ASTROSAT CZTI

Data Quality Report

Orbit 52018

Creation date: 2025-05-11T03:06:22.109784
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_011T06_9000006468_52018cztM0_level2.fits modeM0/AS1C09_011T06_9000006468_52018cztM0_level2_quad_clean.evt
Size (bytes)860,558,40079,464,960
Size820.7 MB 75.8 MB
Events in quadrant A6,107,590543,605
Events in quadrant B5,717,221601,117
Events in quadrant C9,627,193419,556
Events in quadrant D9,922,553406,634

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0223991
B0213701
C0329381
D0338688

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A623092514.847512%
B623175412.100786%
C6231222435.692505%
D6230200032.102729%

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 7425 6231 625 625 8.42% 10.03%
B 7426 6232 375 375 5.05% 6.02%
C 7426 6232 2223 2223 29.94% 35.67%
D 7425 6231 2221 2221 29.91% 35.64%

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 2 48 1824836 11885.89 611 597 153.5
A 4 95 1294408 8429.87 611 597 153.5
A 4 3 222208 1443.91 611 597 153.5
B 5 185 1038648 7796.64 632 611 133.1
B 12 18 836411 6277.65 632 611 133.1
B 7 0 361237 2708.64 632 611 133.1
C 15 224 4717045 29654.55 571 566 159.0
C 4 5 1150668 7231.19 571 566 159.0
C 9 38 631387 3966.25 571 566 159.0
D 6 42 2097164 13047.81 560 534 160.7
D 12 17 1822215 11336.74 560 534 160.7
D 15 94 1311292 8157.15 560 534 160.7

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