ASTROSAT CZTI

Data Quality Report

Orbit 57627

Creation date: 2026-05-23T15:14:06.060251
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_070T08_9000006576_57627cztM0_level2.fits modeM0/AS1A14_070T08_9000006576_57627cztM0_level2_quad_clean.evt
Size (bytes)479,868,48087,946,560
Size457.6 MB 83.9 MB
Events in quadrant A3,335,636603,790
Events in quadrant B2,836,939654,152
Events in quadrant C3,854,458577,068
Events in quadrant D7,263,613403,313

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0145031
B0127421
C0156981
D0257251

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A60711061.746006%
B60721211.992754%
C60722343.853755%
D6072178229.347826%

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 7136 6072 1 1 0.01% 0.02%
B 7137 6073 12 12 0.17% 0.20%
C 7137 6073 145 145 2.03% 2.39%
D 7137 6073 1189 1189 16.66% 19.58%

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 14 689805 4156.33 670 653 165.8
A 4 249 15821 91.48 670 653 165.8
A 3 245 14875 85.77 670 653 165.8
B 7 252 45670 321.28 662 636 140.2
B 10 247 35223 246.75 662 636 140.2
B 0 63 28928 201.84 662 636 140.2
C 15 224 1136284 6420.42 650 643 176.9
C 14 254 55595 310.67 650 643 176.9
C 12 2 50805 283.59 650 643 176.9
D 8 240 2931358 19175.5 538 513 152.8
D 8 160 1782169 11656.75 538 513 152.8
D 15 142 331477 2165.38 538 513 152.8

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