ASTROSAT CZTI

Data Quality Report

Orbit 20210302_T03_279T01_9000004218_level2

Creation date: 2025-12-20T22:14:00.008391
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/AS1T03_279T01_9000004218cztM0_level2.fits modeM0/AS1T03_279T01_9000004218cztM0_level2_quad_clean.evt
Size (bytes)1,984,158,7201,596,913,920
Size1.8 GB 1.5 GB
Events in quadrant A12,848,7409,602,231
Events in quadrant B12,157,6669,592,819
Events in quadrant C12,100,4928,725,163
Events in quadrant D8,956,2386,448,518

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A041540
B041540
C041540
D041540

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03290
B03290
C03290
D03290

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04401340
B04541840
C05795150
D09964390

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A20425135481.737078%
B20425143442.126795%
C204252154557.566633%
D2042526891133.738225%

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 242231 204253 0 0 0.00% 0.00%
B 242231 204241 0 0 0.00% 0.00%
C 242231 203919 0 0 0.00% 0.00%
D 242231 203224 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 11001 9.75 3346 3153 805.3
A 7 110 10123 8.66 3346 3153 805.3
A 0 30 9689 8.12 3346 3153 805.3
B 2 9 9645 10.46 3224 3082 627.4
B 2 8 8123 8.03 3224 3082 627.4
B 3 17 8057 7.93 3224 3082 627.4
C 12 241 8341 6.6 3205 3016 806.2
C 3 187 8337 6.6 3205 3016 806.2
C 3 126 8251 6.49 3205 3016 806.2
D 15 46 6885 6.71 2563 2336 677.8
D 3 14 6327 5.89 2563 2336 677.8
D 10 189 6310 5.86 2563 2336 677.8

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