ASTROSAT CZTI

Data Quality Report

Orbit 20201212_A10_073T05_9000004068_level2

Creation date: 2025-12-18T17:07:58.315125
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_073T05_9000004068cztM0_level2.fits modeM0/AS1A10_073T05_9000004068cztM0_level2_quad_clean.evt
Size (bytes)1,055,960,640881,222,400
Size1007.0 MB 840.4 MB
Events in quadrant A6,628,8025,151,679
Events in quadrant B6,259,1624,996,862
Events in quadrant C6,346,4284,786,777
Events in quadrant D5,301,2444,312,089

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02233980
B02518800
C02345880
D03626670

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A022120
B022100
C022120
D022120

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01890
B01890
C01890
D01890

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1085449110.839291%
B10853235513.271846%
C10853323902.202095%
D1085251164110.726561%

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 144427 108602 0 0 0.00% 0.00%
B 144427 108534 0 0 0.00% 0.00%
C 144427 108580 0 0 0.00% 0.00%
D 144427 108365 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 5460 9.09 1730 1629 421.6
A 7 110 5236 8.55 1730 1629 421.6
A 9 19 5026 8.06 1730 1629 421.6
B 2 9 5028 10.69 1657 1586 322.1
B 2 8 4219 8.17 1657 1586 322.1
B 5 128 4098 7.8 1657 1586 322.1
C 12 241 4460 6.89 1676 1573 418.9
C 3 126 4307 6.53 1676 1573 418.9
C 12 250 4229 6.34 1676 1573 418.9
D 6 38 3794 5.97 1515 1383 403.5
D 10 189 3774 5.92 1515 1383 403.5
D 7 3 3774 5.92 1515 1383 403.5

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