ASTROSAT CZTI

Data Quality Report

Orbit 20210420_A10_071T08_9000004326_level2

Creation date: 2025-12-24T22:44:30.514894
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/AS1A10_071T08_9000004326cztM0_level2.fits modeM0/AS1A10_071T08_9000004326cztM0_level2_quad_clean.evt
Size (bytes)74,790,72045,118,080
Size71.3 MB 43.0 MB
Events in quadrant A459,416218,778
Events in quadrant B433,582215,777
Events in quadrant C442,000203,335
Events in quadrant D388,940185,926

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01580
B01580
C01580
D01580

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0158610
B0233500
C0161660
D0177280

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7784380.488181%
B7784811.040596%
C7784770.989209%
D77841021.310380%

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 8754 7784 0 0 0.00% 0.00%
B 8754 7784 0 0 0.00% 0.00%
C 8754 7784 0 0 0.00% 0.00%
D 8754 7783 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 29 467 11.23 119 112 31.6
A 14 79 343 7.31 119 112 31.6
A 7 110 342 7.28 119 112 31.6
B 2 9 337 9.1 114 109 25.1
B 5 232 290 7.22 114 109 25.1
B 3 17 290 7.22 114 109 25.1
C 1 80 321 6.7 116 109 31.7
C 9 209 313 6.45 116 109 31.7
C 3 158 310 6.35 116 109 31.7
D 15 46 317 6.89 111 101 31.4
D 6 231 294 6.15 111 101 31.4
D 3 14 291 6.06 111 101 31.4

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