EUVERAP1 - EUVE Right Angle Program, 1st Catalog

Overview

This table contains the detections of 114 extreme-ultraviolet (EUV; 58 - 740 Angstrom) sources, of which 99 are new serendipitous sources, based on observations covering approximately 8% of the sky which were made with the imaging telescopes on board the Extreme Ultraviolet Explorer (EUVE) during the Right Angle Program (RAP). These data were obtained using the survey scanners and the Deep Survey instrument during the first year of the spectroscopic guest observer phase of the mission, from January 1993 to January 1994. The data set consists of 162 discrete pointings whose exposure times are typically two orders of magnitude longer than the average exposure times during the EUVE all-sky survey. Based on these results, the authors expect that EUVE will serendipitously detect approximately 100 new EUV sources per year, or about one new EUV source per 10 square degrees, during the guest observer phase of the EUVE mission. New EUVE sources of note include one B star and three extragalactic objects. The B star (HR 2875, EUVE J0729 - 38.7) is detected in both the Lexan/B (approximately 100 A) and Al/Ti/C (approximately 200 A) bandpasses, and the detection is shown not to be a result of UV leaks. The authors suggest that they are detecting EUV and/or soft x rays from a companion to the B star. Three sources, EUVE J2132+10.1, EUVE J2343-14.9, and EUVE J2359-30.6 are identified as the active galactic nuclei MKN 1513, MS2340.9-1511, and 1H2354-315, respectively.

Some of the EUV sources have two or more alternative source identifications suggested for them in this catalog. Notice that, in such cases, the HEASARC has followed the structure of the original catalog as given in Table 2 of the reference paper, and lists separate entries for these alternative identifications. Thus, there are 152 entries in this database table, corresponding to 114 EUV sources.

The characteristics of the 6 EUVE filters are listed in Table 1 of the reference paper (q.v.).

Catalog Bibcode

1994AJ....108.1843M

References

Serendipitous EUV sources detected during the first year of the Extreme
Ultraviolet Explorer right angle program

    McDonald K., Craig N., Sirk M.M., Drake J.J., Fruscione A., Vallerga J.V.,
    Malina R.F.
    <Astron. J, 108, 1843-1853 (1994)>
    =1994AJ....108.1843M        (SIMBAD/NED BibCode)

Provenance

This table was created by the HEASARC in February 2013 based on an electronic version of Table 2 from the reference paper which was supplied by Damian Christian (many thanks, Damian!) and extensively edited by the HEASARC, mostly to conform with the printed version. In 4 cases, the printed table was clearly incorrect, and a trailing 'B' from the alt_id_name was transposed to the type field. We have corrected these errors thus:

     Printed table      As corrected in this table

alt_id_name      type      alt_id_name       type

HD 22468          B ?      HD 22468 B         ?
IDS 04199+1543    B ?      IDS 04199+1543 B   ?
HD 29763          B ?      HD 29763 B         ?
IDS 05264-0341    B ?      IDS 05264-0341 B   ?

Because of the amount of hand-editing which was done, the user should treat the contents of this table with some caution and should cross-check its contents with the printed table.

Parameters

Name
The name of the EUVE source based on its position in J2000.0 equatorial coordinates, e.g., 'EUVE J0036+33.7'. For sources previously reported in the EUVE Bright Source List (Malina et al. 1994, AJ, 107, 751) or the First EUVE Source Catalog (Bowyer et al. 1994, ApJS, 93, 569), the names from these prior catalogs are used.

RA
The Right Ascension of the EUVE source in the selected equinox. This was given in J2000.0 equatorial coordinates with a precision of 1 second of time in the original table.

Dec
The Declination of the EUVE source in the selected equinox. This was given in J2000.0 equatorial coordinates with a precision of 1 arcsecond in the original table.

LII
The Galactic Longitude of the EUVE source.

BII
The Galactic Latitude of the EUVE source.

Le_Count_Rate
The Scanners A & B Lexan/B filter (58-174 Angstroms) count rate, in ct/ksec. The count rates are only quoted if they are greater than 3 sigma.

Al_Count_Rate
The Scanners A & B Al/Ti/C filter (156-234 Angstroms) count rate, in ct/ksec. The count rates are only quoted if they are greater than 3 sigma.

Dag_Count_Rate
The Scanner C 'Dagwood' filter (Ti/Sb/Al, 345-605 Angstroms) count rate, in ct/ksec. The count rates are only quoted if they are greater than 3 sigma.

Tin_Count_Rate
The Scanner C 'Tin' filter (Sn/SiO, 500-740 Angstroms) count rate, in ct/ksec. The count rates are only quoted if they are greater than 3 sigma.

Dsl_Count_Rate
The Deep Survey Lexan/B filter (DSL, 67-178 Angstroms) count rate, in ct/ksec. The count rates are only quoted if they are greater than 3 sigma.

Dsa_Count_Rate
The Deep Survey Al/C filter (DSA, 157-364 Angstroms) count rate, in ct/ksec. The count rates are only quoted if they are greater than 3 sigma.

Qflag
The quality of the identification, coded as '1' for 'probable', (identifications that should be reasonably secure because they satisfy one or more of the 4 criteria discussed in Section '2' of the reference paper, with a false identification rate of less than 1% for identifications within a 3 arcminute error circle), 2 for 'possible' (included for completeness for sources with no probable counterparts: these correspond to catalog objects that are plausible EUV sources but for which there is insufficient information to further judge their likelihood of high EUV luminosity) and U for possible UV leak), and 'U' if an appreciable portion of the Lexan/B filter counts listed may be caused by the known UV leak of this filter (early-type stars hotter than early A or late B spectral types have sufficient UV emission to be detected down to V ~ 8-9 during long, continuous pointings). A comprehensive discussion of this UV transmission is in the Appendix of the reference paper.

