ASTROSAT CZTI

Data Quality Report

Orbit 55771

Creation date: 2026-01-19T11:33:59.640965
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_099T04_9000006540_55771cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55771cztM0_level2_quad_clean.evt
Size (bytes)581,362,560105,382,080
Size554.4 MB 100.5 MB
Events in quadrant A8,461,148612,712
Events in quadrant B3,723,707751,567
Events in quadrant C3,252,143684,554
Events in quadrant D5,496,825615,919

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0303250
B0163250
C0156990
D0216230

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01520
B01520
C01520
D01520

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7560119515.806878%
B7560180.238095%
C7561140.185161%
D75613855.091919%

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 7560 7560 1187 1187 15.70% 15.70%
B 7560 7560 1 1 0.01% 0.01%
C 7561 7561 12 12 0.16% 0.16%
D 7561 7561 412 412 5.45% 5.45%

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 2764347 14999.59 743 725 184.2
A 7 64 2031438 11021.72 743 725 184.2
A 8 192 281024 1521.33 743 725 184.2
B 7 0 486671 2910.48 775 746 167.0
B 4 206 86457 513.37 775 746 167.0
B 0 199 30218 176.52 775 746 167.0
C 12 2 67984 321.62 764 757 209.0
C 10 22 52246 246.33 764 757 209.0
C 12 250 31572 147.42 764 757 209.0
D 11 129 1615879 7657.61 745 711 210.9
D 7 70 441660 2090.57 745 711 210.9
D 8 240 231300 1093.24 745 711 210.9

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