ASTROSAT CZTI

Data Quality Report

Orbit 56250

Creation date: 2026-02-20T00:59:37.437160
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_049T01_9000006552_56250cztM0_level2.fits modeM0/AS1A14_049T01_9000006552_56250cztM0_level2_quad_clean.evt
Size (bytes)808,770,24084,703,680
Size771.3 MB 80.8 MB
Events in quadrant A12,382,708322,799
Events in quadrant B4,178,972680,370
Events in quadrant C5,117,439582,432
Events in quadrant D7,724,414497,466

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0417601
B0173550
C0201111
D0276810

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6908363852.663578%
B69102333.371925%
C69095327.700101%
D6909110816.037053%

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 6908 6908 3339 3339 48.34% 48.34%
B 6910 6910 151 151 2.19% 2.19%
C 6909 6909 484 484 7.01% 7.01%
D 6909 6909 1119 1119 16.20% 16.20%

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 15 32 5533748 40238.46 546 533 137.5
A 8 176 3645041 26503.47 546 533 137.5
A 7 64 392134 2847.79 546 533 137.5
B 4 171 564270 3688.82 718 693 152.8
B 8 128 212397 1385.68 718 693 152.8
B 1 255 121479 790.59 718 693 152.8
C 12 254 1478324 7869.01 683 681 187.8
C 5 250 359519 1910.95 683 681 187.8
C 13 3 260533 1383.81 683 681 187.8
D 8 129 4202452 22440.97 656 626 187.2
D 2 249 470507 2509.53 656 626 187.2
D 3 12 123771 657.69 656 626 187.2

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