ASTROSAT CZTI

Data Quality Report

Orbit 20200609_A09_047T01_9000003714_level2

Creation date: 2025-12-12T17:20:59.814164
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_047T01_9000003714cztM0_level2.fits modeM0/AS1A09_047T01_9000003714cztM0_level2_quad_clean.evt
Size (bytes)1,496,563,2001,241,248,320
Size1.4 GB 1.2 GB
Events in quadrant A9,536,0247,408,071
Events in quadrant B9,035,2687,368,373
Events in quadrant C9,168,9146,990,831
Events in quadrant D7,379,0365,624,057

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A030420
B030420
C030420
D030420

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02370
B02370
C02370
D02370

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03335200
B03183830
C03188330
D05460190

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A14879216831.131109%
B14879218771.261493%
C14879225041.682886%
D1487922110014.180870%

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 172941 148764 0 0 0.00% 0.00%
B 172942 148768 0 0 0.00% 0.00%
C 172941 148768 0 0 0.00% 0.00%
D 172941 144969 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 9127 11.33 2487 2343 598.5
A 7 110 7549 8.7 2487 2343 598.5
A 9 19 7246 8.19 2487 2343 598.5
B 2 9 7312 10.93 2388 2288 459.5
B 5 128 6022 8.13 2388 2288 459.5
B 2 8 6014 8.11 2388 2288 459.5
C 12 241 6203 6.52 2424 2277 601.7
C 9 209 6187 6.5 2424 2277 601.7
C 3 126 6153 6.44 2424 2277 601.7
D 6 231 5231 5.94 2107 1929 556.3
D 10 189 5193 5.87 2107 1929 556.3
D 3 14 5158 5.8 2107 1929 556.3

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