ASTROSAT CZTI

Data Quality Report

Orbit 54891

Creation date: 2025-11-20T12:52:59.946338
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_039T06_9000006526_54891cztM0_level2.fits modeM0/AS1A14_039T06_9000006526_54891cztM0_level2_quad_clean.evt
Size (bytes)392,391,36099,132,480
Size374.2 MB 94.5 MB
Events in quadrant A3,129,800646,075
Events in quadrant B2,963,857694,926
Events in quadrant C3,665,454610,780
Events in quadrant D4,230,449570,876

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D0100

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0143874
B0141542
C0159387
D0175096

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01400
B01400
C01400
D01402

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6879711.032127%
B6880741.075581%
C68781361.977319%
D68781922.791509%

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 7805 6881 13 13 0.17% 0.19%
B 7805 6881 3 3 0.04% 0.04%
C 7805 6881 96 96 1.23% 1.40%
D 7805 6881 195 195 2.50% 2.83%

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 14 200938 1113.46 726 709 179.8
A 0 8 59384 326.29 726 709 179.8
A 13 254 20899 112.28 726 709 179.8
B 5 236 32972 208.16 715 688 155.1
B 5 185 28539 179.57 715 688 155.1
B 10 247 26155 164.2 715 688 155.1
C 15 199 191691 1001.69 699 695 190.7
C 4 5 170200 888.98 699 695 190.7
C 6 223 150693 786.67 699 695 190.7
D 8 160 470805 2348.77 696 666 200.2
D 10 181 345151 1721.02 696 666 200.2
D 15 94 126316 627.74 696 666 200.2

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