HSC Search Output Columns


This document defines the catalog entries describing the HSC Detailed Catalog.

Mark
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.

To Retrieve:
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.

To Coplot:
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.

Plot range
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.

Plot dimensions
Adjust the X size and Y size in pixels to create the size of plot desired. The maximum dimensions are 850 by 640 pixels.

Redraw plot
Use this button to replot the spectra when you have changed the plot range or plot dimensions.

Column Information

CatID
Unique identifier for each catalog entry
Range: 1 to > 62081749

MatchID
identifier for the match
Range: 1 to > 27028396

MemID
Unique identifier for each source of a match
Range: 1 to > 346

SourceID
Source identifier from white light (detection) image
Range as of May 1st,2012 was 2102514166 to 4667808271

ImageID

Range 1 to > 1018479

Det
Is source detected in this observation ?
Y or N

MatchRA(J2000)
Right Ascension for the match
Range 0 to 360 deg

MatchDec(J2000)
Declination for the match
Range: -90 to +90 deg

SourceRA(J2000)
Right Ascension for this source detection
Range 0 to 360 deg, null is source was not detected.

SourceDec(J2000)
Declination for this source detection
Range: -90 to +90 deg, null is source was not detected.

D
Distance from source position to the match position in milli arc seconds (mas)
Range: currently 0 to 81.49

Dsigma
Std dev of the distance (D) between source and match positions in mili arcsec (mas)
Range: currently 0 to 54.78

AbsCorr
Was absolute astrometry correction made ?
Y or N

Ximage
X position of source in image coordinates
Range: currently 12.67 to 7464.64

Yimage
Y position of source in image coordinates
Range: currently 12.24 to 7328.75

ImageName
HLA image Name

Instrument
Name of instrument
Examples: ACS

Mode
Observing mode
Example: ACCUM

Detector
Detector
Example: ACS/WFC

Aperture
Aperture
Example: WFC1

ExpTime
Exposure time
Range: currently 0.1 to 26400 sec

StartTime
Observation start time
Range currently 1989-11-30 to 2010-02-12

StartMJD
Observation start time in MJD

StopTime
Observation stop time
Range: currently 1993-12-20 to 2010-02-12

StopMJD
Observation stop time in MJD

Wavelength
Pivot wavelength in Angstroms
Range: currently 1322 to 10228 A

Filter
Filter
Examples: F625W

Target Name
Target Name for this observation
Examples: NGC6341

FluxAper2
Count rate with an aperture radius 0.3 arcsec (WFPC2), 0.15 arcsec (ACS, WFC3/UVIS) and 0.45 arcsec (WFC3/IR)
Range: currently 0.001 to 10437600

MagAper2
Magnitude with an aperture radius 0.3 arcsec (WFPC2), 0.15 arcsec (ACS, WFC3/UVIS) and 0.45 arcsec (WFC3/IR)
Range: currently 1.85 to 35.98

MagAuto
Estimated total magnitude using Source Extractor algorithm
Range: currently 2.24 to 28.60

PropID
HST proposal number
Examples: currently 1070 to 12007

CI
Concentration Index - difference between magntiude in small and large apertures
Examples: currently 0.65 to 93.55

KronRadius
Mean value of the Kron Radius from Source Extractor

Flags
Bit encoded flag: bit 0 (value 0) = point source, (value 1) = extended, bits 1 or 2 (values 2 or 4) = saturated