International workshop on scientific use, digitization and preserving astronomical photographic records
Rene Hudec: Worlds Astronomical Photographic Archives: Past, Present, Future
Astronomical Photographic Archives worldwide will be briefly presented and discussed as well as the recent status of their scientific use and digitization
Milcho Tsvetkov: Wide-Field Plate Database in a context of the development of the Astroinformatics
We describe the Wide-Field Plate Database (WFPDB www.wfpdb.org) as a basic source of data for the wide-field astronomical photographic plates obtained with professional telescopes worldwide in a context of the development of the Astroinformatics recourses. The WFPDB consists of four parts: Catalogue of Wide-Field Plate Archives (CWFPAs); Catalogue of Wide-Field Plate Indexes (CWFPIs), Data Bank of Digitized Plate Images, Links to online services and cross-correlation with other needed catalogues and journals. A special attention on the plate archiving is paid more... on some plate collections in Germany, USA (HCO), Ukraine, Romania, Hungary, Armenia, Belgium, Serbia, etc., where with the help of our working team and the efforts of astronomers, networking and information technology specialists, and librarians, the process of plate archiving is running actively.
We describe also an attempt for creating links between databases (Wide-Field Plate Database, WFPDB) and electronic journals (Information Bulletin on Variable Stars, IBVS). The project aims closer connections between scientific papers and the data they are based upon. The merits of a paper can be evaluated better (both before and after publication) if the data used is accessible, which gives a possibility of its re-use - one of the goals of the Virtual Observatory.
Our priority is to integrate the WFPDB system into the VO structures (f.e. GAVO) and thus utilize our experience and efforts in astronomical archives processing, data reduction, etc. We intend to implement the major protocols, necessary to turn the WFPDB into a fully featured VO service.
The forthcoming steps of the WFPDB development should be summarized as well as: International collaboration for plate catalogues inventory (only about 25% from all existing plates are visible via WFPDB) - the main aim of the project Humboldt_Astroinfromatics.net; digitizing plates according to the VO standards in FITS format as well development of the equal criteria and parameters for plate digitization and preprocessing and the photometry of digitized plates; free access to the files of digitized photographic plates by the VO instruments.
Yuri Nefedyev: Ground-based and space photographies of the Moon: production, reduction, storage (poster)
In report we present the brief history of the development of photographic positional observations of the Moon in Kazan University and Engelhard Astronomical Observatory (EAO) from the end of the last century until the present. In EAO there is a big archive of the unique photographs of the Moon with stars and its reduction is carried out. The observations of the Moon are made to solve three problems: studying the rotation of the Moon, the mapping of the nearside of more... the Moon and its marginal zone, investigation of the dynamic time scale. Several works about determination the ephemeris time and its using for analyzing selenodetic reference coordinates systems were made on the basis of plates of the Moon. Today we are carrying out the reduction of the lunar images and their transformation into digital form.
Aleksey Andreev: GEAO Center of space researches and technologies and astronomical photographic plates library
Today on the basis of Engelhardt astronomical observatory (EAO) we are creating Centre of cosmic researches and techniques and Astropark according to the Program of the Kazan Federal University development. The Center has the following missions: education, science, astronomical tourism. In EAO there is a big glass library containing the photographic plates as well. Many plates are the pictures of the stars, planets, the Moon with stars etc. We are planning to scan and process these plates.
Kenesken Kuratov: Organization of virtual observatory in the Republic of Kazakhstan
The results of development, creation and equipment of automated system of telescope remote control via Internet from any point of the Earth are presented. It is planned the creation of virtual observatory on the basis of automated telescope.
Vojtech Simon: Photographic plates and the long-term activity of binary X-ray sources
We show that cataclysmic variables and related objects with their strong long-term activity are promising objects for monitoring using photographic plates. Activity of some of them undergoes large changes on timescale of decades – photographic data can significantly extend the mapped time interval, and to discover such changes. Such objects are often X-ray emitters and photographic data enable us to study their activity even in the time intervals before the discovery in X-rays (even many decades before). Unpredictable and rare more... events (flares, outbursts, transitions between the states) can be discovered
on archival photographic plates. We will show that useful scientific results can be obtained by various methods of measuring the brightness
of an object on the plates (either digitized or non-digitized).
