HSC Search Output Columns
This document defines the catalog entries describing
the HSC Data Archive.
Clicking on entries in this column will mark the entry for retrieval.
To mark all entries, click one of the buttons labelled
'Mark All','Mark public', or 'Mark Proprietary'.
(Unmarking all entries can be done the same way
using the appropriate button.)
For missions with proprietary data, the mark button element
will have a yellow background and a '@' symbol to indicate
data sets not yet public.
Click the button labelled 'Submit marked data for retrieval from
STDADS'. This will send all the marked data set names to the
data retrieval page. Follow the directions on the displayed pages.
After selecting up to 15 observations to be plotted, click on
the "Plot marked spectra" button to coplot the selected observations.
The spectra that you selected will be automatically scaled
to the full range of wavelengths and nearly the full range of
fluxes (i.e., y axis plot scale runs from 0 (or .25 * the minimum flux
for spectra with negative fluxes) to the 10th highest flux). Each
spectrum is automatically assigned a color, up to a maximum of 15.
For plotting Kepler light curves, y-axis scaling is slightly different.
Plots scale simply from the minimum to the
maximum flux. It is also recommended that only Kepler light curves
from the same target be co-plotted due to the differences in flux values.
The spectra are labelled by their dataset names, with a
summary of the datasets plotted given below the plot. After inspecting
the plot, you may wish to change the selection of datasets which are
displayed. Use your browser "Back" button to do this.
Adjust the minimum and maximum wavelengths (in Angstroms)
and minimum and maximum fluxes (in erg /cm2/sec/A) to select the
spectral region of interest and to exclude noisy data.
Note Kepler light curves are in units of time and uncalibrated fluxes.
Adjust the X size and Y size in pixels to create the size of plot
desired. The maximum dimensions are 850 by 640 pixels.
Use this button to replot the spectra when you have changed the plot range or plot dimensions.
- Cat ID
- Unique identifier for each catalog entry
Range: 1 to > 62081749
- Match ID
- Catalog entries with the same value of MatchID match together.
Range: 1 to > 27028396
- Mem ID
- Unique identifier for each member of a match
Range: 1 to > 346
- Source ID
- Another identifier
Range as of May 1st,2012 was 2102514166 to 4667808271
- Value = Y is entry is detected and N if source is not detected.
Y or N
- Image ID
- Another identifier
Range 1 to > 1018479
- Target Name
- Target Name
- Image Name
- HLA image Name
- Match RA (J2000)
- Right Ascension for the match
Range 0 to 360 deg
- Match DEC (J2000)
- Declination for the match
Range: -90 to +90 deg
- Source RA (J2000)
- Right Ascension of entry for a detected source.
Range 0 to 360 deg, null is source was not detected.
- Source DEC (J2000)
- Declination of entry for a detected source.
Range: -90 to +90 deg, null is source was not detected.
- Distance in mas from source position (SourceRA, SourceDec) to the match position (MatchRA, MatchDec).
Range: currently 0 to 81.49
- D Sigma
- Standard deviation in mas of source distances from the match position.
Range: currently 0 to 54.78
- X position of source in image coordinates
Range: currently 12.67 to 7464.64
- Y position of source in image coordinates
Range: currently 12.24 to 7328.75
- Name of instrument
- Observing Mode
- Exp Time
- Exposure Time
Range: currently 0.1 to 26400 sec
- Obs. Start Time
- Observation Start Time
Range currently 1989-11-30 to 2010-02-12
- Start MJD
- Observation Start Time (mjd)
- Obs. Stop Time
- Observation Stop Time
Range: currently 1993-12-20 to 2010-02-12
- Stop MJD
- Observation Stop Time (mjd)
- Central wavelength in Angstroms
Range: currently 1322 to 10228 A
- Flux in counts with an aperture radius of 3 pixels, 0.3 arcsec for WFPC2 and 0.15 arcsec for ACS.
Range: currently 0.001 to 10437600
- Magnitude measured with an aperture radius of 3 pixels, 0.3 arcsec for WFPC2 and 0.15 arcsec for ACS.
Range: currently 1.85 to 35.98
- Total magnitude for stellar sources (flags = 0)
Range: currently 2.24 to 28.60
- HST proposal number
Examples: currently 1070 to 12007
- Concentration Index of source defined as the difference between 0.3 and 0.1 arcsec aperture magnitudes.
Examples: currently 0.65 to 93.55
- Value is 0 for a stellar (point) source, and 1 for an extended source.