ASTROSAT CZTI

Data Quality Report

Orbit 35518

Creation date: 2022-04-24T00:57:12.952276
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_097T07_9000005084_35518cztM0_level2.evt modeM0/AS1A11_097T07_9000005084_35518cztM0_level2_quad_clean.evt
Size (bytes)402,419,52074,088,000
Size383.8 MB 70.7 MB
Events in quadrant A2,758,281473,870
Events in quadrant B2,738,299477,220
Events in quadrant C3,058,952468,161
Events in quadrant D3,264,906446,526

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01100
B01100
C01100
D01100

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0117033
B0116722
C0123772
D0132772

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0340
B0340
C0340
D0340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5401260.481392%
B5401240.444362%
C5401921.703388%
D54011733.203111%

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 8715 5403 17 17 0.20% 0.31%
B 8715 5403 11 11 0.13% 0.20%
C 8715 5403 53 53 0.61% 0.98%
D 8715 5403 147 147 1.69% 2.72%

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 15 169 148797 1178.86 623 609 125.7
A 10 83 137855 1091.82 623 609 125.7
A 9 143 47147 370.22 623 609 125.7
B 5 236 105546 879.35 618 602 119.3
B 5 172 102766 856.06 618 602 119.3
B 5 200 36082 297.3 618 602 119.3
C 0 10 280728 1969.12 608 611 142.3
C 15 214 224407 1573.21 608 611 142.3
C 15 159 80401 560.9 608 611 142.3
D 10 118 471638 3177.42 604 587 148.2
D 8 195 179208 1204.87 604 587 148.2
D 13 249 114584 768.95 604 587 148.2

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