ASTROSAT CZTI

Data Quality Report

Orbit 20201128_A10_021T02_9000004036_level2

Creation date: 2021-01-07T05:20:04.140580
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev: 1121 $

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/AS1A10_021T02_9000004036cztM0_level2_bc.evt modeM0/AS1A10_021T02_9000004036cztM0_level2_quad_clean.evt
Size (bytes)1,171,419,840342,443,520
Size1.1 GB 326.6 MB
Events in quadrant A5,338,5402,236,316
Events in quadrant B7,489,7412,236,393
Events in quadrant C5,217,4702,143,659
Events in quadrant D15,689,9252,000,074

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0526640
B0603390
C0529300
D0879610

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0190
B0190
C0190
D0190

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05180
B05180
C05180
D05180

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A255222090.818901%
B255224411.727921%
C255223231.265575%
D2552223709.286106%

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 27347 25522 97 97 0.35% 0.38%
B 27347 25520 1 1 0.00% 0.00%
C 27347 25523 6 6 0.02% 0.02%
D 27347 25518 710 710 2.60% 2.78%

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 6 16 258075 891.02 1308 1285 288.2
A 13 254 40734 136.88 1308 1285 288.2
A 8 192 18430 59.49 1308 1285 288.2
B 10 245 2089468 8288.75 1314 1280 251.9
B 5 172 125392 492.64 1314 1280 251.9
B 0 230 68382 266.35 1314 1280 251.9
C 2 16 181677 596.65 1264 1257 302.4
C 15 208 68836 223.49 1264 1257 302.4
C 10 22 58119 188.04 1264 1257 302.4
D 1 52 5549745 18940.67 1244 1203 292.9
D 7 80 2909624 9928.27 1244 1203 292.9
D 8 195 1136450 3875.31 1244 1203 292.9

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