LEDAS  
Leicester Database and Archive Service
 
ARNIE Index
ARNIE Help
ARNIE Tutorial
Search...
All databases
All helpfiles
Line
Footer
E-mail

UIT: Help

UIT - Ultraviolet Imaging Telescope Near-UV Bright Objects Catalog


Overview

The Ultraviolet Imaging Telescope (UIT) Near-UV Bright Objects Catalog is a photometric catalog of 2244 objects detected by the UIT in the near-ultraviolet (NUV; 1650A<lambda<2900A) during the Astro-1 Space Shuttle mission. Sources in the catalog are as faint as near-UV magnitude m_nuv of about 18.8, or near-UV flux f_nuv ~ 1.1x10^-16ergs/s/cm^2/A, but the survey is not complete to this level. Optical catalogs were used to cross identify sources and derive near-UV to Johnson V colors. A majority of the objects (88%) do indeed have proposed optical identifications from catalogs, and most are stars. The authors' purpose in creating the catalog was to form a database useful for identifying very blue objects and for performing Galactic UV stellar population studies.

Catalog Bibcode

1996ApJS..104..287S

References

Ultraviolet imaging telescope near-ultraviolet bright object catalog.
 Smith E.P., Pica A.J., Bohlin R.C., Cornett R.H., Fanelli M.N.,
 Landsman W.B., O'Connell R.W., Roberts M.S., Smith A.M., Stecher T.P.
 <Astrophys. J. Suppl. Ser. 104, 287 (1996)>
 =1996ApJS..104..287S      (SIMBAD/NED BibCode)

Provenance

This database was created by the HEASARC in November 2000 based on a machine-readable version obtained from the CDS (Catalog J/ApJS/104/287).

UIT Pointings in Catalog

Table 1 of the published paper:
    RA  (2000) Dec      Target      Exposure    Filter   Frame
                                      (s)
00 06 19.5 +20 12 10.5  Mkn 335       294.5       A1      410
00 47 35.4 -25 17 20.0  NGC 253       275.5       A5      291
01 36 38.6 +15 48 45.8  M74           530.5       A1      161
02 22 34.0 +42 20 56.3  NGC 891       437.5       A1      307
02 42 40.7 -00 00 47.6  NGC 1068      752.5       A1      303
03 19 48.2 +41 30 42.4  Perseus       564.5       A1      384
03 22 54.6 -37 09 22.1  NGC 1316      545.5       A1      425
03 36 47.3 +00 35 17.6  HR1099        598.7       A1       13
03 38 29.0 -35 26 57.9  NGC 1399     1099.5       A1      216
04 06 08.1 +62 06 06.8  HD25443        12.2       A1      286
04 14 15.7 -12 44 21.9  NGC 1535      181.5       A1      283
05 05 30.7 +52 49 54.8  G191B2B       215.5       A1       82
05 14 08.1 -40 03 06.1  NGC 1851      543.5       A1      342
05 24 10.5 -24 31 27.3  M79           298.5       A1      124
05 34 29.2 +22 00 38.7  Crab Nebula   470.5       A1       94
05 55 10.2 +07 24 25.0  Alp-Ori       578.5       A5      449
05 59 47.4 -50 26 51.3  0558-504      161.5       A5      120
06 18 37.6 +78 21 18.9  NGC 2146      442.5       A1      437
06 28 17.4 -13 03 10.9  HD45677       660.5       A1      153
07 42 37.1 -42 13 48.9  HD62542       184.5       A1      311
07 55 05.4 +22 00 06.9  U-Gem         552.5       A1      433
08 15 18.9 -49 13 18.7  C48D1557        2.8       A5      417
08 25 13.0 +73 06 40.4  Z-Cam         454.5       A1      380
08 30 50.9 +65 50 34.0  Abell 665     549.5       A1      353
08 34 30.1 -46 14 56.3  Vela SNR E     51.6       A1      190
09 45 41.3 -14 19 40.1  NGC 2992      256.5       A1       90
09 55 33.5 +69 03 59.8  M81           639.5       A1      442
09 55 53.0 +69 40 10.0  M82           270.5       A1      194
11 44 29.5 +19 50 20.7  Abell 1367    105.5       A1      184
12 10 32.6 +39 24 20.8  NGC 4151      239.5       A1      295
12 22 55.1 +15 49 22.3  M100          226.5       A5      157
12 29 06.7 +02 03 08.4  3C273           9.9       A1      150
12 30 49.3 +12 23 28.2  M87            70.5       A1      113
13 16 22.4 +29 05 56.4  HZ43          100.5       A5      274
13 36 41.0 +51 54 50.3  UX-UMa        299.5       A1      322
13 42 16.7 +28 26 01.2  M3            199.5       A2      392
16 41 33.7 +36 26 07.4  M13            46.7       A2      346
16 57 49.8 +35 20 32.6  Her-X-1       311.5       A2      165
17 01 00.4 +64 12 09.2  1700+64       744.5       A1      176
18 21 57.2 +64 20 36.9  Q1821         578.5       A1      219
19 00 10.1 +70 39 43.2  G70D8247      559.5       A1      376
20 14 14.5 +28 41 42.2  21Vul         236.5       A5       17
20 43 13.6 +57 06 50.9  HD197770      236.5       A5      101
20 56 02.8 +31 56 39.1  Cyg Loop A    127.5       A1       55
20 57 32.1 +31 07 39.3  Cyg Loop B    127.5       A1      180
21 01 36.9 +68 09 48.1  NGC 7023      546.5       A1      201
21 42 42.3 +43 35 07.8  SS-Cyg        223.5       A1      471
23 25 20.0 -12 07 14.0  Abell 2597    140.5       A1      232

