ASTROSAT CZTI

Data Quality Report

Orbit 20210915_A09_131T01_9000004696_level2

Creation date: 2021-10-20T22:02:48.071383
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/AS1A09_131T01_9000004696cztM0_level2_bc.evt modeM0/AS1A09_131T01_9000004696cztM0_level2_quad_clean.evt
Size (bytes)10,551,003,8402,772,025,920
Size9.8 GB 2.6 GB
Events in quadrant A36,348,43918,601,399
Events in quadrant B94,874,84618,555,329
Events in quadrant C43,196,61718,407,317
Events in quadrant D133,514,15916,666,224

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A034900
B034900
C034900
D034900

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02370
B02380
C02380
D02380

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03558110
B05595610
C03840520
D06671910

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A17119920761.212624%
B17119981694.771640%
C17119957963.385534%
D1711992774616.206870%

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 205873 171206 9 9 0.00% 0.01%
B 205873 171202 201 201 0.10% 0.12%
C 205873 171186 251 251 0.12% 0.15%
D 205873 171195 14015 14015 6.81% 8.19%

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 6 475127 235.67 9113 8961 1978.1
A 13 6 381885 188.53 9113 8961 1978.1
A 13 254 312608 153.51 9113 8961 1978.1
B 6 159 46784860 26799.83 9120 8920 1745.4
B 4 80 6435294 3681.93 9120 8920 1745.4
B 5 172 2296396 1310.59 9120 8920 1745.4
C 3 233 3698903 1761.5 8870 8861 2094.8
C 0 10 3552207 1691.48 8870 8861 2094.8
C 4 175 636028 299.39 8870 8861 2094.8
D 1 52 46121068 23533.77 8513 8259 1959.4
D 8 195 38668991 19730.58 8513 8259 1959.4
D 12 233 4938472 2516.14 8513 8259 1959.4

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