ASTROSAT CZTI

Data Quality Report

Orbit 20171020_A04_145T03_9000001624_level2

Creation date: 2025-11-17T20:59:32.460828
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/AS1A04_145T03_9000001624cztM0_level2.fits modeM0/AS1A04_145T03_9000001624cztM0_level2_quad_clean.evt
Size (bytes)68,938,56064,687,680
Size65.7 MB 61.7 MB
Events in quadrant A407,644373,448
Events in quadrant B392,798372,161
Events in quadrant C412,426365,323
Events in quadrant D348,054320,977

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01540
B01520
C01540
D01540

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0216990
B0202510
C0157790
D0204760

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A75565407.146638%
B75355437.206370%
C75762232.943506%
D75695317.015458%

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 7927 7658 0 0 0.00% 0.00%
B 7927 7641 0 0 0.00% 0.00%
C 7927 7672 0 0 0.00% 0.00%
D 7927 7647 0 0 0.00% 0.00%

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 0 29 417 10.78 106 99 29.5
A 14 188 414 10.68 106 99 29.5
A 14 204 371 9.22 106 99 29.5
B 2 9 358 10.91 103 97 23.9
B 5 232 286 7.9 103 97 23.9
B 5 225 285 7.86 103 97 23.9
C 3 158 300 6.52 108 100 30.7
C 12 250 296 6.39 108 100 30.7
C 12 241 293 6.29 108 100 30.7
D 6 231 280 6.67 99 89 28.6
D 7 5 255 5.8 99 89 28.6
D 3 30 253 5.73 99 89 28.6

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