ASTROSAT CZTI

Data Quality Report

Orbit 53756

Creation date: 2025-09-05T04:32:24.774497
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/AS1A14_022T04_9000006506_53756cztM0_level2.fits modeM0/AS1A14_022T04_9000006506_53756cztM0_level2_quad_clean.evt
Size (bytes)976,187,52076,011,840
Size931.0 MB 72.5 MB
Events in quadrant A17,159,90579,796
Events in quadrant B3,690,289682,948
Events in quadrant C8,230,332495,980
Events in quadrant D6,516,919557,844

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0557771
B0161301
C0293091
D0242551

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01420

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6952622189.485040%
B69531311.884079%
C6953155022.292536%
D69536088.744427%

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 7842 6952 6111 6111 77.93% 87.90%
B 7843 6954 74 74 0.94% 1.06%
C 7843 6953 1443 1443 18.40% 20.75%
D 7843 6954 694 694 8.85% 9.98%

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 3 63 15081583 159331.39 375 366 94.7
A 8 245 264198 2787.36 375 366 94.7
A 3 78 75012 788.63 375 366 94.7
B 4 81 493682 3222.44 710 684 153.0
B 6 255 117484 763.45 710 684 153.0
B 5 185 69820 451.9 710 684 153.0
C 15 224 2864883 16506.07 627 620 173.5
C 1 241 2383654 13732.86 627 620 173.5
C 13 3 125752 721.11 627 620 173.5
D 2 172 2873484 14695.81 684 655 195.5
D 2 120 160498 817.67 684 655 195.5
D 10 172 150676 767.42 684 655 195.5

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