Omar Kurtanidze: The digitization of low dispersion spectral survey plates of the Milky Way
The results of the objective prism low dispersion (1250Å/mm at H gamma) spectral survey of the Galaxy equatorial ten degree belt (|b|<5°, 30°<l<165°, 195°<l<210°) are presented. More than 1500 Carbon Stars were identified, among them 862 new ones. The C/M5+ ratio increases from 0.02 to 0.30 when longitude varies from 30° to 210°. Besides, we also conducted the deepest low dispersion objective prism near-infrared (7200 A/mm at A band, IV-N+RG695, I=15.5 m) spectral survey of the Milky Way region |b|<5.2°, more... 50°<l<115°. As a result over 500 new carbon stars were identified. The surface density of carbon stars reaches its maximum values in the directions of Carina (l=292.5°) and Cygnus-Cassiopeia (l=97.5°), which are equal to 2.7 and 2.3 star per sq. deg., respectively. The latitude distribution (|b|<5°.0) is uniform. Currently, we are at the stage to digitize the plates of selected regions of Milky Way. On the basis of this data the natural spectral groups will be identified and their distribution studied.
Shuhrat Ehgamberdiev: Present status of the photographic archive of the Tashkent and Kitab astronomical observatories in Uzbekistan
Photographic glass archive of the Ulugh Beg Astronomical Institute contains of about 10 thousand plates obtained for the period 1895 – 1976 with a normal astrograph (D=330 mm; F=3436 mm; FOV= 2.5x2.5◦) installed at Tashkent and for period 1978 – 2004 with a Double Zeiss Astrograph (D=400 mm; F=3000 mm; FOV= 5.5x5.5◦) installed at Kitab Latitude station. The archive contains images of galaxies, planets, their satellites and asteroids, planetary nebulae and star clusters (330 plates). A few hundred plates contain more... images of different objects and phenomena such as comets and variable stars, solar eclipses, the transit of the Mercury through the solar disk and so on.
At present the complete collection of the plates (including the plates obtained in Kitab) are stored in UBAI in a moderately good conditions. In 2014 – 2015 part of the archive have been digitized using a commercial flatbed scanner machine Epson Expression 10000XL.
In the presentation more detailed content of the UBAI archive as well as method of digitization and scientific cooperation projects will be discussed.
Kuysinoy Rashidova (Ehgamberdieva): Czech astronomer Josef Sykora and his life at the Tashkent astronomical observatory
Czech astronomer Josef Sykora worked at Tashkent astronomical observatory in 1906-1911. He made photographic observations at normal astrograph. In particular he photographed Halley comet in 1910. He emigrated to Czech Republic in 1921, but he kept contact with his colleagues in Tashkent. Since that time he worked at Prague astronomical observatory.
Another astronomer of the Tashkent astronomical observatory V.V. Stratonov who was main observer at the Tashkent’s normal astrograph emigrated to Czech Republic in 1922. In 1938 he obtained more... Czechoslovak citizenship and became a professor of the Czech Technical University where he offered lectures about geodetic astronomy. He was a prolific writer of books (also in Czech language). He is buried in Prague, Olsany cemetery.
Some interesting episodes of their life in Tashkent will be presented.
Detlef Groote: The Hamburg plate archives - a status report
Zheng-Hong TANG: Initial results of the new digitization machine
Somce initial results of the new digitization machine will be presented.
Jian-Hai ZHAO: Initial results of the new digitization machine
Some initial results of the new digitization machine will be presented.
Kroll Peter: State of digitization of Sonneberg Plate Archive
Sonneberg Observatory is going to finish complete scanning of its plate archive. The talk provides an overview of the digital data and the current activities of making them accessible.
Blanka Hnulíková: Survey of the physical condition of photo albums Astronomical Institute of the Czech Academy of Sciences (poster)
During the survey was assessed mechanical, chemical and biological damage of photos and albums. For photos were of the suspected damage to the manifestation of \"golden illness\". In the conclusion was designed protection according to measure per priority.
