ASTROSAT CZTI

Data Quality Report

Orbit 56937

Creation date: 2026-04-07T06:53:39.717695
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_083T14_9000006564_56937cztM0_level2.fits modeM0/AS1A14_083T14_9000006564_56937cztM0_level2_quad_clean.evt
Size (bytes)2,295,236,160200,750,400
Size2.1 GB 191.5 MB
Events in quadrant A9,965,8391,620,860
Events in quadrant B19,281,8261,444,191
Events in quadrant C10,173,9651,552,710
Events in quadrant D44,134,553204,568

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03720
B03720
C03720
D03720

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0140
D0140

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0425723
B0701163
C0440903
D01435763

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A181974592.522394%
B18198383621.079239%
C181985703.132212%
D181981624689.273547%

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 19667 18200 362 362 1.84% 1.99%
B 19668 18200 2956 2956 15.03% 16.24%
C 19668 18199 506 506 2.57% 2.78%
D 19667 18197 16217 16217 82.46% 89.12%

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 7 64 1091012 2343.85 1878 1828 464.7
A 8 206 676096 1450.98 1878 1828 464.7
A 13 153 244299 521.78 1878 1828 464.7
B 5 185 7127901 19565.3 1701 1636 364.2
B 5 172 3383716 9285.57 1701 1636 364.2
B 10 16 1445918 3965.31 1701 1636 364.2
C 13 3 2369543 4823.45 1805 1788 490.9
C 14 254 204298 412.54 1805 1788 490.9
C 12 249 73098 145.27 1805 1788 490.9
D 12 33 36625823 119447.0 1070 1020 306.6
D 2 120 1048840 3417.33 1070 1020 306.6
D 11 129 487167 1585.5 1070 1020 306.6

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