAnalyzing archival data from different telescopes, H2O megamaser Seyfert 2s appeared to exhibit higher nuclear radio luminosities than non-masing Seyfert 2s (Zhang et al. 2012). This has been confirmed by our follow-up study on multi-band (11, 6, 3.6, 2, 1.3 cm) radio properties of maser host Seyfert 2s, through systematic Effelsberg observations (Liu et al. 2017). The nuclear radio luminosity was supposed to be a suitable indicator to guide future AGN maser searches. Thus we performed a pilot survey with the Effelsberg telescope on H2O maser emission toward a small sample of radio-bright Seyfert 2 galaxies with relatively higher redshift (>0.04). Our pilot survey led to one new megamaser source and one additional possible detection, which reflects our success in selecting H2O megamaser candidates compared to previous observations (higher detection rate, larger distance). Our successful selection technique choosing Seyfert 2s with radio-bright nuclei may provide good guiding for future H2O megamaser surveys. Therefore we are conducting a large systematic survey toward a big Seyfert 2 sample with such radio-bright nuclei. Detections of luminous H2O masers at large distance (z>0.04) may hold the great potential to increase our knowledge on the central highly obscured but still very enigmatic regions of active Seyfert galaxies (Zhang et al. 2017).

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Dissecting the region around IceCube-170922A: the blazar TXS 0506+056 as the first cosmic neutrino source

EPJ Web of Conferences ◽

10.1051/epjconf/201920702003 ◽

2019 ◽

Vol 207 ◽

pp. 02003

Author(s):

Theo Glauch ◽

Paolo Padovani ◽

Paolo Giommi ◽

Elisa Resconi ◽

Bruno Arsioli ◽

...

Keyword(s):

Arrival Time ◽

Archival Data ◽

High Flux ◽

Neutrino Source ◽

Multi Wavelength ◽

Cosmic Neutrino ◽

Hard Spectrum ◽

Soft Spectrum ◽

Γ Ray

On MJD 58018 the IceCube neutrino observatory detected a highlyenergetic, well-reconstructed neutrino, IceCube-170922A, at a distance of 0:1° to a γ-ray flaring blazar, TXS 0506+056. Follow-up searches in archival data additionally revealed a larger flare of neutrinos from the same direction. In order to complete the picture we present here a full multi-wavelength study of the region around IceCube-170922A. While we identify also other non-thermal counterpart candidates, we show that all the evidence points to TXS 0506+056 as the dominant neutrino emitter. Additionally, an analysis of all the available Fermi-LAT data indicates a hard spectrum/low flux of TXS 0506+056 during the neutrino flare in contrast to a soft spectrum/high flux at the arrival time of IceCube-170922A. Putting all the pieces together we conclude that the SED of TXS 0506+056 can be energetically reconnected for both neutrino observations.

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ASCA Observations of the Crab-Like Pulsar PSR B0540 – 69

International Astronomical Union Colloquium ◽

10.1017/s0252921100059935 ◽

2000 ◽

Vol 177 ◽

pp. 343-346

Author(s):

F. Nagase ◽

T. Endo ◽

M. Hirayama ◽

N. Kawai ◽

M. Itoh

Keyword(s):

Spectral Analysis ◽

High Stability ◽

Pulse Frequency ◽

Frequency Change ◽

Archival Data ◽

Crab Pulsar ◽

The Past ◽

Temporal Properties ◽

Photon Index ◽

Single Power

AbstractWe report on the spectral and temporal properties of the 50 ms pulsar PSR B0540–69 using ASCA archival data obtained during 1993 to 1995. From the spectral analysis it was found that the spectra of the whole (nebular and pulsed) emission and pulsed emission in the range 1-10 keV can be represented by a single power law of photon index, Γ = 2.00 ± 0.02 and Γpulsed= 1.7 ± 0.3 respectively. The parameters for pulse frequency change during 1993-1995 were obtained using the 9 pulse frequency measurements with ASCA. The parameters derived from the ASCA observations are consistent with the previous measurements, suggesting high stability of this pulsar, ΔΩ/Ω ≲ 0.5 × 10−7over the past 10 years. These results confirm similarity of this pulsar with the Crab pulsar.

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Multi-wavelength observations of the Galactic X-ray binaries IGR J20155+3827 and Swift J1713.4−4219

Monthly Notices of the Royal Astronomical Society ◽

10.1093/mnras/stab315 ◽

2021 ◽

Author(s):

F Onori ◽

M Fiocchi ◽

N Masetti ◽

A F Rojas ◽

A Bazzano ◽

...

