ASTROSAT CZTI

Data Quality Report

Orbit 31795

Creation date: 2024-06-27T20:32:50.437838
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/AS1T04_041T01_9000004642_31795cztM0_level2.evt modeM0/AS1T04_041T01_9000004642_31795cztM0_level2_quad_clean.evt
Size (bytes)1,452,240,000151,274,880
Size1.4 GB 144.3 MB
Events in quadrant A18,391,046739,258
Events in quadrant B10,051,0111,018,645
Events in quadrant C7,208,414967,445
Events in quadrant D7,463,585964,903

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0630153
B0397672
C0296022
D0302622

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02580
B02580
C02580
D02580

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A12879637249.475891%
B128792962.298315%
C128805364.161491%
D128801531.187888%

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 13969 12880 4242 4242 30.37% 32.93%
B 13969 12881 37 37 0.26% 0.29%
C 13970 12882 50 50 0.36% 0.39%
D 13970 12882 52 52 0.37% 0.40%

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 13 13975269 60568.73 1143 1119 230.7
A 13 254 16772 67.85 1143 1119 230.7
A 3 137 11815 46.36 1143 1119 230.7
B 6 159 3351956 11255.0 1545 1506 297.7
B 10 245 547365 1833.68 1545 1506 297.7
B 12 111 38586 124.56 1545 1506 297.7
C 0 10 714800 2031.09 1486 1497 351.2
C 14 238 313955 889.71 1486 1497 351.2
C 3 233 218618 618.24 1486 1497 351.2
D 8 195 1250647 3413.55 1518 1477 365.9
D 2 250 131062 354.11 1518 1477 365.9
D 12 227 123183 332.58 1518 1477 365.9

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