ASTROSAT CZTI

Data Quality Report

Orbit 56818

Creation date: 2026-03-30T06:01:04.974369
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_083T03_9000006562_56818cztM0_level2.fits modeM0/AS1A14_083T03_9000006562_56818cztM0_level2_quad_clean.evt
Size (bytes)701,942,400105,238,080
Size669.4 MB 100.4 MB
Events in quadrant A5,967,651733,618
Events in quadrant B11,362,581540,523
Events in quadrant C4,248,302687,167
Events in quadrant D3,784,715668,822

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010
B010
C010
D010

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01620
B01620
C01620
D01620

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0233281
B0393198
C0188701
D0175321

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A79982362.950738%
B7997296237.038890%
C79982633.288322%
D7998600.750188%

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 8013 7999 37 37 0.46% 0.46%
B 8012 7998 1991 1991 24.85% 24.89%
C 8013 7999 208 208 2.60% 2.60%
D 8013 7999 36 36 0.45% 0.45%

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 3 14 1908829 8969.72 855 834 212.7
A 4 249 464931 2181.78 855 834 212.7
A 10 251 237780 1113.91 855 834 212.7
B 4 206 6434314 40846.97 720 695 157.5
B 5 185 1182526 7503.43 720 695 157.5
B 2 249 434449 2753.9 720 695 157.5
C 2 12 493735 2216.06 812 804 222.4
C 15 230 239205 1071.78 812 804 222.4
C 9 38 122874 548.79 812 804 222.4
D 2 31 181506 769.9 830 790 234.7
D 2 249 167964 712.21 830 790 234.7
D 5 173 80125 337.99 830 790 234.7

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