ASTROSAT CZTI

Data Quality Report

Orbit 58917

Creation date: 2026-08-18T09:27:42.933845
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_004T07_9000006598_58917cztM0_level2.fits modeM0/AS1A14_004T07_9000006598_58917cztM0_level2_quad_clean.evt
Size (bytes)730,002,24086,319,360
Size696.2 MB 82.3 MB
Events in quadrant A10,446,294392,654
Events in quadrant B3,872,250675,755
Events in quadrant C3,392,910613,059
Events in quadrant D8,802,868474,330

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0355291
B0160072
C0148381
D0308471

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6556294344.890177%
B65552764.210526%
C65551552.364607%
D6555146122.288330%

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 7606 6556 2328 2328 30.61% 35.51%
B 7605 6556 144 144 1.89% 2.20%
C 7605 6556 91 91 1.20% 1.39%
D 7605 6555 1194 1194 15.70% 18.22%

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 14 238 8038490 54530.19 597 583 147.4
A 3 14 34812 232.21 597 583 147.4
A 3 254 19709 129.75 597 583 147.4
B 4 236 559732 3660.96 715 688 152.7
B 4 171 231519 1511.62 715 688 152.7
B 5 172 90980 591.29 715 688 152.7
C 12 252 344214 1773.88 704 697 193.7
C 6 223 256324 1320.03 704 697 193.7
C 14 96 24281 121.78 704 697 193.7
D 12 110 5631336 30189.3 647 618 186.5
D 8 160 295274 1579.81 647 618 186.5
D 6 239 120656 643.59 647 618 186.5

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

TCT plots

Parameter TCT0 TCT_healed
Tct