We present a homogeneous catalogue of galaxies in the field nearby galaxy cluster A 426 (Perseus) based on survey digitised Schmidt plates taken with Tautenburg 2 m telescope B band. Accurate positions, morphological types, B25 isophotal magnitudes, angular radii and position angles are given for 660 within about 10 square-degrees, centred (J2000). When available, radial velocity most common name from NED or PGC included. The comprises brighter than . estimated limit completeness is Two...

Journal Article Depth–dose curves of the beta reference fields 147Pm, 85Kr and 90Sr/90Y produced by secondary standard BSS2 Get access Jens Brunzendorf * Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany *Corresponding author: jens.brunzendorf@ptb.de Search for other works this author on: Oxford Academic PubMed Google Scholar Radiation Protection Dosimetry, Volume 151, Issue 2, August 2012, Pages 211–217, https://doi.org/10.1093/rpd/ncr480 Published: 20...

Nitrous oxide (N2O) is one of the most important greenhouse gases in terrestrial atmosphere and routinely measured with ground-based FTIR networks like Total Carbon Column Observing Network (TCCON). A spectral window for TCCON retrievals 14N216O 0002-0000-band region from 4375 to 4445 cm−1 (2.250–2.285 μm). In our study, we present first high-resolution Fourier transform spectrometer measurements self-broadening self-shift coefficients range 53–1019 hPa lines R0e–R40e this band. The line...

In beta dosimetry, the absorbed dose rate changes rapidly with depth in a given medium. Its knowledge is essential for full characterisation of reference fields and evaluation response detectors. This work presents general formalism precise determination depth–dose curves by means ionisation chamber measurements. An extrapolation not required. The appropriate range curve up to 10 mm more, when all electrons are stopped. Particular care was taken correction factors ISO 6980 fields, which most...

A new proper motion study for about 1400 stars with mag in a one square degree region around the young open cluster IC 348 based on Schmidt plates is presented. With an overall accuracy of 3 mas/yr (2.5 mas/yr, respectively all mag) we have obtained membership probabilities dividing our sample into three groups: foreground stars, and background stars. This separation also supported by distribution respect to direction standard antapex increase mean smaller radii. 240 larger than 80%. The...

We present CCD photometry and proper motion studies of the three open star clusters NGC 4103, 5281, 4755 (κ Cru). By fitting isochrones to colour magnitude diagrams, we found that all objects are young with ages at most . They located distances from approx. , derived distance moduli ranging combined membership determinations based on motions statistical field subtraction derive initial mass function (IMF) clusters. The shape IMFs could be represented by power laws exponents for 4755, when...

A procedure that allows the improved extraction of dose information based on multicolor scanning radiochromic film is presented. The basic principle determination values from each color channel digital image in RGB format by applying a nonlinear calibration function. best estimate then weighted mean derived channel. weighting factors are determined such way noise two‐dimensional profile at minimum. calculation presented; they chosen to be proportional signal‐to‐noise ratio, , all three...

Journal Article How to type test the coefficient of variation an indication Get access J. Brunzendorf, Brunzendorf Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany *Corresponding author: Jens.Brunzendorf@PTB.de Search for other works by this author on: Oxford Academic PubMed Google Scholar R. Behrens Radiation Protection Dosimetry, Volume 123, Issue 1, January 2007, Pages 21–31, https://doi.org/10.1093/rpd/ncl078 Published: 18 July 2006 history Received: 22...

The combination of variability and proper motion constraints (VPM search) is believed to provide an efficient yet unconventional search strategy for QSOs with selection effects quite different from conventional optical QSO surveys. We performed a VPM in 10 square degrees field around M 92 on 162 selected digitised Schmidt plates the Johnson B band time-baseline more than three decades. In Paper I, we constructed sample candidates . spectroscopic follow-up observations revealed 58 7 Seyfert 1...

Nitrous oxide (N2O) is a key greenhouse gas and major ozone-depleting anthropogenic pollutant monitored by the total carbon column observing network (TCCON) in 0002-0000-band of its main isotopologue. Here, we present highly accurate line strengths for this window determined using Fourier transform infrared spectroscopy with pressure, temperature, optical path length being metrologically traceable to SI. The obtained results agree previous studies within given uncertainties. Depending on...

The combination of variability and proper motion constraints (VPM search) is believed to provide an unconventional yet efficient search strategy for QSOs with selection effects quite different from conventional optical QSO surveys. Previous studies in a field high galactic latitude have shown that the VPM method indeed strategy. In present paper, we describe further variability-proper (VPM) survey on Tautenburg Schmidt plates. based exceptionally large number 162 B plates centred M 92...

We examine the merger stage of IRAS 03158+4227, one most luminous ULIRGs from 2 Jy sample. Deep optical images are presented along with high-resolution NIR and low-resolution spectra. 03158+4227 is confirmed as a component an equal-luminosity binary galaxy nuclei separation 47 / (h/75) kpc. A long lopsided tail emanating companion, which harbours active nucleus, prominent peculiar feature binary. The results numerical simulations admit interpretation this structure product tidal interaction...

We continue the QSO search in 10 square degrees Schmidt field around M 92 based on variability and proper motion (VPM) constraints. have re-reduced 162 digitised B plates with a time-baseline of more than three decades considerably improved both photometric accuracy star-galaxy separation at . candidates are selected marked one out priority statistical significance their measured zero motion. Spectroscopic follow-up observations 84 new revealed an additional 37 QSOs 7 Seyfert 1s. In...

Experimental investigation of a partially premixed flame stabilized in combination bluff body and swirling flowfields is reported. Simultaneous measurement 2D fuel distribution (Acetone-PLIF) structure (OH-PLIF) are performed with varying thermal power. Two stabilization modes – swirl influenced conical shaped, and, bluff-body toroidally shaped observed OH chemiluminescence measurements. Upstream propagation the decreasing global equivalence ratios noticed, being transferred from...

We study a sample of 23 narrow-emission line galaxies (NELGs) which were selected by their strong variability as QSO candidates in the framework variability-and-proper motion survey on digitised Schmidt plates. In previous work, we have shown that is an efficient method to find AGNs. The properties NELGs are however significantly different from those QSOs. main aim this paper clarify nature and estimate fraction AGN-dominated sample. New photometric spectroscopic observations presented,...