ASTROSAT CZTI

Data Quality Report

Orbit 20171027_A04_080T01_9000001644_level2

Creation date: 2025-11-18T00:54:06.389642
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_080T01_9000001644cztM0_level2.fits modeM0/AS1A04_080T01_9000001644cztM0_level2_quad_clean.evt
Size (bytes)169,410,240150,655,680
Size161.6 MB 143.7 MB
Events in quadrant A1,013,966880,885
Events in quadrant B974,638830,948
Events in quadrant C1,029,158861,733
Events in quadrant D822,476698,745

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0454730
B0505750
C0381880
D0842870

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03800
B03800
C03800
D03800

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0260
B0260
C0260
D0260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A187105112.731160%
B1871012846.862640%
C18710890.475681%
D1871014557.776590%

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 21295 18709 0 0 0.00% 0.00%
B 21295 18706 0 0 0.00% 0.00%
C 21295 18710 0 0 0.00% 0.00%
D 21295 18630 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 29 947 10.17 264 246 68.9
A 7 110 826 8.41 264 246 68.9
A 9 19 788 7.86 264 246 68.9
B 2 9 867 11.46 257 244 54.4
B 3 17 654 7.54 257 244 54.4
B 5 128 651 7.49 257 244 54.4
C 1 80 808 7.7 271 250 72.5
C 1 81 792 7.48 271 250 72.5
C 12 241 715 6.42 271 250 72.5
D 6 231 659 6.89 234 213 64.7
D 7 5 642 6.63 234 213 64.7
D 3 14 640 6.6 234 213 64.7

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