ASTROSAT CZTI

Data Quality Report

Orbit 35535

Creation date: 2022-04-25T11:17:17.234410
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/AS1A11_097T09_9000005086_35535cztM0_level2.evt modeM0/AS1A11_097T09_9000005086_35535cztM0_level2_quad_clean.evt
Size (bytes)453,104,64073,200,960
Size432.1 MB 69.8 MB
Events in quadrant A2,804,883469,406
Events in quadrant B3,316,513471,466
Events in quadrant C3,638,350458,897
Events in quadrant D3,594,341436,999

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01120
B01120
C01120
D01120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0115973
B0131852
C0141732
D0142042

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0370
B0370
C0370
D0370

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5424100.184366%
B54241683.097345%
C54241743.207965%
D54241552.857670%

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 9100 5426 2 2 0.02% 0.04%
B 9100 5426 162 162 1.78% 2.99%
C 9100 5426 141 141 1.55% 2.60%
D 9100 5426 133 133 1.46% 2.45%

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 10 83 135422 1020.66 657 646 132.0
A 15 169 110508 831.99 657 646 132.0
A 9 143 19213 140.61 657 646 132.0
B 5 236 600458 4867.09 649 631 123.2
B 5 172 107026 863.31 649 631 123.2
B 5 255 41465 331.33 649 631 123.2
C 0 10 389821 2659.97 636 641 146.3
C 15 159 353780 2413.64 636 641 146.3
C 15 214 228415 1556.79 636 641 146.3
D 12 235 309775 2008.37 632 615 153.9
D 13 249 242306 1570.08 632 615 153.9
D 8 195 201998 1308.23 632 615 153.9

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