ID_Name
The name of the candidate counterpart to the EUV source. In the case of multiple identifications where an identification quality (qflag) is assigned to more than 1 source, the object that was deemed most likely to be the brightest EUV source has qflag = 1. In the case of multiple listings for the same source where only one object has an assigned qflag value, the other objects were deemed to be of potential relevance or interest to the EUV source or principal candidate counterpart.

Alt_Id_Name
An alternative name of the candidate counterpart identification.

Type
The source type of the candidate counterpart, usually the spectral type for stellar counterparts, and the source class if not. For the latter, the following abbreviations are used:

  CSPN:   central star of planetary nebula
  CV:     cataclysmic variable
  GCl:    cluster of galaxies
  Sy1:    Seyfert Type 1

Broad_Type
The general source class of the candidate counterpart, using in most cases the SIMBAD object classification standard names (see the list at http://simbad.u-strasbg.fr/simbad/sim-display?data=otypes), e.g., '*in**' for a star in double system, '*inCl' for a star in a cluster, 'X' for an X-ray source, etc.

App_Mag
The V or B apparent magnitude of the candidate counterpart. V magnitudes are quoted unless otherwise noted in the app_mag_flags parameter.

App_Mag_Flags
This parameter contains flags pertaining to the quoted apparent magnitude.

Offset
The angular separation between the EUVE RAP source and its identification, in arcseconds.

Notes
Notes concerning the EUVE source, its identification(s) and/or the hydrogen column density NH in its direction. The abbreviations used in the notes include:

      1E  =1979ApJ...234L...1G First Einstein survey (Giacconi et al. 1979)
      1M  =1979ApJS...39..573M MIT/OSO 7 Catalog of X-ray sources
           (Markert et al. 1979)
    1XRS  =1979ApJS...41..327A Catalog of X-ray sources (Amnuel et al. 1979)
      3A  =1981MNRAS.197..865W Ariel-V (3A) Catalog of X-ray sources
           (Warwick et al. 1981)
      4U  =1978ApJS...38..357F Fourth Uhuru Catalog (Forman et al. 1978)
     BPM  = Bruce Proper Motion Survey (Luyten 1959, 1963)
     CBS  = Case Northern sky survey blue stars (Pesch and Sanduleak 1986)
     CEL  = Celescope Catalog of UV magnitudes (Davis et al.1973)
      Ci  = Cincinnati Obs. Catalogs of proper-motion stars
            (Porter et al. 1918, 1930)
     EXO  = EXOSAT sources (Andrews 1984)
      FB  = Faint blue halo stars (Greenstein and Sargent 1984)
    [FN]  = Footnote on specific source or identification in the notes to Table
            2 in the printed version of the reference paper (q.v.).
       G  = Lowell proper-motion stars (Giclas et al.1959)
      GJ  = Third Catalog of Nearby Stars (Gliese and Jahreiss 1991)
       H  = HEAO A-2 hard X-ray sources (Marshall et al. 1979)
      HZ  = Faint blue stars (Humason and Zwicky 1947)
       L  = Stars with proper motion exceeding 0.5" annually (Luyten 1942)
     LFT  = Luyten Five Tenths proper motion survey (Luyten 1955)
     LHS  = Stars with proper motion exceeding 0.5" annually (Luyten 1976)
      LP  = Luyten (1963)
     LPM  = Stars with proper motion exceeding 0.5" annually (Luyten 1967)
     LTT  = Luyten Two Tenths proper motion survey
            (Luyten 1957, 1961, 1962, 1972)
     PHL  = Faint blue stars near the South Galactic Pole (Haro and Luyten 1962)
     PLX  = General Catalog of Trigonometric Stellar parallaxes (Jenkins 1952)
      PM  = SIMBAD-classified proper-motion stars
      RE  = ROSAT Wide Field Camera EUV sources (Pounds et al. 1993)
    STR1  = Catalog of Chromospherically Active Binary Stars
            (Strassmeier et al. 1988): systems with single-lined spectra
    STR2  = Catalog of Chromospherically Active Binary Stars
            (Strassmeier et al. 1988): systems with double-lined spectra
     TD1  = TD1 UV satellite survey (Carnochan and Wilson 1983)
      US  = Faint blue objects at high galactic latitude (Usher 1981)
     VVO  = Van Vleck Observatory parallaxes and proper motions
            (Grossenbacher et al. 1968)

Vignetting_Flag
This flag is set to a non-blank value if it is or may be affected by vignetting. A value of 'V' (a dagger symbol in the printed table) indicates that the count rates for the source are only accurate to 50% because of systematic errors in the vignetting correction. A value of 'VV' (two dagger symbols in the printed table) indicates that the source was in a highly vignetted region of the detector and the count rates for the source are only accurate to <= 80% because of large systematic errors

Class
The HEASARC Browse object classification based on the type parameter value, else on the broad_type parameter value

Contact Person

Questions regarding the EUVERAP1 database table can be addressed to the HEASARC Help Desk.

Page Author: Browse Software Development Team
Last Modified: Monday, 16-Sep-2024 17:27:06 EDT