ASTROSAT CZTI

Data Quality Report

Orbit 55844

Creation date: 2026-01-23T18:13:51.633580
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_55844cztM0_level2.fits modeM0/AS1A14_127T10_9000006542_55844cztM0_level2_quad_clean.evt
Size (bytes)719,369,280104,633,280
Size686.0 MB 99.8 MB
Events in quadrant A5,613,567717,943
Events in quadrant B3,703,174789,460
Events in quadrant C3,806,987706,289
Events in quadrant D12,882,642396,883

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0222170
B0167480
C0176410
D0438080

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01600
B01600
C01600
D01600

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A80201672.082294%
B8021240.299215%
C8021760.947513%
D8021349943.622990%

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 8020 8020 156 156 1.95% 1.95%
B 8021 8021 16 16 0.20% 0.20%
C 8021 8021 72 72 0.90% 0.90%
D 8020 8020 3265 3265 40.71% 40.71%

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 1187046 5862.48 821 799 202.3
A 4 249 450536 2222.62 821 799 202.3
A 0 8 291329 1435.81 821 799 202.3
B 5 185 139062 776.37 819 790 178.1
B 0 197 98103 546.39 819 790 178.1
B 12 0 87438 486.51 819 790 178.1
C 12 252 221457 995.17 804 798 221.7
C 6 223 189769 852.26 804 798 221.7
C 12 250 82509 368.52 804 798 221.7
D 11 129 8825515 51556.65 596 569 171.2
D 8 245 826684 4826.28 596 569 171.2
D 3 12 264431 1541.52 596 569 171.2

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