Sergey Shugarov: The investigation of photometric variability novalike V380 Oph on archival and modern data (poster)
Lukas Hudec: Photographic plate digitization by digital camera
The alternative digitization method of photographic plates by digital camera will be presented and discussed
Taavi Tuvikene: From plate scans to light curves: calibrating extracted data and building the APPLAUSE database with PyPlate
We have developed methods for extracting and calibrating data from digitized photographic plates and have implemented the methods in the PyPlate package. PyPlate can be used to locate sources in direct images, calibrate source positions and magnitudes, process plate metadata, and write results to a database. Effectively, raw scans are turned into light curves of potentially millions of objects. In the presentation we show how PyPlate is applied to more than 40000 images to build the APPLAUSE database and how more... the software can be used for processing plate data elsewhere.
Enke Harry: The APPLAUSE Data
The APPLAUSE website is publishing the second data release of astronomical photoplates. The talk will give some background and describe extend and aspects of the data release.
Also, we will offer a \'hands-on\' tutorial how to use the published data set using the Query interface. (At an additional time of the meeting)
Sergei Vereshchagin: Open Star Clusters in the Zvenigorod Observatory Plate Archive (poster)
Stepanka Boryskova: Conservation Treatments on Glass Plate Negative with Flaking Gelatine Layer
This report show conservation treatments on glass plate negative with extremely damaged sensitive layer. In this case the glass plate was degraded and the bigger parts of the sensetive layer are separated from the glass support.
Petr Skala: Spectra measurement from historic digitalised plates
Christine Etienne: Observatoire de la Côte d\'Azur plates archive:contribution to scientific heritage in the Gaia era (poster)
The Observatoire de la Côte d’Azur (OCA), formerly Observatoire de Nice, owns 16 000 photographic plates or films taken during more than 60 years (1935-1996). They concern mainly instruments at OCA sites, the Nice Zeiss binocular astrograph and the Calern Schmidt telescope, but also collections from other observing sites. An important protection operation was undertaken in 2012 to preserve these astronomical photographic plates with a secured storage. A study of these plates will be realised including the archiving, preservation and more... documentation aspects (database realisation with digitalization of observing logs).
Petra Vávrová: Non-destructive methods for identification and survey of photographic techniques
A number of different kinds of methods have been developed and introduced to aid in the identification of photographs and different techniques. Presentation will be focus on description and important information of identification and survey of different kinds of photographic techniques, for example X-ray different kinds of microscopy, handheld X-Ray fluorescence spectrometry, infrared spectrometry (FTIR), system SurveNIR, microfadeometry for determination of light sensitivity.
Natalia Chupina: Open Star Clusters in the Zvenigorod Observatory Plate Archive (poster)
Ilgmars Eglitis: Astrometry and photometry of Pluto from digitized photographic observations during 1961 to 1996.
A catalog of equatorial coordinates and magnitudes of Pluto for the period 1961-1996 has been derived from digitized photographic observations from the combined digital archive of UkrGO Observatory and the Institute of Astronomy of University of Latvia. Improvement of software processing of digitally scanned images allowed single images to be extracted from multiple exposures of Pluto images represented on a single astronegative. As a result of the new treatment 22 new coordinate measurements of Pluto observations have been added to more... the 80 already in this catalog. Comparison has been made with the JPL DE431 ephemeris and the results analyzed.
Milan Spasovic: Sonneberg Sky Patrol Archive - Photometric Analysis
Early works on the sky patrol plates showed that photometric accuracy can be enhanced with fitting algorithms. The used procedure was a manually supported click-and-fit-routine, not suitable for automatic analysis of vast amount of photographic plates. We will present our progress on deconvolution of overlapping sources on the plates and compare photometric analysis using different methods. Our goal is to get light curves of sufficient quality from sky patrol plates, which can be classified with machine learning algorithms.
Kirill Sokolovsky: Variable stars identification in digitized photographic data
I discuss various techniques of identifying variable objects in a set of photographic lightcurves. The comparison is based on lightcurves obtained from the Moscow collection plates digitized with a commercial flat-bed scanner.
Roberto Nesci: The historic light curve of GR290 from plate archives
We have investigated the past light history of the luminous blue variable star GR 290 (M33/V532, Romano’s Star) in the M 33 galaxy, since 1901, using archival plates of Heidelberg, Pulkovo, Hamburg, Yerkes and Asiago
The light curve showed that for at least half a century the star was in a low luminosity state, with B ≃18-19, at variance with the behaviour of the last 60 years.
