ASTROSAT CZTI

Data Quality Report

Orbit 51976

Creation date: 2025-05-08T07:33:18.742293
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_51976cztM0_level2.fits modeM0/AS1C09_011T06_9000006468_51976cztM0_level2_quad_clean.evt
Size (bytes)737,743,68092,741,760
Size703.6 MB 88.4 MB
Events in quadrant A5,112,109612,955
Events in quadrant B4,857,204686,040
Events in quadrant C9,187,476487,665
Events in quadrant D7,619,224540,468

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0201182
B0192122
C0321612
D0274362

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0160
C0160
D0160

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01420

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A68914566.617327%
B68913054.426063%
C6891195028.297780%
D689179511.536787%

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 7956 6893 364 364 4.58% 5.28%
B 7956 6893 204 204 2.56% 2.96%
C 7956 6893 1570 1570 19.73% 22.78%
D 7956 6893 812 812 10.21% 11.78%

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 1499023 8781.12 683 666 170.6
A 8 249 186483 1088.98 683 666 170.6
A 4 30 91396 531.72 683 666 170.6
B 8 128 1011829 6869.66 696 671 147.2
B 10 247 124873 843.81 696 671 147.2
B 10 44 113976 769.78 696 671 147.2
C 15 224 5414243 32111.28 608 603 168.6
C 4 5 670947 3976.18 608 603 168.6
C 13 3 318475 1885.47 608 603 168.6
D 2 172 1529892 8047.61 658 630 190.0
D 6 42 1481955 7795.35 658 630 190.0
D 8 176 346928 1822.36 658 630 190.0

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