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HRIEXO: Help

HRIEXO - Einstein Catalog HRI ESTEC Sources


Overview

The Einstein High Resolution Imager (HRI) consisted of a micro-channel plate. This database table has been generated at the EXOSAT observatory by automatically processing all the HRI images. Both the images and detected sources are available. This catalog has not been cleaned or checked. Users should beware of two possible problems: (1) spurious detections caused by extended sources have not been checked, and (2) there may be a one-pixel offset in some positions. For HRI images, one pixel is one arcsecond. (The images are rebinned from the original 0.5 arcseconds.)

Parameters

_100_Micron_IRAS_Flux
IRAS Flux in Band 4

_12_Micron_IRAS_Flux
IRAS Flux in Band 1

_25_Micron_IRAS_Flux
IRAS Flux in Band 2

_5GHz_Radio_Flux_Density
Radio Flux Density (mJy) (5GHz)

_60_Micron_IRAS_Flux
IRAS Flux in Band 3

Background
Background Counts per Square Pixel

BII
The galactic latitude of the source, or pointing position (see RA and Dec).

BV_Color
B-V Color of Counterpart

Class
Browse Object Classification

Count_Rate
The count rate per second. This is the raw rate and it has NOT been corrected for vignetting, point spread function etc.

Count_Rate_Error
Count Rate Error

Day_End
The day when the observation ended.

Day_Start
The day on which the observation started.

Dec
The `Dec` is that of the detected source if the sample is not TARGETS or TOTAL. It is the coordinates of the pointing position if the sample is TARGETS. For the latter sample the `count rate` equals -1.0.

End_Time
Start Time of the Observation

Exposure_Time
The total on-source exposure time, in seconds.

Extension_Flag
1 if extended, 0 otherwise

File_Image
The name of the file containing the image. The images are not available.

Flux_Error
The uncertainty in the 0.1-4.0keV flux.

Hour_End
The hour when the observation ended.

Hour_Start
The hour at which the observation started.

LII
The galactic longitude of the source, or pointing position (see RA and Dec).

Limage
Max Length of Image Name in Characters

Minute_End
Minute of End Time

Minute_Start
Minute of Start Time

Name
The name parameter is not filled in, currently it holds the date when the automatic analysis was run. This may be updated at some point.

NH_21cm
NH (21 cm)

Nimage
Number of Images

Obox
Optimum Box Size (1 sec pixels)

Off_Axis_Angle
Off-Axis Angle

Position_Error
Position Error

Processed_Date
Date of Auto Run

Qflag_HRI
Quality Flag HRI $$ if unusable

RA
The `RA` is that of the detected source if the sample is not TARGETS or TOTAL. It is the coordinates of the pointing position if the sample is TARGETS. For the latter sample the `count rate` equals -1.0.

Radio_Flag
Flag for Radio

Rates_Files_ID
Rates File Id

Redshift
Redshift of Counterpart

Roll_Angle
Roll Angle

Seconds_End
The seconds when the observation ended.

Seconds_Start
The seconds at which the observation started.

Sequence_Number
The sequence number of the observation.

Significance
Source Significance

Time
Start Time of the Observation

UB_Color
U-B Color of Counterpart

Unknown_Radio_Flux_Densi
Radio Flux Density (mJy) (?GHz)

Vmag
V Magnitude of Counterpart

X_Pixels
The X pixels of the detected source.

Y_Pixels
The Y pixels of the detected source.

Year_End
The year when the observation ended.

Year_Start
The year in which the observation started.


Contact Person

Questions regarding the HRIEXO 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
 
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