ASTROSAT CZTI

Data Quality Report

Orbit 55659

Creation date: 2026-01-12T10:04:31.595481
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_021T06_9000006538_55659cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55659cztM0_level2_quad_clean.evt
Size (bytes)457,447,680105,572,160
Size436.3 MB 100.7 MB
Events in quadrant A4,710,114699,111
Events in quadrant B3,100,221741,306
Events in quadrant C3,402,182652,038
Events in quadrant D5,175,383615,638

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0140
C0140
D0140

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0191972
B0147692
C0154892
D0203922

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01420

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A70162733.891106%
B7016250.356328%
C7016811.154504%
D70164416.285633%

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 7851 7017 206 206 2.62% 2.94%
B 7851 7017 4 4 0.05% 0.06%
C 7851 7017 47 47 0.60% 0.67%
D 7851 7017 511 511 6.51% 7.28%

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 0 8 525247 2821.78 733 713 185.9
A 8 6 405658 2178.44 733 713 185.9
A 3 14 392627 2108.33 733 713 185.9
B 5 172 121036 761.22 730 705 158.1
B 0 171 23154 142.01 730 705 158.1
B 5 248 21226 129.82 730 705 158.1
C 12 250 159880 805.68 718 711 197.6
C 13 3 149730 754.3 718 711 197.6
C 15 148 112509 565.9 718 711 197.6
D 8 245 1574915 7721.89 713 680 203.9
D 11 129 284650 1392.92 713 680 203.9
D 7 70 149524 730.11 713 680 203.9

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