ASTROSAT CZTI

Data Quality Report

Orbit 57500

Creation date: 2026-05-15T10:26:23.695576
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/AS1A14_113T09_9000006574_57500cztM0_level2.fits modeM0/AS1A14_113T09_9000006574_57500cztM0_level2_quad_clean.evt
Size (bytes)560,122,560111,329,280
Size534.2 MB 106.2 MB
Events in quadrant A4,755,639713,763
Events in quadrant B5,073,643769,117
Events in quadrant C5,445,790684,259
Events in quadrant D4,849,598658,070

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01560
B01560
C01560
D01560

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0199360
B0205641
C0218040
D0200320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A78493945.019748%
B78483724.740061%
C78483764.791030%
D78482152.739551%

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 7849 7849 274 274 3.49% 3.49%
B 7848 7848 184 184 2.34% 2.34%
C 7848 7848 303 303 3.86% 3.86%
D 7848 7848 203 203 2.59% 2.59%

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 13 248 1439781 6991.71 839 817 205.8
A 13 153 30304 143.27 839 817 205.8
A 7 14 13832 63.24 839 817 205.8
B 4 206 1142573 6323.44 833 801 180.6
B 5 185 152090 837.88 833 801 180.6
B 10 247 119649 658.21 833 801 180.6
C 15 224 1851603 8530.35 807 800 217.0
C 13 16 176486 809.73 807 800 217.0
C 14 254 144664 663.07 807 800 217.0
D 8 240 789294 3436.71 815 777 229.4
D 15 142 430844 1874.42 815 777 229.4
D 2 31 101789 440.26 815 777 229.4

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