Verónica Lencinas: Metadata salad at the Cordoba Observatory
The Plate Archive of the Cordoba Observatory includes 20.000 photographs and spectra on glass plates dating from 1893 to 1983. This contribution describes the work performed since the plate archive was transfered to the Observatory Library in 2011. In 2014 an interdisciplinary team was assembled and a research grant from the National University of Cordoba was obtained with the objectives of preserving the glass plates and generate public access for astronomers and other audiences. The preservation work not only includes more... practical intervention to improve conservation conditions for the whole archive, but also a diagnosis of the preservation conditions for the plates and identification of best practices for cleaning the plates. The access envisioned through digitalization requires not only the scanning of all the plates, but also careful definition and provision of metadata. In this regard, each institutional level involved – in this case: archive, library, astronomical observatory and public university - demands and provides different bibliographic practices, involving multiple standards of description and coding.
Thouvenin Nicolas: The Digitizing NAROO project
The arrival of the Gaia refernce catalogue will give a new interest in old photographic plates.
All solar system objects observations made in the past will be worth to be re-reduced
to provide accurate data. We will be able to observe in the past.
For that purpose, Paris observatory will set up a new sub-micrometric scanning machine
able to provide high accurate astrometric images. More, this machine will be able to digitize
other types of plates for other scientific goals.
In our presentation, we will explain more... our purpose and our projects for digitizing the
photographic plates collection of several observatories and institutes.
Sergei Schmalz: The Potsdam plate archive - a status report
A status report will be given on the progress in digitization of astronomical photographic plates at the Astrophysical Institute of Potsdam. Also, the development of the Astroplate Wiki web-page will be presented.
Elena Roshchina: The photographic plates archive of Pulkovo Observatory
The glass plate archive of Pulkovo Observatory contains about of 50 thousands of astronegatives with observations of more than 1400 objects. These plates were obtained during 1893–2007 years. Photographic observations are relevant still, since many scientific tasks require the observations obtained during a long period. Since 2000 we develop the processing methods to improve accuracy, increase productivity and take in account the safety of the photographic plates. In 2012, we proposed a news method of digitization, measurement and calibration of more... photographic plates using of digital photo camera. More than 9,000 of photographic plates with observations of double stars were digitized and measured using this method. The single-exposure measurement accuracy is within the range of 0.1 - 3.5 micron, 1.4 micron in both coordinates on average. Probably, this range of accuracy is due to the quality of the photographic material. At present, we work on new reduction of major planet satellites observations. The new method combined with using of modern catalogs gives an increase in the coordinates accuracy of 2-3 times compared with the previous results.
Iryna Vavilova: Science with the UkrVO Joint Digitizad Archive of astroplates
A current state of the Joint Digitized Archive of astroplates (JDA) of the Ukrainian Virtual Observatory (UkrVO), which contains the celestial bodies observed from the end of XIX century, is described. A special attention is focused on the development and improvement of software for plate reduction and results for different scientific programs in 2014-2015. Among these programs are as follows: the star catalogues; astrometric tasks for giant and small planets of the Solar system, Pluto, and satellites of giant planets; more... stellar catalogue around GRBs; creation of the joint archive of spectra of long-term observations of the selected stars. The prospective scientific tasks with JDA UkrVO in frame of the international cooperation are discussed.
Yuri Protsyuk: Using plate archives as a first epoch for a proper motion catalogues.
In the Research Institute \"Nikolaev Astronomical Observatory\" (NAO) catalogue of position and proper motions of stars in the areas around the Galactic open clusters was created by using photographic and CCD observations obtained with different telescopes in the 20-21 century.
