ASTROSAT CZTI

Data Quality Report

Orbit 55775

Creation date: 2026-01-19T17:10:54.950862
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_099T04_9000006540_55775cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55775cztM0_level2_quad_clean.evt
Size (bytes)990,336,96071,579,520
Size944.5 MB 68.3 MB
Events in quadrant A12,306,957386,347
Events in quadrant B6,864,224665,355
Events in quadrant C3,706,994587,189
Events in quadrant D13,273,35070,452

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0410887
B0250611
C0159691
D0439381

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6563323549.291483%
B65642844.326630%
C65642553.884826%
D6564590189.899452%

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 7388 6563 3140 3140 42.50% 47.84%
B 7389 6565 105 105 1.42% 1.60%
C 7389 6565 193 193 2.61% 2.94%
D 7388 6564 4361 4361 59.03% 66.44%

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 8426167 60495.85 554 542 139.3
A 15 32 785158 5633.53 554 542 139.3
A 0 8 347750 2492.95 554 542 139.3
B 5 172 4045458 28033.09 671 647 144.3
B 7 0 79327 545.3 671 647 144.3
B 7 252 38221 260.41 671 647 144.3
C 13 3 894321 4856.43 666 657 184.0
C 12 2 102573 553.84 666 657 184.0
C 14 96 44432 237.89 666 657 184.0
D 11 129 10086788 137108.83 249 237 73.6
D 7 70 1812075 24628.74 249 237 73.6
D 8 245 145335 1972.35 249 237 73.6

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