ASTROSAT CZTI

Data Quality Report

Orbit 20200703_A09_147T01_9000003754_level2

Creation date: 2025-12-13T06:26:22.817924
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/AS1A09_147T01_9000003754cztM0_level2.fits modeM0/AS1A09_147T01_9000003754cztM0_level2_quad_clean.evt
Size (bytes)1,558,022,4001,391,342,400
Size1.5 GB 1.3 GB
Events in quadrant A9,725,2308,286,224
Events in quadrant B9,400,0028,402,407
Events in quadrant C9,477,4887,909,335
Events in quadrant D7,926,1486,886,774

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02480
B02480
C02480
D02480

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A031660
B031660
C031660
D031660

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03399670
B03280090
C03259740
D04878200

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A15544826971.734985%
B15544823001.479594%
C15544827451.765864%
D155448144579.300216%

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 179812 155422 0 0 0.00% 0.00%
B 179812 155424 0 0 0.00% 0.00%
C 179812 155419 0 0 0.00% 0.00%
D 179812 154948 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 8140 9.41 2536 2394 610.5
A 7 110 7812 8.88 2536 2394 610.5
A 9 19 7129 7.76 2536 2394 610.5
B 2 9 7486 10.73 2487 2384 475.3
B 2 8 6352 8.35 2487 2384 475.3
B 3 17 6148 7.92 2487 2384 475.3
C 12 241 6566 6.66 2507 2352 632.7
C 3 126 6421 6.43 2507 2352 632.7
C 9 209 6304 6.25 2507 2352 632.7
D 3 14 5779 6.21 2264 2062 598.5
D 10 189 5602 5.91 2264 2062 598.5
D 6 231 5532 5.8 2264 2062 598.5

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