ASTROSAT CZTI

Data Quality Report

Orbit 50498

Creation date: 2025-01-28T19:01:40.471521
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/AS1T05_239T01_9000006444_50498cztM0_level2.fits modeM0/AS1T05_239T01_9000006444_50498cztM0_level2_quad_clean.evt
Size (bytes)1,193,428,80080,447,040
Size1.1 GB 76.7 MB
Events in quadrant A5,630,881684,714
Events in quadrant B7,373,224625,975
Events in quadrant C13,376,699426,547
Events in quadrant D17,210,495169,363

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0218720
B0271880
C0450720
D0562410

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01520
B01520
C01520
D01520

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A76003184.184211%
B7600149319.644737%
C7600326542.960526%
D7600584376.881579%

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 7600 7600 224 224 2.95% 2.95%
B 7600 7600 1261 1261 16.59% 16.59%
C 7599 7599 3050 3050 40.14% 40.14%
D 7599 7599 5867 5867 77.21% 77.21%

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 10 253 1088011 5498.07 795 775 197.7
A 12 250 532365 2688.21 795 775 197.7
A 4 3 216014 1088.45 795 775 197.7
B 4 206 3614811 23272.46 722 696 155.3
B 7 0 368740 2369.95 722 696 155.3
B 4 170 159768 1024.32 722 696 155.3
C 15 235 2904745 15866.24 658 654 183.0
C 15 196 2014090 11000.23 658 654 183.0
C 15 236 1544966 8437.21 658 654 183.0
D 7 61 11198066 79696.65 500 482 140.5
D 11 161 885681 6300.23 500 482 140.5
D 6 42 579501 4121.06 500 482 140.5

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