ASTROSAT CZTI

Data Quality Report

Orbit 00842

Creation date: 2024-06-27T14:03:41.851155
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/AS1P01_165T02_9000000116_00842cztM0_level2.evt modeM0/AS1P01_165T02_9000000116_00842cztM0_level2_quad_clean.evt
Size (bytes)1,229,696,64081,973,440
Size1.1 GB 78.2 MB
Events in quadrant A11,654,989485,112
Events in quadrant B9,093,804506,710
Events in quadrant C8,374,288500,954
Events in quadrant D7,650,301495,919

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440
B01440
C01440
D01440

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0396980
B0320470
C0299170
D0278470

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A70816178.713459%
B7081470.663748%
C7081450.635503%
D7081510.720237%

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 7706 7083 2094 2094 27.17% 29.56%
B 7706 7083 525 525 6.81% 7.41%
C 7706 7083 297 297 3.85% 4.19%
D 7706 7083 237 237 3.08% 3.35%

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 15 127 3410618 6682.59 2118 2137 510.1
A 15 171 93569 179.26 2118 2137 510.1
A 15 233 30119 54.86 2118 2137 510.1
B 8 38 170172 312.64 2282 2291 537.0
B 5 249 60340 108.1 2282 2291 537.0
B 0 184 45100 79.72 2282 2291 537.0
C 8 208 138608 236.25 2071 2147 577.6
C 3 111 32096 51.85 2071 2147 577.6
C 10 34 22433 35.12 2071 2147 577.6
D 2 16 175212 283.16 1974 2045 611.5
D 1 4 39008 60.44 1974 2045 611.5
D 13 200 23611 35.26 1974 2045 611.5

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