In this report we present our final photographic catalogue for middle epoch 1983,6. First version was presented in 2014 . All plates (20x20cm, 5ºx5º) obtained with the Zonal Astrograph of NAO (D = 116 mm, F = 2040 mm, scale =101\"/mm) more... in 1962-1993. Digitization of 290 plates in one orientation with 6 scan for each plate were carried out by the Epson Perfection V750 Pro scanner with a resolution of 1200dpi and 1600dpi. Initial processing of photographic images was carried out in the MIDAS/ROMAFOT package. The final data reduction and catalogue compilation were made by our own software . Catalogue of position of about 2.7 million stars (7-16)m in Tycho-2 system was obtained. The accuracy of positions on both coordinates is ranged from 0.02-0.04\" for the stars of (7-12)m to 0.08-0.11\" for the stars of (14-16)m.
1. Protsyuk Yu.I. et al: 2014, Kinematics and Physics of Celestial Bodies, v.30, N6, p.296.
2. Protsyuk Yu.I. et al. 2014, Odessa Astronomical Publications, v.27, N1, p.59.
Yuri Protsyuk: The original astrometric software package for digitized photographic plates.
General algorithm for the data processing for the digitized photographic plates was developed in 2005 - 2014 (Andruk 2005, Yatsenko 2011, Protsyuk, 2014) and has been already applied in Kiev (Andruk 2016), Kitab (Andruk 2015) and Nikolaev (Protsyuk 2014). This algorithm uses the MIDAS routines to extract objects from the images (up to 32000 x 32000 pixels size) and to measure the rectangular coordinates of the found objects as well as their instrumental magnitudes, intensities and diameters (FWHM). One of more... the big problem of the digitized images scanned using the Epson Expression 10000XL or similar scanners are systematic errors in measured coordinates along the scanned direction (Y-axis) due to the irregular scanning speed. A seemingly logical solution to scan each plate twice with the rotating by 90° was already investigated (Andruk 2015). The results were for the astrometric purposes not satisfied and furthermore it leads to double time by scanning procedure and to double memory place by storage the data. We present an original solution for this problem which can correct these systematic errors using only one digitized image (Protsyuk, 2014). The experience of the using this software package by the creating of catalogues of the zero zone of the Kitab observatory (Muminov 2016) and Kiev 60 zone (Andruk 2014) showed that on such a way the errors in positions can be achieved 0.1\" in both directions for image scale near 2\"/pixel and errors in magnitudes 0.1 mag.
1. Andruk V.M. et.al. 2005, Kinematika Fiz. Nebesnykh Tel, v.21, N5, p.396.
2. Yatsenko A.I. et.al. 2011, Kinematics and Physics of Celestial Bodies, v.27, N5, p.249.
3. Protsyuk Yu.I. et al. 2014, Odessa Astronomical Publications, v.27, N1, p.59.
4. Andruk V.M. et.al. 2016, Kinematics and Physics of Celestial Bodies, v.32, N1, p.38.
5. Andruk V.N. et al: 2015, Odessa Astronomical Publications, v.28,N2, 188.
6. Protsyuk Yu.I. et al: 2014, Kinematics and Physics of Celestial Bodies, v.30, N6, p.296.
7. Andruk V.N. et al: 2015, http://arxiv.org/abs/1512.05535
8. Protsyuk Yu.I. et al. 2014, Odessa Astronomical Publications, v.27, N1, p.61.
9. Muminov M.M. et al, 2016, Izvestiya GAO v Pulkovo, in press.
10. Andruk V.N. et al: 2014, Odessa Astronomical Publications, v.27,N1, 53.
Yuri Protsyuk: Photographic Survey of the Northern Sky: hidden reserves
Catalogue FONAC of 2 million stars down to 14m was obtained in the last decade of the past century using the photographic plates of the survey with wide-field astrographs (FON). But the photographic observational material was not used in its entirety. The application of the commercial scanners for the digitizing of the FON collection of photographic plates from UkrVO Joint Digital Archive permits to obtain the stellar catalogue with 20 million entries – the total amount of objects more... fixed on the photographic plates.
The thorough investigation of scanner impact onto the positional and photometric accuracy of the results allows to find the optimum scanning parameters for the elimination of scanner gear errors. The image processing was made on the basis of MIDAS/ROMAFOT software, with the authors’ own development routines which allow to get photometric evaluations and positions of objects as well on the frames with linear dimensions of 13 000x 13 000 pixels.
