ASTROSAT CZTI

Data Quality Report

Orbit 55838

Creation date: 2026-01-23T06:44:09.867745
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_127T10_9000006542_55838cztM0_level2.fits modeM0/AS1A14_127T10_9000006542_55838cztM0_level2_quad_clean.evt
Size (bytes)592,384,32094,176,000
Size564.9 MB 89.8 MB
Events in quadrant A8,273,182561,591
Events in quadrant B3,029,315697,984
Events in quadrant C2,825,286622,476
Events in quadrant D7,285,572506,387

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0291172
B0139192
C0136162
D0262913

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0160
C0160
D0160

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6639114317.216448%
B6639300.451875%
C6639290.436813%
D6638105015.818017%

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 7859 6640 1213 1213 15.43% 18.27%
B 7859 6640 1 1 0.01% 0.02%
C 7859 6640 14 14 0.18% 0.21%
D 7858 6638 1009 1009 12.84% 15.20%

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 12 115 4712594 28313.93 670 655 166.4
A 3 14 332150 1991.95 670 655 166.4
A 8 192 226510 1357.16 670 655 166.4
B 0 213 198230 1311.4 700 673 150.6
B 7 252 27461 177.82 700 673 150.6
B 12 111 17504 111.73 700 673 150.6
C 12 250 53603 277.4 691 685 190.8
C 13 3 24177 123.15 691 685 190.8
C 12 252 9254 44.92 691 685 190.8
D 11 129 3492557 19318.71 636 607 180.8
D 3 12 882239 4877.5 636 607 180.8
D 15 125 215079 1186.54 636 607 180.8

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