ASTROSAT CZTI

Data Quality Report

Orbit 20180721_T02_070T01_9000002244_level2

Creation date: 2025-11-23T15:50:14.711907
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/AS1T02_070T01_9000002244cztM0_level2.fits modeM0/AS1T02_070T01_9000002244cztM0_level2_quad_clean.evt
Size (bytes)92,183,04073,644,480
Size87.9 MB 70.2 MB
Events in quadrant A556,246406,475
Events in quadrant B528,920403,645
Events in quadrant C547,318381,475
Events in quadrant D480,136358,513

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0202840
B0220050
C0234360
D0206670

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02020
B02020
C02020
D02020

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0160
C0160
D0160

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A97911011.031560%
B97913053.115106%
C9791960.980492%
D97911121.143908%

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 11505 9798 0 0 0.00% 0.00%
B 11505 9787 0 0 0.00% 0.00%
C 11505 9798 0 0 0.00% 0.00%
D 11505 9798 0 0 0.00% 0.00%

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 29 522 10.23 144 135 37.8
A 9 19 445 8.19 144 135 37.8
A 7 110 443 8.14 144 135 37.8
B 2 9 450 10.65 139 132 29.9
B 14 254 377 8.2 139 132 29.9
B 5 232 372 8.04 139 132 29.9
C 12 241 391 6.52 144 134 39.4
C 3 126 390 6.49 144 134 39.4
C 2 191 379 6.22 144 134 39.4
D 3 14 382 6.77 136 124 38.1
D 1 19 364 6.3 136 124 38.1
D 10 189 347 5.85 136 124 38.1

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