Parameters

Name
The full UIT Catalog Designation constructed using the CDS-recommended prefix 'SPB96' and the running catalog number (ordered in increasing J2000 RA).

RA
The Right Ascension of the source.

Dec
The Declination of the source.

LII
The Galactic Longitude of the source.

BII
The Galactic Latitude of the source.

Catalog_Number
The UIT Catalog entry number, a running number ordered in increasing J2000 RA.

Nuv_Mag
The near-UV aperture magnitude of the source, through a fixed 8 arcsecond aperture. If the source was so bright that it saturated the film (flag_nuv_mag = 'S'), no magnitude is listed. The bulk of the sources (93%) in this catalog are from orbital night images obtained using the A1 filter which has a centroid wavelength of 2248 Angstroms and a width of 1272 Angstroms. The remainder of the sources were observed using either the A2 filter which has a centroid wavelength of 1892 Angstroms and a width of 412 Angstroms or the A5 filter which has a centroid wavelength of 2258 Angstroms and a width of 456 Angstroms. To determine which type of observation applies to a given entry, examine the value of the first digit of the object_type parameter: 1 means filter A1 was used, 2 means filter A2 was used, and 5 means filter A5 was used.

Flag_Nuv_Mag
This is a flag which is set to 'S' for those sources which were so bright that they saturated the film.

Nuv_Mag_Error
The uncertainty in the near-UV magnitude. If an object or its associated sky aperture fell too close to the image edge, no magnitude uncertainty is given. The photometry for these sources, as well as those which were so bright as to saturate the film, should be regarded as uncertain.

Nuv_V_Color
The near-UV to Johnson V-band color, where the near-UV magnitude used to calculate the color is an aperture-corrected total magnitude, and the V magnitude is the catalogued or measured value.

Object_Type
This is a flag containing both the filter used and a crude object classification. The value of the first digit of this parameter is 1 if filter A1 was used, 2 if filter A2 was used, or 5 if filter A5 was used. The value of the second digit of this parameter is 0 for a catalogued stellar identification (either named or from the HST Guide Star catalog), 1 for a nonstellar source, or 2 for a proposed match from the Digitized Palomar Observatory Sky Survey (POSS: 265 such sources).

Notes
The name, if any, of the optical identification, or a brief note about the object. Most of the objects (those with the second digit of their object_type parameter = 0) match stars from the HST GSC, and these names are not listed here.

Frame
The UIT Frame Number Used for the photometry. More information on these frame numbers, e.g., what the corresponding targets were, is listed in the UIT_Pointings_in_Catalog section of this database help.


Contact Person

Questions regarding the UIT database table can be addressed to the HEASARC User Hotline.
If you have any problems, please consult the help page or mail ledas-help@star.le.ac.uk
 
HOME
SEARCH
SERVICES INFO SOFTWARE ViZieR BLASTA DSS
ARCHIVES ASCA CHANDRA GINGA ROSAT ARNIE