ASTROSAT CZTI

Data Quality Report

Orbit 57901

Creation date: 2026-06-11T01:07:10.164845
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_125T11_9000006582_57901cztM0_level2.fits modeM0/AS1A14_125T11_9000006582_57901cztM0_level2_quad_clean.evt
Size (bytes)418,242,24092,407,680
Size398.9 MB 88.1 MB
Events in quadrant A2,677,254622,907
Events in quadrant B3,008,556659,209
Events in quadrant C3,991,392570,043
Events in quadrant D5,323,654514,254

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0125601
B0133631
C0162741
D0202731

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A618390.145560%
B6183560.905709%
C61842133.444373%
D61845108.247089%

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 7368 6184 1 1 0.01% 0.02%
B 7368 6184 34 34 0.46% 0.55%
C 7369 6185 172 172 2.33% 2.78%
D 7369 6185 615 615 8.35% 9.94%

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 56463 336.15 671 654 166.0
A 3 245 14770 85.02 671 654 166.0
A 13 254 9431 52.87 671 654 166.0
B 10 247 85763 607.12 659 635 140.2
B 5 185 56423 397.87 659 635 140.2
B 0 245 52451 369.54 659 635 140.2
C 15 224 1303495 7557.16 630 626 172.4
C 12 252 86530 498.28 630 626 172.4
C 14 254 60452 347.01 630 626 172.4
D 8 160 2249954 12650.51 621 591 177.8
D 3 224 208532 1169.47 621 591 177.8
D 8 240 152173 852.5 621 591 177.8

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