ASTROSAT CZTI

Data Quality Report

Orbit 20180427_A04_225T01_9000002062_level2

Creation date: 2025-11-22T02:23:48.444945
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_225T01_9000002062cztM0_level2.fits modeM0/AS1A04_225T01_9000002062cztM0_level2_quad_clean.evt
Size (bytes)1,004,938,5601,081,465,920
Size958.4 MB 1.0 GB
Events in quadrant A6,118,2246,648,717
Events in quadrant B5,972,5166,856,631
Events in quadrant C6,063,9386,389,253
Events in quadrant D5,111,7665,693,480

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A021300
B021300
C021300
D021300

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02277490
B02265610
C02177440
D02796930

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01810
B01810
C01810
D01810

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A10455421692.074526%
B10455418451.764638%
C1045549480.906708%
D10455438163.649789%

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 122813 104544 0 0 0.00% 0.00%
B 122814 104550 0 0 0.00% 0.00%
C 122813 104552 0 0 0.00% 0.00%
D 122813 104488 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 5751 10.78 1594 1495 394.7
A 7 110 5113 9.17 1594 1495 394.7
A 9 19 4544 7.73 1594 1495 394.7
B 2 9 5135 11.81 1577 1506 307.4
B 3 17 3991 8.08 1577 1506 307.4
B 14 254 3965 8.0 1577 1506 307.4
C 1 80 4606 7.46 1603 1495 417.1
C 1 81 4596 7.43 1603 1495 417.1
C 12 241 4329 6.79 1603 1495 417.1
D 6 231 3700 6.08 1459 1326 390.2
D 6 67 3684 6.04 1459 1326 390.2
D 3 14 3678 6.03 1459 1326 390.2

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