ASTROSAT CZTI

Data Quality Report

Orbit 51926

Creation date: 2025-05-04T23:51:19.683291
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_011T05_9000006466_51926cztM0_level2.fits modeM0/AS1C09_011T05_9000006466_51926cztM0_level2_quad_clean.evt
Size (bytes)1,072,990,08069,022,080
Size1023.3 MB 65.8 MB
Events in quadrant A8,830,547476,394
Events in quadrant B8,968,367433,678
Events in quadrant C10,061,916396,369
Events in quadrant D11,362,627333,954

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0307411
B0310961
C0343751
D0382031

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6432165125.668532%
B6433236536.763563%
C6433256039.794808%
D6432286844.589552%

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 7321 6431 1562 1562 21.34% 24.29%
B 7323 6433 2085 2085 28.47% 32.41%
C 7322 6432 2307 2307 31.51% 35.87%
D 7322 6432 2895 2895 39.54% 45.01%

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 4 95 3798084 25214.95 601 586 150.6
A 12 3 1610249 10687.98 601 586 150.6
A 7 64 237634 1573.97 601 586 150.6
B 10 44 2950478 24943.39 550 531 118.3
B 4 206 2753469 23277.57 550 531 118.3
B 12 32 303967 2565.71 550 531 118.3
C 15 224 5171137 33121.32 553 548 156.1
C 15 218 808031 5172.51 553 548 156.1
C 0 193 524358 3355.38 553 548 156.1
D 12 17 6000475 39922.59 521 499 150.3
D 2 172 1366371 9088.23 521 499 150.3
D 6 42 1060536 7053.27 521 499 150.3

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