ASTROSAT CZTI

Data Quality Report

Orbit 55731

Creation date: 2026-01-16T17:49:02.847320
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_55731cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55731cztM0_level2_quad_clean.evt
Size (bytes)3,011,716,800165,404,160
Size2.8 GB 157.7 MB
Events in quadrant A17,012,1051,342,350
Events in quadrant B32,139,737937,371
Events in quadrant C29,107,293750,227
Events in quadrant D31,839,437733,102

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0627743
B01079463
C0988734
D01069003

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0160
C0160
D0160

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03660
B03660
C03660
D03660

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A18037323717.946443%
B18037905950.224538%
C18036998855.378133%
D18037966853.600931%

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 19627 18039 2424 2424 12.35% 13.44%
B 19627 18039 7936 7936 40.43% 43.99%
C 19626 18034 7220 7220 36.79% 40.04%
D 19627 18038 8823 8823 44.95% 48.91%

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 8134155 19680.02 1686 1645 413.2
A 0 8 728820 1759.71 1686 1645 413.2
A 8 192 479064 1155.32 1686 1645 413.2
B 4 206 25830806 77652.21 1550 1492 332.6
B 0 199 81815 241.48 1550 1492 332.6
B 12 111 40031 115.86 1550 1492 332.6
C 15 199 13861451 41311.75 1230 1221 335.5
C 9 38 8853942 26386.38 1230 1221 335.5
C 14 96 550010 1635.72 1230 1221 335.5
D 11 129 25689074 66647.03 1374 1312 385.4
D 8 245 270248 697.75 1374 1312 385.4
D 6 239 223760 577.14 1374 1312 385.4

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