ASTROSAT CZTI

Data Quality Report

Orbit 58991

Creation date: 2026-08-23T09:12:08.771004
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_58991cztM0_level2.fits modeM0/AS1A14_004T07_9000006598_58991cztM0_level2_quad_clean.evt
Size (bytes)935,277,12076,613,760
Size891.9 MB 73.1 MB
Events in quadrant A3,352,955671,696
Events in quadrant B3,393,602724,837
Events in quadrant C15,974,53251,871
Events in quadrant D11,382,674406,142

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0145232
B0146512
C0517032
D0384515

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0200
B0210
C0210
D0210

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A66761041.557819%
B66761271.902337%
C6676623593.394248%
D6675253237.932584%

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 7846 6677 50 50 0.64% 0.75%
B 7846 6677 58 58 0.74% 0.87%
C 7845 6675 6155 6155 78.46% 92.21%
D 7845 6675 2349 2349 29.94% 35.19%

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 185177 1001.48 751 733 184.2
A 15 233 75558 406.28 751 733 184.2
A 3 14 64202 344.62 751 733 184.2
B 10 247 155153 970.9 747 720 159.1
B 4 236 125123 782.1 747 720 159.1
B 0 157 33213 204.28 747 720 159.1
C 15 219 14932961 243497.13 219 217 61.3
C 9 38 112833 1836.35 219 217 61.3
C 13 3 29956 484.93 219 217 61.3
D 12 110 8274001 45500.83 636 609 181.8
D 1 50 145008 794.15 636 609 181.8
D 13 138 131990 722.55 636 609 181.8

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