ASTROSAT CZTI

Data Quality Report

Orbit 20210826_A10_094T34_9000004662_level2

Creation date: 2025-12-28T10:00:46.854007
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/AS1A10_094T34_9000004662cztM0_level2.fits modeM0/AS1A10_094T34_9000004662cztM0_level2_quad_clean.evt
Size (bytes)175,832,64079,807,680
Size167.7 MB 76.1 MB
Events in quadrant A1,135,682345,406
Events in quadrant B1,039,392336,156
Events in quadrant C1,065,660325,748
Events in quadrant D957,778281,274

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0344620
B0509080
C0470770
D0458390

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0360
B0360
C0360
D0360

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03320
B03320
C03320
D03320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A163331270.777567%
B163333852.357191%
C1633310526.440948%
D163339185.620523%

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 19897 16329 0 0 0.00% 0.00%
B 19898 16327 0 0 0.00% 0.00%
C 19897 16327 0 0 0.00% 0.00%
D 19898 16304 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 1073 10.84 297 282 72.9
A 0 30 878 8.17 297 282 72.9
A 7 110 848 7.76 297 282 72.9
B 2 9 842 10.27 276 266 56.1
B 3 80 712 7.95 276 266 56.1
B 5 128 697 7.68 276 266 56.1
C 3 202 871 8.4 281 267 71.9
C 1 81 867 8.34 281 267 71.9
C 1 80 832 7.85 281 267 71.9
D 10 189 709 6.25 274 252 73.1
D 7 3 701 6.14 274 252 73.1
D 15 47 689 5.98 274 252 73.1

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