ASTROSAT CZTI

Data Quality Report

Orbit 51498

Creation date: 2025-04-06T03:14:35.944269
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/AS1A13_090T01_9000006458_51498cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51498cztM0_level2_quad_clean.evt
Size (bytes)838,310,40096,652,800
Size799.5 MB 92.2 MB
Events in quadrant A6,668,215661,294
Events in quadrant B9,280,280594,992
Events in quadrant C4,833,857673,492
Events in quadrant D9,667,762473,254

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0248362
B0327702
C0195162
D0340222

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0130
C0130
D0130

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01560
B01560
C01560
D01560

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A751675610.058542%
B7516194825.918042%
C75162893.845130%
D7516220829.377328%

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 8850 7518 512 512 5.79% 6.81%
B 8850 7518 1446 1446 16.34% 19.23%
C 8850 7517 194 194 2.19% 2.58%
D 8849 7516 2126 2126 24.03% 28.29%

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 12 3 924327 4548.89 826 805 203.0
A 4 175 499365 2455.7 826 805 203.0
A 8 43 469420 2308.2 826 805 203.0
B 4 81 2946284 18225.12 743 714 161.6
B 10 254 1794036 11095.82 743 714 161.6
B 2 208 985903 6095.66 743 714 161.6
C 12 252 435446 1941.28 820 815 223.9
C 3 233 258516 1151.02 820 815 223.9
C 12 247 191569 852.0 820 815 223.9
D 8 176 5437787 27402.28 716 693 198.4
D 11 176 867376 4367.98 716 693 198.4
D 2 216 141040 707.33 716 693 198.4

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