Two stellar catalogues are created according the adopted to the date procedure: the catalogue of objects in 60-degree zone (1.2 million objects in the strip 56-64 degrees) [1,2] and the catalogue of the circumpolar region (~2 million stars in the cap from 58 degree) [3,4]. The accuracy of both catalogues is ± 0.11\" and ± 0.06m for stars brighter than 14m (± 0.23 \" and ± 0.12m for catalogues in total ).
At the moment the 70% of digitized FON collection is processed.
1. Andruk V.N. et al: 2014, Odessa Astronomical Publications, v.27,N1, 53.
2. Andruk V.N. et al: 2015, http://arxiv.org/abs/1512.05535
3. Andruk V.N. et al: 2015, Odessa Astronomical Publications, v.28,N2, 192.
4. Andruk V.M. et.al. 2016, Kinematics and Physics of Celestial Bodies, v.32, N1, p.38.
René Hudec: Digitization of Astronomical Plates in Mexico (poster)
Co-authors: Deborah Dultzin Kessler and Lukas Hudec
Historical astronomical photographic plates stored at UNAM, Mexico City, Mexico including CdC plates were digitized by transportable system based on digital camera within collaborative CONACYT - AV CR project. Preliminary results will be presented and discussed.
René Hudec: Astronomical negatives from Satellite Tracking Cameras
There are very numerous photographic records taken by satellite tracking cameras, e.g. Baker-Nunn (SAO and USAF networks) and Hewitt. The total number of frames taken by
these systems is more than 1 million. The photographic images (usually stored as long film stripes) have large FOV (typically 5 x 30 deg.), very good time resolution (from few seconds) and limiting magnitude up to 16. These database is hence well suited for astrophysical studies e.g. searches for and analyses of short more... optical transients etc.
Ilgmars Eglitis: U-magnitudes of stars and galaxies from the digitized astronegatives of Baldone Schmidt telescope
Archive of 1.2m Baldone Schmidt telescope had 753 astronegatives in 314 fields exposed in Johnson U pass band. The goal of the work is to provide U-magnitudes of all objects (stars, galaxies, asteroids, etc.), recorded on these plates, due to the acute shortage of definitions of U-magnitudes of stars on the celestial sphere. Processing of several tens of test records gave the following result: accuracy of the equatorial coordinates of the stars in Tycho2 catalog is about 0.1arc seconds and more... precision of the characteristic curves in the U-band lies in the range of 0.1-0.2 magnitude. Scans of plates were carried on the scanners Epson Expression 10000XL, 11000XL with spatial resolution 1200dpi, processing - in a package LINUX / MIDAS / RAMAFOT.
Ilgmars Eglitis: Asteroids from digitized processing of photographic observations in Baldone
Digital processing photographic plates of star fields allows, in addition to the main tasks to carry out a massive search for images of small bodies of the solar system and to determine their coordinates. From the observations of earlier epoch, you can extract information about the locations of these bodies well before discovering them. We analyzed the results of 20 observations of clusters in UVBR bands and 7 of Pluto observations made on the 1.2-m Schmidt telescope of the more... Observatory of University of Latvia in Baldone. At the moment, it identified 50 positions and magnitudes of asteroids weaker than 14m.5 for 1967-1991 years .. Among them 11 positions for 7 asteroids which at the time of observation was the earliest of the world\'s known observations of these asteroids. Analysis was carried out. In order to determine the accuracy 2 to 7 scan results of plates where used.
Heber Ulrich: The digitization of the Bamberg plate archives: A status report
The Bamberg plate archives are currently being digitized In the context of a joint project with our partners in Hamburg and Potsdam.
The data are integrated into the APPLAUSE data base. I give a status report and an outlook on the plans for the complete integration of the Bamberg archives.
Elizabeth Griffin: Digitizing Astronomical Spectra
The specific requirements for the accurate translation of photographic spectra into electronic formats are discussed critically, and prioritized. The digitizing equipment that can meet these requirements is specialized, and must be designed accordingly.
René Hudec: Long Term Optical Data for X Ray Monitors (poster)
Co-authors: Hudec L., Skala P.
