The Temperature of the Cosmic Microwave Background

The FIRAS data are independently recalibrated using the WMAP data to obtain a CMB temperature of 2.7260 +/- 0.0013. Measurements of the temperature of the cosmic microwave background are reviewed. The determination from the measurements from the literature is cosmic microwave background temperature of 2.72548 +/- 0.00057 K.Comment: 6 Pages 3 figure

Probing the Universe's Tilt with the Cosmic Infrared Background Dipole

Conventional interpretation of the observed cosmic microwave background (CMB) dipole is that all of it is produced by local peculiar motions. Alternative explanations requiring part of the dipole to be primordial have received support from measurements of large-scale bulk flows. A test of the two hypothesis is whether other cosmic dipoles produced by collapsed structures later than last scattering coincide with the CMB dipole. One background is the cosmic infrared background (CIB) whose absolute spectrum was measured to ~30% by the COBE satellite. Over the 100 to 500 {\mu}m wavelength range its spectral energy distribution can provide a probe of its alignment with CMB. This is tested with the COBE FIRAS dataset which is available for such a measurement because of its low noise and frequency resolution important for Galaxy subtraction. Although the FIRAS instrument noise is in principle low enough to determine the CIB dipole, the Galactic foreground is sufficiently close spectrally to keep the CIB dipole hidden. A similar analysis is performed with DIRBE, which - because of the limited frequency coverage - provides a poorer a dataset. We discuss strategies for measuring the CIB dipole with future instruments to probe the tilt and apply it to the Planck, Herschel and the proposed Pixie missions. We demonstrate that a future FIRAS-like instrument with instrument noise a factor of ~10 lower than FIRAS would make a statistically significant measurement of the CIB dipole. We find that the Planck and Herschel data sets will not allow a robust CIB dipole measurement. The Pixie instrument promises a determination of the CIB dipole and its alignment with either the CMB dipole or the dipole galaxy acceleration vector.Comment: 9 pages 9 figure

ARCADE: Absolute Radiometer for Cosmology, Astrophysics, and Diffuse Emission

The Absolute Radiometer for Cosmology, Astrophysics, and Diffuse Emission (ARCADE) is a balloon-borne instrument designed to measure the temperature of the cosmic microwave background at centimeter wavelengths. ARCADE searches for deviations from a blackbody spectrum resulting from energy releases in the early universe. Long-wavelength distortions in the CMB spectrum are expected in all viable cosmological models. Detecting these distortions or showing that they do not exist is an important step for understanding the early universe. We describe the ARCADE instrument design, current status, and future plans.Comment: 12 pages, 6 figures. Proceedings of the Fundamental Physics With CMB workshop, UC Irvine, March 23-25, 2006, to be published in New Astronomy Review

ARCADE 2 Measurement of the Extra-Galactic Sky Temperature at 3-90 GHz

The ARCADE 2 instrument has measured the absolute temperature of the sky at frequencies 3, 8, 10, 30, and 90 GHz, using an open-aperture cryogenic instrument observing at balloon altitudes with no emissive windows between the beam-forming optics and the sky. An external blackbody calibrator provides an {\it in situ} reference. Systematic errors were greatly reduced by using differential radiometers and cooling all critical components to physical temperatures approximating the CMB temperature. A linear model is used to compare the output of each radiometer to a set of thermometers on the instrument. Small corrections are made for the residual emission from the flight train, balloon, atmosphere, and foreground Galactic emission. The ARCADE 2 data alone show an extragalactic rise of $50\pm7$ mK at 3.3 GHz in addition to a CMB temperature of $2.730\pm .004$ K. Combining the ARCADE 2 data with data from the literature shows a background power law spectrum of $T=1.26\pm 0.09$ [K] $(\nu/\nu_0)^{-2.60\pm 0.04}$ from 22 MHz to 10 GHz ($\nu_0=1$ GHz) in addition to a CMB temperature of $2.725\pm .001$ K.Comment: 11 pages 5 figures Submitted to Ap

Calibrating Array Detectors

The development of sensitive large format imaging arrays for the infrared promises to provide revolutionary capabilities for space astronomy. For example, the Infrared Array Camera (IRAC) on SIRTF will use four 256 x 256 arrays to provide background limited high spatial resolution images of the sky in the 3 to 8 micron spectral region. In order to reach the performance limits possible with this generation of sensitive detectors, calibration procedures must be developed so that uncertainties in detector calibration will always be dominated by photon statistics from the dark sky as a major system noise source. In the near infrared, where the faint extragalactic sky is observed through the scattered and reemitted zodiacal light from our solar system, calibration is particularly important. Faint sources must be detected on this brighter local foreground. We present a procedure for calibrating imaging systems and analyzing such data. In our approach, by proper choice of observing strategy, information about detector parameters is encoded in the sky measurements. Proper analysis allows us to simultaneously solve for sky brightness and detector parameters, and provides accurate formal error estimates. This approach allows us to extract the calibration from the observations themselves; little or no additional information is necessary to allow full interpretation of the data. Further, this approach allows refinement and verification of detector parameters during the mission, and thus does not depend on a priori knowledge of the system or ground calibration for interpretation of images.Comment: Scheduled for ApJS, June 2000 (16 pages, 3 JPEG figures

Homeopathy in the age of antimicrobial resistance: Is it a viable treatment for upper respiratory tract infections?

