ASTROSAT CZTI

Data Quality Report

Orbit 52256

Creation date: 2025-07-21T17:16:55.144185
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/AS1C09_011T08_9000006472_52256cztM0_level2.fits modeM0/AS1C09_011T08_9000006472_52256cztM0_level2_quad_clean.evt
Size (bytes)930,487,68094,498,560
Size887.4 MB 90.1 MB
Events in quadrant A4,893,213712,748
Events in quadrant B9,601,497656,781
Events in quadrant C12,746,938312,400
Events in quadrant D6,593,930632,372

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0201200
B0340640
C0433050
D0251120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01580
B01580
C01580
D01580

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A78562653.373218%
B7856166221.155804%
C7857460258.571974%
D78565607.128310%

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 7856 7856 203 203 2.58% 2.58%
B 7856 7856 1049 1049 13.35% 13.35%
C 7857 7856 2500 2500 31.82% 31.82%
D 7856 7856 428 428 5.45% 5.45%

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 3 79 728392 3552.87 818 795 204.8
A 7 206 149325 725.27 818 795 204.8
A 11 3 130006 630.94 818 795 204.8
B 7 0 2545564 15631.44 766 739 162.8
B 12 32 1619140 9940.93 766 739 162.8
B 10 254 1061184 6513.72 766 739 162.8
C 15 158 4807581 31904.0 540 536 150.7
C 15 224 3836823 25461.15 540 536 150.7
C 15 159 432978 2870.09 540 536 150.7
D 11 176 1200593 5348.52 787 750 224.3
D 8 176 617412 2748.88 787 750 224.3
D 15 78 375120 1668.82 787 750 224.3

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