ASTROSAT CZTI

Data Quality Report

Orbit 20190526_A05_155T04_9000002956_level2

Creation date: 2025-12-01T00:08:53.123692
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/AS1A05_155T04_9000002956cztM0_level2.fits modeM0/AS1A05_155T04_9000002956cztM0_level2_quad_clean.evt
Size (bytes)155,856,960137,600,640
Size148.6 MB 131.2 MB
Events in quadrant A940,400804,695
Events in quadrant B912,984810,157
Events in quadrant C902,492715,844
Events in quadrant D799,090671,562

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03440
B03440
C03440
D03440

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0356040
B0349670
C0464230
D0410920

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A168874782.830580%
B168874962.937171%
C1688714538.604252%
D1688710396.152662%

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 17682 16886 0 0 0.00% 0.00%
B 17682 16884 0 0 0.00% 0.00%
C 17682 16882 0 0 0.00% 0.00%
D 17682 16837 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 29 885 10.45 244 228 62.8
A 7 110 760 8.47 244 228 62.8
A 9 19 733 8.04 244 228 62.8
B 2 9 755 10.28 240 227 51.3
B 3 17 620 7.65 240 227 51.3
B 2 8 614 7.54 240 227 51.3
C 1 80 732 7.99 238 221 64.0
C 1 81 700 7.49 238 221 64.0
C 9 233 649 6.69 238 221 64.0
D 4 246 611 6.62 227 206 61.2
D 10 189 575 6.03 227 206 61.2
D 1 3 573 6.0 227 206 61.2

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