ASTROSAT CZTI

Data Quality Report

Orbit 06845

Creation date: 2024-06-27T15:12:18.506749
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/AS1A02_174T04_9000000938_06845cztM0_level2.evt modeM0/AS1A02_174T04_9000000938_06845cztM0_level2_quad_clean.evt
Size (bytes)829,981,440109,140,480
Size791.5 MB 104.1 MB
Events in quadrant A5,730,439639,981
Events in quadrant B5,463,032650,896
Events in quadrant C5,514,308646,713
Events in quadrant D7,695,961617,494

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0240
B0240
C0240
D0240

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0240383
B0229902
C0232872
D0303832

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02240
B02240
C02240
D02240

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A108151641.516412%
B108151151.063338%
C108151311.211281%
D108153973.670828%

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 13320 10817 7 7 0.05% 0.06%
B 13320 10817 0 0 0.00% 0.00%
C 13320 10817 9 9 0.07% 0.08%
D 13320 10816 222 222 1.67% 2.05%

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 8 15 423300 1525.4 1369 1341 276.6
A 15 239 25004 85.54 1369 1341 276.6
A 13 248 15850 52.45 1369 1341 276.6
B 0 219 38864 146.57 1373 1345 256.0
B 15 255 32418 121.39 1373 1345 256.0
B 12 111 25233 93.32 1373 1345 256.0
C 9 68 115262 371.56 1338 1345 306.6
C 10 22 106925 344.37 1338 1345 306.6
C 9 247 52510 166.88 1338 1345 306.6
D 8 195 1193540 3715.4 1325 1284 320.9
D 14 34 783630 2438.01 1325 1284 320.9
D 2 33 498795 1550.38 1325 1284 320.9

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