ASTROSAT CZTI

Data Quality Report

Orbit 20211231_A11_065T11_9000004830_level2

Creation date: 2022-01-03T12:34:39.428962
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/AS1A11_065T11_9000004830cztM0_level2_bc.evt modeM0/AS1A11_065T11_9000004830cztM0_level2_quad_clean.evt
Size (bytes)1,566,930,240336,841,920
Size1.5 GB 321.2 MB
Events in quadrant A6,746,2002,107,514
Events in quadrant B10,617,3942,035,738
Events in quadrant C8,095,4852,101,063
Events in quadrant D19,994,2751,937,244

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06000
B05980
C06000
D06000

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0607060
B0802880
C0639830
D01099610

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0990
B0990
C0990
D0990

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A29408540.183624%
B2938821287.241051%
C294051480.503316%
D29352297810.145816%

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 45787 29493 2 2 0.00% 0.01%
B 45787 29468 92 92 0.20% 0.31%
C 45787 29494 14 14 0.03% 0.05%
D 45787 29435 243 243 0.53% 0.83%

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 15 169 748189 2226.08 1512 1487 335.4
A 13 6 82718 242.17 1512 1487 335.4
A 13 254 48740 140.87 1512 1487 335.4
B 5 172 3497257 12001.22 1466 1434 291.3
B 15 222 761986 2610.99 1466 1434 291.3
B 5 255 151882 516.49 1466 1434 291.3
C 15 214 1205394 3581.07 1474 1460 336.2
C 14 254 296528 877.67 1474 1460 336.2
C 0 10 266789 789.21 1474 1460 336.2
D 8 195 6466302 19358.19 1417 1375 334.0
D 2 250 2822760 8448.19 1417 1375 334.0
D 12 235 2386947 7143.21 1417 1375 334.0

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