ASTROSAT CZTI

Data Quality Report

Orbit 20210119_A10_123T06_9000004122_level2

Creation date: 2025-12-19T21:37:41.302233
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_123T06_9000004122cztM0_level2.fits modeM0/AS1A10_123T06_9000004122cztM0_level2_quad_clean.evt
Size (bytes)365,578,560361,451,520
Size348.6 MB 344.7 MB
Events in quadrant A2,268,6822,210,155
Events in quadrant B2,159,6022,193,996
Events in quadrant C2,157,0542,036,937
Events in quadrant D1,923,4661,944,253

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0450
B0450
C0450
D0450

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0796910
B0796320
C01033270
D01027240

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07600
B07600
C07600
D07600

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A372969992.678571%
B372969222.472115%
C3729624326.520807%
D3729616764.493779%

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 41781 37290 0 0 0.00% 0.00%
B 41781 37288 0 0 0.00% 0.00%
C 41780 37287 0 0 0.00% 0.00%
D 41781 37277 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 2200 11.16 592 558 147.2
A 0 30 1758 8.15 592 558 147.2
A 7 110 1730 7.96 592 558 147.2
B 2 9 1764 10.73 571 545 113.6
B 3 17 1466 8.11 571 545 113.6
B 2 8 1458 8.04 571 545 113.6
C 3 126 1514 6.88 569 534 142.4
C 12 241 1494 6.74 569 534 142.4
C 7 111 1448 6.42 569 534 142.4
D 4 246 1496 6.8 549 498 146.8
D 3 14 1423 6.3 549 498 146.8
D 15 46 1383 6.03 549 498 146.8

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