ASTROSAT CZTI

Data Quality Report

Orbit 57576

Creation date: 2026-05-20T06:01:54.094660
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_070T08_9000006576_57576cztM0_level2.fits modeM0/AS1A14_070T08_9000006576_57576cztM0_level2_quad_clean.evt
Size (bytes)1,191,435,840221,135,040
Size1.1 GB 210.9 MB
Events in quadrant A6,704,9351,502,952
Events in quadrant B8,254,2941,586,188
Events in quadrant C15,072,3121,244,265
Events in quadrant D12,826,9721,252,775

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0326432
B0362572
C0559702
D0493652

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B070
C070
D070

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03260
B03260
C03260
D03260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A160781310.814778%
B160793222.002612%
C16079230314.323030%
D1607913558.427141%

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 16648 16081 2 2 0.01% 0.01%
B 16649 16082 81 81 0.49% 0.50%
C 16649 16081 1587 1587 9.53% 9.87%
D 16649 16081 1043 1043 6.26% 6.49%

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 3 128 28895 65.03 1712 1666 418.7
A 10 251 24347 54.17 1712 1666 418.7
A 3 137 21323 46.94 1712 1666 418.7
B 5 185 667095 1872.5 1680 1615 355.4
B 2 249 250262 699.63 1680 1615 355.4
B 10 247 151407 421.48 1680 1615 355.4
C 14 245 3316254 7923.8 1549 1532 418.3
C 12 254 3111887 7435.27 1549 1532 418.3
C 15 224 1711462 4087.57 1549 1532 418.3
D 2 249 3520604 7842.5 1596 1522 448.7
D 15 142 1188944 2646.25 1596 1522 448.7
D 3 12 454291 1009.02 1596 1522 448.7

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