ASTROSAT CZTI

Data Quality Report

Orbit 20171117_A04_112T01_9000001698_level2

Creation date: 2025-11-18T10:22:51.503400
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/AS1A04_112T01_9000001698cztM0_level2.fits modeM0/AS1A04_112T01_9000001698cztM0_level2_quad_clean.evt
Size (bytes)418,371,840485,896,320
Size399.0 MB 463.4 MB
Events in quadrant A2,398,7802,907,184
Events in quadrant B2,387,1922,969,033
Events in quadrant C2,511,6202,933,086
Events in quadrant D2,179,4322,717,075

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A09440
B09440
C09440
D09440

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01526150
B01314920
C0947920
D01091090

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0640
B0640
C0640
D0640

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A46475516111.104895%
B4647540268.662722%
C464754120.886498%
D4647511952.571275%

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 52720 46164 0 0 0.00% 0.00%
B 52720 46461 0 0 0.00% 0.00%
C 52720 46475 0 0 0.00% 0.00%
D 52720 46473 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 2330 11.02 625 587 158.2
A 7 110 2002 8.94 625 587 158.2
A 9 19 1822 7.81 625 587 158.2
B 2 9 2076 11.83 630 600 124.7
B 3 17 1623 8.2 630 600 124.7
B 14 254 1553 7.64 630 600 124.7
C 3 158 1706 6.24 664 617 174.4
C 2 191 1686 6.13 664 617 174.4
C 3 126 1664 6.0 664 617 174.4
D 6 231 1635 6.36 623 566 168.0
D 7 3 1528 5.73 623 566 168.0
D 4 160 1524 5.7 623 566 168.0

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