ASTROSAT CZTI

Data Quality Report

Orbit 20210422_C05_019T01_9000004332_level2

Creation date: 2021-04-26T10:58:04.760183
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/AS1C05_019T01_9000004332cztM0_level2_bc.evt modeM0/AS1C05_019T01_9000004332cztM0_level2_quad_clean.evt
Size (bytes)3,774,556,8001,640,410,560
Size3.5 GB 1.5 GB
Events in quadrant A18,218,63911,255,057
Events in quadrant B42,143,27711,234,491
Events in quadrant C18,355,23510,762,293
Events in quadrant D29,789,91610,586,614

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01230
B01230
C01230
D01230

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01766400
B02593820
C01800010
D02130100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A017380
B017380
C017380
D017380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A854008881.039813%
B8540018932.216628%
C8540023232.720141%
D8540025522.988290%

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 97510 85401 6 6 0.01% 0.01%
B 97510 85401 13 13 0.01% 0.02%
C 97510 85399 16 16 0.02% 0.02%
D 97510 85402 363 363 0.37% 0.43%

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 13 410069 414.01 4520 4460 979.7
A 8 192 172038 171.05 4520 4460 979.7
A 14 238 163209 162.04 4520 4460 979.7
B 6 159 23641932 27471.19 4524 4427 860.4
B 0 190 492377 567.09 4524 4427 860.4
B 4 171 364557 418.54 4524 4427 860.4
C 3 233 1297770 1280.52 4292 4290 1010.1
C 14 254 197130 190.91 4292 4290 1010.1
C 2 114 160557 154.7 4292 4290 1010.1
D 1 52 5601874 5517.29 4335 4229 1014.6
D 8 195 2498961 2458.92 4335 4229 1014.6
D 13 104 1274556 1252.09 4335 4229 1014.6

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