Background: Acute upper respiratory tract infections (URTIs) and their complications are the most frequent cause of antibiotic prescribing in primary care. With multi-resistant organisms proliferating, appropriate alternative treatments to these conditions are urgently required. Homeopathy presents one solution, however there are many methods of homeopathic prescribing. This review of the literature considers firstly whether homeopathy offers a viable alternative therapeutic solution for acute upper respiratory tract infections (URTIs) and their complications and secondly how such homeopathic intervention might take place. Method: Critical review of post 1994 clinical studies featuring homeopathic treatment of acute upper respiratory tract infections and their complications. Study design, treatment invention, cohort group, measurement and outcome were considered. Discussion focused on the extent to which homeopathy is used to treat URTIs; rate of improvement and tolerability of the treatment; complications of URTIs; prophylactic and long-term effects; the use of combination versus single homeopathic remedies. Results: Multiple peer review studies were found in which homeopathy had been used to treat upper respiratory tract infections and associated symptoms (cough, pharyngitis, tonsillitis, otitis media, acute sinusitis etc.). 9 RCTs and 8 report observational/ cohort studies were analysed, 7 of which were paediatric studies. 7 RCTs used combination remedies with multiple constituents. Results for homeopathy treatment were positive overall, with faster resolution, reduced use of antibiotics and possible prophylactic and longer-term benefits. Conclusions: Variations in size, location, cohort and outcome measures make comparisons and generalisations concerning homeopathic clinical trials for URTIs problematic. Nevertheless, study findings suggest at least equivalence between homeopathy and conventional treatment for uncomplicated URTI cases, with fewer adverse events and potentially broader therapeutic outcomes. The use of non-individualised homeopathic compounds tailored for the pediatric population merits further investigation, including through cohort studies. In the light of antimicrobial resistance, homeopathy offers alternative strategies for minor infections and possible prevention of recurring URTIs

Fragile minds, porous selves: Shining a light on autoethnography of mental illness

This article sheds light on autoethnographic accounts of mental illness, to address author and reader concerns and questions and to consider what practitioners can learn from these narrative accounts. Drawing from my own and others’ trajectories, I discuss the drawbacks and dangers of exposing a ‘flawed’ identity, the stigma of serious mental illness, intertextuality issues, the tangled nature of revelation and redemption, framing the ‘Other’ in mental illness autoethnography and depictions of ‘life in the asylum.’ I explain how in telling my own ‘psychiatric’ tale, I looked to the symbolic concept of ‘communitas’ as a means of examining inter-relational processes and collective experience in a psychiatric facility. I argue that, while the act of writing about one’s illness experience can be rightly perceived as a way of reclaiming personal ‘power’ and facilitating healing, attempts to ‘evidence’ recovery can run counter to the writer’s reality of life with or beyond mental illness as personally and socially messy. In answer to the question, ‘at what point does a ‘life in the asylum’ narrative become autoethnographic?' I argue for the potential of autoethnography to contribute to broader sociological, ethnographic and medical debates and thus impact on policy. Speaking up about mental health through autoethnography can help to promote awareness of the unpredictability and socially constructed nature of mental illness and can inform strategies toward reducing public stigma, tackle the cyclical impact of labels, highlight the need to change social and medical attitudes, and revisualize treatment and support

“Communitas in Crisis”: An Autoethnography of Psychosis Under Lockdown

In this article, I use autoethnography to examine time spent on an acute psychiatric ward during the COVID-19 lockdown. I employ the device of “communitas in crisis” to emphasize the precarious nature of this experience and the extent to which, for myself at least, informal social interactions with fellow patients and “communitas” were significant features of my hospital experience and subsequent discharge. I suggest that a lack of emphasis on inpatient to inpatient relationships in the recovery literature is an omission and a reflection of psychiatry’s authority struggles with both service users and professionals, along with a general perception of psychosis as individual rather than as a socially constructed phenomenon. I also suggest that, especially in the wake of greater social distancing, mental health and social services should safeguard against psychological and social isolation by creating more spaces for struggling people to interact without fear or prejudice

What does successful social prescribing look like? Mapping meaningful outcomes

This study aimed to investigate and collate all the outcomes that are being experienced in link worker based social prescribing schemes. We found this reflects a large evidence gap where research money needs to be invested. Data from this study highlighted that VCSE organisations engaged with social prescribing are not receiving full attribution for their contribution to improving the health and wellbeing of people. Within the literature, there are a range of reports and research articles that support the use of community organisations and services. Little of this knowledge or impact, however, is contextualised within the terms of link worker based social prescribing schemes