ASTROSAT CZTI

Data Quality Report

Orbit 55575

Creation date: 2026-01-05T14:06:30.906097
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_021T06_9000006538_55575cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55575cztM0_level2_quad_clean.evt
Size (bytes)519,583,68084,591,360
Size495.5 MB 80.7 MB
Events in quadrant A4,110,421553,706
Events in quadrant B2,580,152606,255
Events in quadrant C7,331,513493,795
Events in quadrant D4,744,989487,390

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0163771
B0123981
C0260521
D0183871

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01220
B01220
C01220
D01220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A60161953.241356%
B6017540.897457%
C601765610.902443%
D60173045.052352%

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 7116 6018 186 186 2.61% 3.09%
B 7117 6019 11 11 0.15% 0.18%
C 7117 6019 863 863 12.13% 14.34%
D 7117 6019 322 322 4.52% 5.35%

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 12 115 1347533 8895.91 611 597 151.4
A 0 8 148384 976.07 611 597 151.4
A 15 32 139708 918.77 611 597 151.4
B 4 169 38030 290.33 607 585 129.0
B 4 67 33490 255.13 607 585 129.0
B 5 172 31681 241.1 607 585 129.0
C 9 38 4899568 31393.93 574 567 156.0
C 15 200 48707 308.49 574 567 156.0
C 12 252 39729 250.96 574 567 156.0
D 11 129 2285289 13706.59 582 554 166.7
D 2 249 51428 305.2 582 554 166.7
D 5 173 47888 283.97 582 554 166.7

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