ASTROSAT CZTI

Data Quality Report

Orbit 20190502_A05_221T01_9000002888_level2

Creation date: 2025-11-30T00:11:38.565200
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/AS1A05_221T01_9000002888cztM0_level2.fits modeM0/AS1A05_221T01_9000002888cztM0_level2_quad_clean.evt
Size (bytes)1,428,336,0001,279,768,320
Size1.3 GB 1.2 GB
Events in quadrant A8,907,7207,589,821
Events in quadrant B8,506,7287,594,386
Events in quadrant C8,666,2587,301,842
Events in quadrant D7,319,3226,418,474

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A029220
B029280
C029240
D029280

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02340
B02330
C02340
D02340

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03026900
B03097750
C03048340
D04345630

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A14392613880.964384%
B14386119861.380499%
C14393521751.511099%
D143555115228.026192%

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 166811 144274 0 0 0.00% 0.00%
B 166811 144230 0 0 0.00% 0.00%
C 166811 144313 0 0 0.00% 0.00%
D 166811 143706 0 0 0.00% 0.00%

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 29 8427 11.28 2320 2180 553.8
A 7 110 6980 8.67 2320 2180 553.8
A 0 30 6601 7.98 2320 2180 553.8
B 2 9 6843 10.88 2245 2144 431.9
B 2 8 5816 8.5 2245 2144 431.9
B 5 225 5620 8.05 2245 2144 431.9
C 1 81 6595 7.62 2284 2139 585.0
C 1 80 6510 7.47 2284 2139 585.0
C 3 126 5947 6.51 2284 2139 585.0
D 3 14 5308 6.2 2090 1907 548.8
D 10 189 5159 5.93 2090 1907 548.8
D 7 3 5054 5.73 2090 1907 548.8

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