ASTROSAT CZTI

Data Quality Report

Orbit 35618

Creation date: 2022-04-30T23:04:01.647259
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/AS1T05_028T01_9000005100_35618cztM0_level2.evt modeM0/AS1T05_028T01_9000005100_35618cztM0_level2_quad_clean.evt
Size (bytes)898,580,160112,259,520
Size857.0 MB 107.1 MB
Events in quadrant A5,031,893679,206
Events in quadrant B7,634,426671,098
Events in quadrant C6,710,282668,500
Events in quadrant D7,116,851642,849

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0310
B0310
C0310
D0310

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0218234
B0296223
C0264173
D0279943

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02180
B02180
C02180
D02180

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A10652100.093879%
B106528267.754412%
C106522782.609839%
D106524193.933534%

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 13575 10654 0 0 0.00% 0.00%
B 13575 10654 549 549 4.04% 5.15%
C 13575 10654 203 203 1.50% 1.91%
D 13574 10653 359 359 2.64% 3.37%

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 253075 1020.95 1224 1198 246.7
A 13 6 24186 93.18 1224 1198 246.7
A 15 169 14941 55.71 1224 1198 246.7
B 5 172 2544152 11247.68 1181 1148 226.1
B 0 190 220341 969.49 1181 1148 226.1
B 0 182 39054 167.66 1181 1148 226.1
C 0 10 808750 2940.91 1181 1189 274.6
C 9 187 760294 2764.45 1181 1189 274.6
C 15 214 433912 1575.85 1181 1189 274.6
D 1 52 975729 3377.13 1177 1144 288.6
D 7 80 673330 2329.26 1177 1144 288.6
D 8 195 266519 919.58 1177 1144 288.6

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