ASTROSAT CZTI

Data Quality Report

Orbit 20170417_A03_025T07_9000001182_level2

Creation date: 2025-11-11T21:42:21.802801
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/AS1A03_025T07_9000001182cztM0_level2.fits modeM0/AS1A03_025T07_9000001182cztM0_level2_quad_clean.evt
Size (bytes)362,226,240322,922,880
Size345.4 MB 308.0 MB
Events in quadrant A2,228,7141,898,066
Events in quadrant B2,154,4001,906,692
Events in quadrant C2,163,7401,784,412
Events in quadrant D1,866,7461,633,518

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0780
B0780
C0780
D0780

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07620
B07640
C07580
D07580

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0771470
B0783510
C0763290
D0865120

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A372175081.364968%
B372145191.394636%
C372103080.827734%
D3721710162.729935%

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 45298 37290 0 0 0.00% 0.00%
B 45298 37291 0 0 0.00% 0.00%
C 45298 37291 0 0 0.00% 0.00%
D 45298 37247 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 2105 10.81 580 545 144.3
A 7 110 1804 8.72 580 545 144.3
A 9 19 1690 7.93 580 545 144.3
B 2 9 1877 11.78 569 545 113.1
B 5 128 1445 7.96 569 545 113.1
B 12 226 1441 7.92 569 545 113.1
C 1 80 1607 7.17 571 533 149.9
C 1 81 1498 6.44 571 533 149.9
C 12 241 1469 6.24 571 533 149.9
D 7 5 1378 6.27 532 485 142.5
D 6 231 1374 6.24 532 485 142.5
D 10 189 1322 5.87 532 485 142.5

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