ASTROSAT CZTI

Data Quality Report

Orbit 55639

Creation date: 2026-01-13T14:31:35.725865
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_021T06_9000006538_55639cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55639cztM0_level2_quad_clean.evt
Size (bytes)544,115,520109,589,760
Size518.9 MB 104.5 MB
Events in quadrant A5,517,294701,771
Events in quadrant B3,426,385779,714
Events in quadrant C4,427,149672,026
Events in quadrant D6,162,175619,228

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0220562
B0162430
C0191020
D0238500

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01580
B01580
C01580
D01580

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A78393234.120424%
B7839280.357188%
C78391762.245184%
D78394645.919122%

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 7839 7839 308 308 3.93% 3.93%
B 7839 7839 3 3 0.04% 0.04%
C 7839 7839 187 187 2.39% 2.39%
D 7839 7839 487 487 6.21% 6.21%

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 12 115 1079662 5479.79 801 781 196.9
A 0 8 992066 5034.88 801 781 196.9
A 8 249 141862 716.57 801 781 196.9
B 5 185 89167 517.44 800 770 170.8
B 7 252 49663 286.2 800 770 170.8
B 7 0 29252 166.72 800 770 170.8
C 13 3 482782 2275.82 778 768 211.8
C 9 38 441965 2083.11 778 768 211.8
C 15 148 174677 821.11 778 768 211.8
D 11 129 1075987 4907.67 773 739 219.1
D 8 245 882198 4023.18 773 739 219.1
D 8 160 223471 1016.6 773 739 219.1

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