ASTROSAT CZTI

Data Quality Report

Orbit 56855

Creation date: 2026-04-01T16:34:42.449155
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_083T03_9000006562_56855cztM0_level2.fits modeM0/AS1A14_083T03_9000006562_56855cztM0_level2_quad_clean.evt
Size (bytes)471,214,080101,148,480
Size449.4 MB 96.5 MB
Events in quadrant A3,650,387676,958
Events in quadrant B3,921,371709,975
Events in quadrant C3,267,627660,160
Events in quadrant D6,081,114547,793

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01351
D01360

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0155956
B0163082
C0143497
D0225005

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A67142123.157581%
B67173595.344648%
C6713640.953374%
D671692513.773079%

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 7872 6717 151 151 1.92% 2.25%
B 7872 6718 234 234 2.97% 3.48%
C 7872 6718 26 26 0.33% 0.39%
D 7872 6718 935 935 11.88% 13.92%

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 62 487885 2626.89 754 735 185.4
A 3 14 152952 820.81 754 735 185.4
A 10 251 30635 161.23 754 735 185.4
B 10 16 549218 3589.18 717 691 152.8
B 5 185 208247 1358.1 717 691 152.8
B 10 32 73511 476.48 717 691 152.8
C 13 3 206681 1026.49 735 726 200.6
C 14 254 45428 222.8 735 726 200.6
C 1 16 39009 190.8 735 726 200.6
D 2 249 2463281 12339.99 707 675 199.6
D 8 240 579582 2900.87 707 675 199.6
D 5 113 98519 490.29 707 675 199.6

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