ASTROSAT CZTI

Data Quality Report

Orbit 52836

Creation date: 2025-07-16T09:31:36.933050
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_011T07_9000006480_52836cztM0_level2.fits modeM0/AS1C09_011T07_9000006480_52836cztM0_level2_quad_clean.evt
Size (bytes)1,051,957,44098,484,480
Size1003.2 MB 93.9 MB
Events in quadrant A13,017,973508,778
Events in quadrant B9,509,326726,008
Events in quadrant C7,852,777600,465
Events in quadrant D7,946,127591,913

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01600
B01600
C01600
D01600

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0442540
B0337960
C0291211
D0292260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7969297637.344711%
B7969113214.205045%
C7968142117.833835%
D7969124815.660685%

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 7969 7969 2566 2566 32.20% 32.20%
B 7969 7969 707 707 8.87% 8.87%
C 7968 7968 1111 1111 13.94% 13.94%
D 7969 7969 1020 1020 12.80% 12.80%

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 5396941 30609.74 701 684 176.3
A 3 62 2364192 13406.77 701 684 176.3
A 4 238 693830 3931.8 701 684 176.3
B 8 3 5233390 30615.16 802 773 170.9
B 10 254 404434 2361.75 802 773 170.9
B 6 203 157238 915.45 802 773 170.9
C 15 224 2205983 10353.14 760 750 213.0
C 2 12 1432906 6723.7 760 750 213.0
C 4 5 543035 2545.92 760 750 213.0
D 12 17 2804414 12742.3 761 724 220.0
D 3 224 682178 3097.09 761 724 220.0
D 2 249 414746 1881.66 761 724 220.0

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