ASTROSAT CZTI

Data Quality Report

Orbit 52571

Creation date: 2025-06-17T09:04:06.567772
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_9000006478_52571cztM0_level2.fits modeM0/AS1C09_011T06_9000006478_52571cztM0_level2_quad_clean.evt
Size (bytes)671,472,00092,312,640
Size640.4 MB 88.0 MB
Events in quadrant A4,106,133619,308
Events in quadrant B7,832,466627,698
Events in quadrant C5,544,466560,880
Events in quadrant D6,853,528519,269

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0172801
B0279891
C0213951
D0249811

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A67102954.396423%
B671184512.591268%
C671168610.222024%
D671175111.190583%

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 7800 6711 246 246 3.15% 3.67%
B 7801 6712 720 720 9.23% 10.73%
C 7801 6711 643 643 8.24% 9.58%
D 7801 6712 695 695 8.91% 10.35%

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 738218 4301.28 677 660 171.5
A 5 243 420833 2450.36 677 660 171.5
A 4 95 64295 371.11 677 660 171.5
B 10 254 4250810 30019.34 667 643 141.6
B 10 44 219002 1542.29 667 643 141.6
B 4 81 200077 1408.62 667 643 141.6
C 15 248 2390925 13641.62 635 629 175.2
C 13 3 496311 2828.9 635 629 175.2
C 1 45 38029 213.44 635 629 175.2
D 2 62 1649858 8898.5 632 601 185.3
D 8 176 657060 3541.9 632 601 185.3
D 12 17 429225 2312.62 632 601 185.3

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