ASTROSAT CZTI

Data Quality Report

Orbit 20161115_C02_018T01_9000000798_level2

Creation date: 2017-09-19T02:31:37.678494
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/AS1C02_018T01_9000000798cztM0_level2.evt modeM0/AS1C02_018T01_9000000798cztM0_level2_quad_clean.evt
Size (bytes)3,514,582,080603,679,680
Size3.3 GB 575.7 MB
Events in quadrant A25,867,2453,672,742
Events in quadrant B30,024,2283,671,969
Events in quadrant C22,901,9323,847,665
Events in quadrant D24,271,0803,661,917

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0520
B0500
C0520
D0510

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01103380
B01221710
C01034560
D01083170

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010160
B010140
C010100
D010180

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A4997111752.351364%
B4988324054.821282%
C500176701.339545%
D5001210392.077501%

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 55945 50513 240 240 0.43% 0.48%
B 55945 50467 929 929 1.66% 1.84%
C 55945 50532 2 2 0.00% 0.00%
D 55945 50533 275 275 0.49% 0.54%

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 1806948 1492.4 5919 5793 1206.9
A 13 170 839822 691.06 5919 5793 1206.9
A 4 2 173068 138.6 5919 5793 1206.9
B 3 64 4675086 4137.18 5896 5752 1128.6
B 0 219 1240910 1094.39 5896 5752 1128.6
B 0 214 370439 323.12 5896 5752 1128.6
C 1 16 119547 84.6 5801 5832 1344.2
C 9 16 72279 49.43 5801 5832 1344.2
C 13 61 46045 29.92 5801 5832 1344.2
D 13 169 1096059 769.17 5785 5611 1417.7
D 5 97 320232 221.93 5785 5611 1417.7
D 2 33 292532 202.39 5785 5611 1417.7

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