The X ray monitors of Lobster Eye in recent developments are expected to provide long term X ray (years and more) data for many celestial objects emitting soft X rays with emphasis on variable and transient sources. Most of these X ray sources are also sources of (variable) optical emission which is correlated with X ray emission. The knowledge of the very long term evolution of sources is important to understand the physical processes more... involved. The digitized astronomical archival plates represent unique data source for such long term analyses and correlations.
Florian Rothmaier: The Wide-Field Plate Database in the Virtual Observatory
In recent years, great efforts were made to digitise photographic plate archives all over the world, and thus to stop the degradation of this considerable part of our cultural heritage. In Heidelberg, the digitisation of the Heidelberg Königstuhl Archives that encompasses more than 25000 photographic plates dating from the late 19th century to our days accompanied by a unique collection of observation logs was extended to some hundreds plates of Max Wolf\'s uranograph and may now be considered completed.
An attractive more... possibility to discover the Heidelberg Königstuhl Archive and numerous other plate archives world-wide is offered by the Wide Field Plate Database (WFPDB, Tsvetkov et al., 1995). It is a comprehensive database giving the spatial, temporal, and spectral coverage of currently about 600000 astronomical photographic plates. Since technically the WFPDB simply is a table, the natural Virtual Observatory (VO) approach to provide its data is the Table Access Protocol (TAP).
In our contribution, we aim at illustrating how the German Astrophysical Virtual Observatory (GAVO) has ingested WFPDB data into its TAP service. We will describe the table structure used and will show with some interesting examples how to use this service.
Aimo Sillanpää: Tuorla Observatory Plate Collection
I will very briefly discuss the Tuorla Observatory astronomical plate collection.
Kundera Tomasz: Current status of digitizing Polish astroplate archives
Authors: E.Kuligowska, T.Kundera, G.Stachowski, D.Woltański
Three years ago, after several years of collecting information
about Polish astrographic-plate archives, we began digitising them. The number of plates is sufficiently large that the scanning process is still ongoing. Here, we would like to present the current state of the project: what we have already achieved, how we deal with the plates and scanned images and the problems we have encountered so far.
Hippke Michael: KIC 8462852 did likely not fade during the last 100 years
A recent analysis found a ``completely unprecedented\'\' dimming of $0.165\\pm0.013$ magnitudes per century in the F3 main sequence star KIC8462852. This star is interesting, as it shows episodes of day-long dips with up to 20\\% dimming of unknown origin. We re-analyze the same Harvard archival Johnson B photometry and find serious issues in the data processing techniques used for KIC8462852. These errors include a hard cut of all data points with magnitudes dimmer than B$\\sim$12.5, leading to a skewed distribution more... and incorrect error estimates of the trend. A cross-check of other stars in the Kepler field of view shows similar data quality issues with a strong dependency on quality-cuts, leading to arbitrary results. We conclude that the Harvard plates photometry is limited to an accuracy of $\\sim0.1$mag per century (1889--1990), which is confirmed by other studies and which does not allow for a discovery of a dimming trend at the same level. The most likely explanation for the century-long trend of KIC8462852 is thus a data artifact, in the form of a structural break, and it is probably not of astrophysical origin.
Elżbieta Kuligowska: Images of comets on archival photographic plates from the Jagiellonian University Observatory (poster)
Authors: G.Stachowski, E.Kuligowska, T.Kundera, B.Dębski and K. Bajan
Of the surviving photographic plates at the Astronomical Observatory of the Jagiellonian University, recently scanned as part of the AstroGrid-PL project, some record observations of comets. In the poster we present some examples from plates made with the Zeiss Tessar Astrograph.
Frank Matthai: no presentation
Sara Schechner: On Preserving Annotations on Astronomical Plates and Their Enclosures
This paper will present the results of a recent survey of professional astronomers and historians on the scientific and historical importance of annotations on astronomical photographic plates and their jackets. A strong case is made for not removing them during preservation and digitization. If erasure is necessary, then photographic documentation of the annotations is essential. Recommendations for handling and cleaning the plates, photographing any annotations, and rehousing them will be shared.
Blanka Hnulíková: Assessment of the status of photographic plates from the Weinek archives (poster)
The archive contains positives and negatives with glass support, even autochrome. The evaluation assessed the degree of mechanical, chemical and biological damage.
DANIELA VOKOUNOVÁ: no presentation