ASTROSAT CZTI

Data Quality Report

Orbit 56687

Creation date: 2026-03-21T09:56:54.455462
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_083T06_9000006558_56687cztM0_level2.fits modeM0/AS1A14_083T06_9000006558_56687cztM0_level2_quad_clean.evt
Size (bytes)531,806,400111,225,600
Size507.2 MB 106.1 MB
Events in quadrant A4,960,876732,717
Events in quadrant B3,710,855799,307
Events in quadrant C5,098,146650,936
Events in quadrant D5,306,545639,138

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01580
B01580
C01580
D01580

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0205350
B0167560
C0210270
D0216210

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A78422643.366488%
B7842670.854374%
C78436388.134642%
D78434195.342343%

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 7842 7842 226 226 2.88% 2.88%
B 7842 7842 10 10 0.13% 0.13%
C 7843 7843 390 390 4.97% 4.97%
D 7843 7843 390 390 4.97% 4.97%

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 924496 4536.91 826 804 203.6
A 8 26 517091 2535.86 826 804 203.6
A 3 62 172431 842.98 826 804 203.6
B 4 21 192185 1085.13 830 800 176.4
B 8 128 60675 339.48 830 800 176.4
B 0 245 52423 292.7 830 800 176.4
C 15 215 1042211 4919.43 782 777 211.7
C 13 3 595456 2809.09 782 777 211.7
C 15 230 113627 533.07 782 777 211.7
D 2 249 1203645 5435.05 789 754 221.3
D 8 240 390352 1760.33 789 754 221.3
D 0 160 140742 632.51 789 754 221.3

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