ASTROSAT CZTI

Data Quality Report

Orbit 52864

Creation date: 2025-07-16T11:10:21.229020
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/AS1C09_011T08_9000006482_52864cztM0_level2.fits modeM0/AS1C09_011T08_9000006482_52864cztM0_level2_quad_clean.evt
Size (bytes)914,051,52081,768,960
Size871.7 MB 78.0 MB
Events in quadrant A5,776,692646,225
Events in quadrant B11,367,997418,047
Events in quadrant C5,381,985586,702
Events in quadrant D10,770,805339,930

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0222281
B0385851
C0210951
D0368331

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020
B020
C020
D020

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01420

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A69564556.541116%
B6957309044.415696%
C69576659.558718%
D6956335348.202990%

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 7131 6957 370 370 5.19% 5.32%
B 7132 6958 2484 2484 34.83% 35.70%
C 7132 6959 493 493 6.91% 7.08%
D 7131 6956 2564 2564 35.96% 36.86%

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 9 191 1646871 9196.57 714 699 179.0
A 3 78 522831 2916.96 714 699 179.0
A 3 14 145968 811.57 714 699 179.0
B 8 3 7844022 63465.73 587 568 123.6
B 0 213 839642 6789.41 587 568 123.6
B 5 185 56449 452.16 587 568 123.6
C 15 224 1852539 9891.39 682 672 187.2
C 13 3 239556 1275.95 682 672 187.2
C 4 5 230768 1229.01 682 672 187.2
D 15 125 6579522 45112.95 497 473 145.8
D 8 176 828519 5677.96 497 473 145.8
D 2 172 524203 3591.25 497 473 145.8

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