ASTROSAT CZTI

Data Quality Report

Orbit 20180526_G08_075T01_9000002120_level2

Creation date: 2021-08-28T19:14:11.360795
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1G08_075T01_9000002120cztM0_level2_bc.evt modeM0/AS1G08_075T01_9000002120cztM0_level2_quad_clean.evt
Size (bytes)1,898,104,320504,002,880
Size1.8 GB 480.7 MB
Events in quadrant A8,749,1603,284,449
Events in quadrant B11,389,3503,214,995
Events in quadrant C11,664,9003,174,504
Events in quadrant D22,992,8682,881,720

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08060
B08060
C08060
D08060

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0827180
B0944080
C0925600
D01279610

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0550
B0550
C0550
D0550

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A394268152.067164%
B3942617984.560442%
C394266551.661340%
D39426606715.388322%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 56148 39424 23 23 0.04% 0.06%
B 56148 39421 75 75 0.13% 0.19%
C 56148 39424 2 2 0.00% 0.01%
D 56148 39422 4246 4246 7.56% 10.77%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 8 15 278897 594.91 2122 2084 465.3
A 12 189 117410 247.85 2122 2084 465.3
A 15 69 78045 163.25 2122 2084 465.3
B 10 245 2054370 5172.73 2089 2042 396.8
B 0 229 397572 996.9 2089 2042 396.8
B 0 189 298172 746.37 2089 2042 396.8
C 3 233 3635201 8159.78 2036 2014 445.3
C 3 232 23702 48.71 2036 2014 445.3
C 14 234 18921 37.97 2036 2014 445.3
D 1 52 11099616 23691.25 1894 1841 468.4
D 12 110 2681016 5719.43 1894 1841 468.4
D 2 120 753410 1604.43 1894 1841 468.4

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter