ASTROSAT CZTI

Data Quality Report

Orbit 51671

Creation date: 2025-04-22T12:01:03.405467
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/AS1A13_031T01_9000006462_51671cztM0_level2.fits modeM0/AS1A13_031T01_9000006462_51671cztM0_level2_quad_clean.evt
Size (bytes)847,938,24085,734,720
Size808.7 MB 81.8 MB
Events in quadrant A9,295,535511,092
Events in quadrant B5,855,853674,133
Events in quadrant C11,777,141326,555
Events in quadrant D3,915,625594,918

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B0100
C0100
D0100

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0324302
B0221692
C03967710
D0166052

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01420

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7021201328.671129%
B702172510.326164%
C7020357750.954416%
D70202824.017094%

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 7916 7021 1713 1713 21.64% 24.40%
B 7916 7021 450 450 5.68% 6.41%
C 7914 7019 3499 3499 44.21% 49.85%
D 7915 7020 148 148 1.87% 2.11%

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 7 64 5199458 30620.97 696 678 169.8
A 12 3 377452 2219.21 696 678 169.8
A 3 14 254015 1492.16 696 678 169.8
B 5 172 1347428 8404.31 749 722 160.2
B 1 223 342929 2135.59 749 722 160.2
B 10 128 176999 1100.08 749 722 160.2
C 5 250 7022424 52670.36 489 485 133.3
C 15 189 2187251 16402.55 489 485 133.3
C 0 192 179167 1340.26 489 485 133.3
D 3 12 228066 1108.35 749 720 205.1
D 2 120 171182 831.03 749 720 205.1
D 8 176 99701 482.55 749 720 205.1

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