ASTROSAT CZTI

Data Quality Report

Orbit 57655

Creation date: 2026-05-25T12:11:50.553998
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_125T09_9000006578_57655cztM0_level2.fits modeM0/AS1A14_125T09_9000006578_57655cztM0_level2_quad_clean.evt
Size (bytes)390,522,24098,570,880
Size372.4 MB 94.0 MB
Events in quadrant A2,986,775652,743
Events in quadrant B2,993,782705,528
Events in quadrant C3,713,426622,477
Events in quadrant D4,274,559567,425

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0133071
B0131481
C0152991
D0169881

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6263600.958007%
B6263731.165576%
C62631221.947948%
D62622814.487384%

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 7488 6264 20 20 0.27% 0.32%
B 7488 6264 5 5 0.07% 0.08%
C 7488 6264 76 76 1.01% 1.21%
D 7487 6263 267 267 3.57% 4.26%

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 7 223 239744 1369.84 705 685 174.5
A 4 3 19048 105.22 705 685 174.5
A 3 137 8184 42.97 705 685 174.5
B 5 185 99500 676.83 700 675 146.0
B 0 213 44927 303.07 700 675 146.0
B 5 172 42341 285.36 700 675 146.0
C 15 224 767477 4089.91 690 685 187.5
C 14 254 114339 606.2 690 685 187.5
C 6 223 73337 387.51 690 685 187.5
D 8 240 769832 4003.36 677 644 192.1
D 3 12 287697 1494.01 677 644 192.1
D 8 160 128512 665.51 677 644 192.1

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