ASTROSAT CZTI

Data Quality Report

Orbit 20220116_A05_208T01_9000004870_level2

Creation date: 2025-12-31T10:07:28.354518
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_208T01_9000004870cztM0_level2.fits modeM0/AS1A05_208T01_9000004870cztM0_level2_quad_clean.evt
Size (bytes)952,099,200805,265,280
Size908.0 MB 768.0 MB
Events in quadrant A5,968,9124,718,242
Events in quadrant B5,520,0204,537,534
Events in quadrant C5,754,9204,477,921
Events in quadrant D4,791,8823,858,559

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020220
B020220
C020220
D020220

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03830
B03830
C03830
D03830

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02055390
B02864880
C02442260
D03511890

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A991237530.759662%
B9912364936.550447%
C9912321932.212403%
D9912381018.172674%

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 143399 99114 0 0 0.00% 0.00%
B 143399 99037 0 0 0.00% 0.00%
C 143399 99090 0 0 0.00% 0.00%
D 143399 99044 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 9 19 4840 8.83 1557 1458 383.1
A 7 110 4840 8.83 1557 1458 383.1
A 0 29 4683 8.42 1557 1458 383.1
B 2 9 4856 12.18 1461 1395 284.1
B 3 80 4236 10.0 1461 1395 284.1
B 2 8 3900 8.82 1461 1395 284.1
C 1 81 4792 8.64 1521 1430 389.2
C 1 80 4641 8.25 1521 1430 389.2
C 3 203 4449 7.76 1521 1430 389.2
D 7 3 3536 6.26 1373 1250 365.3
D 4 160 3524 6.23 1373 1250 365.3
D 10 189 3488 6.13 1373 1250 365.3

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