ASTROSAT CZTI

Data Quality Report

Orbit 55581

Creation date: 2026-01-06T00:30:38.725071
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_021T06_9000006538_55581cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55581cztM0_level2_quad_clean.evt
Size (bytes)495,616,320104,929,920
Size472.7 MB 100.1 MB
Events in quadrant A4,967,681674,258
Events in quadrant B3,329,270744,430
Events in quadrant C4,403,305632,987
Events in quadrant D5,065,357605,347

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0201530
B0155610
C0190620
D0204855

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01500
B01500
C01500
D01500

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A74733184.255319%
B7473200.267630%
C74742583.451967%
D74722843.800857%

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 7473 7473 264 264 3.53% 3.53%
B 7473 7473 8 8 0.11% 0.11%
C 7474 7474 245 245 3.28% 3.28%
D 7474 7473 252 252 3.37% 3.37%

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 830346 4396.24 760 740 188.7
A 0 8 550131 2911.32 760 740 188.7
A 12 115 473073 2502.98 760 740 188.7
B 4 169 160757 982.8 761 730 162.8
B 0 199 44037 265.97 761 730 162.8
B 10 247 33371 200.46 761 730 162.8
C 13 3 1138520 5567.79 742 731 204.4
C 12 2 103711 503.93 742 731 204.4
C 6 223 87541 424.8 742 731 204.4
D 11 129 826985 3940.55 740 705 209.7
D 15 125 766448 3651.85 740 705 209.7
D 11 224 191535 910.07 740 705 209.7

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