Keyword(s):

Lower Energy ◽

Gamma Ray ◽

Physical Characterization ◽

Archival Data ◽

X Ray ◽

Photometric Observations ◽

Multi Wavelength ◽

X Ray Binaries

Abstract In recent years, thanks to the continuous surveys performed by INTEGRAL and Swift satellites, our knowledge of the hard X-ray/soft gamma-ray sky has greatly improved. As a result it is now populated with about 2000 sources, both Galactic and extra-galactic, mainly discovered by IBIS and BAT instruments. Many different follow-up campaigns have been successfully performed by using a multi-wavelength approach, shedding light on the nature of a number of these new hard X-ray sources. However, a fraction are still of a unidentified nature. This is mainly due to the lack of lower energy observations, which usually deliver a better constrained position for the sources, and the unavailability of the key observational properties, needed to obtain a proper physical characterization. Here we report on the classification of two poorly studied Galactic X-ray transients IGR J20155+3827 and Swift J1713.4−4219, for which the combination of new and/or archival X-ray and Optical/NIR observations have allowed us to pinpoint their nature. In particular, thanks to XMM-Newton archival data together with new optical spectroscopic and archival Optical/NIR photometric observations, we have been able to classify IGR J20155+3827 as a distant HMXB. The new INTEGRAL and Swift data collected during the 2019 X-ray outburst of Swift J1713.4−4219, in combination with the archival optical/NIR observations, suggest a LMXB classification for this source.

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Company Worth Keeping: Personal Control and Preferences for Brand Leaders

Journal of Consumer Research ◽

10.1093/jcr/ucz040 ◽

2019 ◽

Vol 46 (5) ◽

pp. 871-886 ◽

Cited By ~ 2

Author(s):

Joshua T Beck ◽

Ryan Rahinel ◽

Alexander Bleier

Keyword(s):

Real World ◽

Personal Control ◽

Initial Study ◽

Purchase Intentions ◽

Archival Data ◽

Personal Agency ◽

Underlying Process ◽

External Conditions ◽

Rule Out

Abstract Brand leaders possess tremendous agency, with the ability to shape a sweeping variety of outcomes. Does this fact confer psychological value to consumers? We posit that external conditions that undermine feelings of personal control cause consumers to affiliate more with brand leaders. This occurs because affiliating with such high-agency brands gives consumers a sense of personal agency and thereby restores feelings of control. An initial study using archival data from nearly 18,000 consumers reporting on over 1,200 brands documents real-world effects that are consistent with these propositions. Four follow-up experiments demonstrate the effect of low control on brand leader (vs. nonleader) purchase intentions using direct manipulations in controlled settings, capture the underlying process, and rule out alternative explanations. This research thus reveals that the psychology of personal control underlies a process that benefits brand leaders.

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Breakthrough Listen follow-up of the reported transient signal observed at the Arecibo Telescope in the direction of Ross 128

International Journal of Astrobiology ◽

10.1017/s1473550417000465 ◽

2017 ◽

Vol 18 (1) ◽

pp. 33-35 ◽

Cited By ~ 2

Author(s):

J. Emilio Enriquez ◽

Andrew Siemion ◽

Ryan Dana ◽

Steve Croft ◽

Abel Méndez ◽

...

Keyword(s):

Radio Emission ◽

Transient Signal ◽

Archival Data ◽

L Band ◽

Green Bank Telescope

AbstractWe undertook observations with the Green Bank Telescope, simultaneously with the 300 m telescope in Arecibo, as a follow-up of a possible flare of radio emission from Ross 128. We report here the non-detections from the GBT observations in C band (4–8 GHz), as well as non-detections in archival data at L band (1.1–1.9 GHz). We suggest that a likely scenario is that the emission comes from one or more satellites passing through the same region of the sky.

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Therapy and prevention for mental health: What if mental diseases are mostly not brain disorders?

Behavioral and Brain Sciences ◽

10.1017/s0140525x1800105x ◽

2019 ◽

Vol 42 ◽

Cited By ~ 2

Author(s):

John P. A. Ioannidis

Keyword(s):

Mental Health ◽

Mental Disease ◽

Brain Disorders ◽

Social Stressors ◽

Labor Education ◽

Mental Diseases ◽

Long Term Follow Up ◽

Political Decisions

AbstractNeurobiology-based interventions for mental diseases and searches for useful biomarkers of treatment response have largely failed. Clinical trials should assess interventions related to environmental and social stressors, with long-term follow-up; social rather than biological endpoints; personalized outcomes; and suitable cluster, adaptive, and n-of-1 designs. Labor, education, financial, and other social/political decisions should be evaluated for their impacts on mental disease.

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