ASTROSAT CZTI

Data Quality Report

Orbit 58151

Creation date: 2026-06-30T15:19:26.855065
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/AS1A14_042T02_9000006586_58151cztM0_level2.fits modeM0/AS1A14_042T02_9000006586_58151cztM0_level2_quad_clean.evt
Size (bytes)776,229,12076,783,680
Size740.3 MB 73.2 MB
Events in quadrant A2,995,354648,970
Events in quadrant B15,667,85393,766
Events in quadrant C3,521,390614,398
Events in quadrant D6,041,124511,993

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0136921
B0510798
C0150551
D0223401

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A65311231.883326%
B6531581989.098147%
C65311532.342673%
D653191413.994794%

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 7471 6531 3 3 0.04% 0.05%
B 7470 6530 5413 5413 72.46% 82.89%
C 7471 6531 47 47 0.63% 0.72%
D 7471 6531 796 796 10.65% 12.19%

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 3 14 39999 211.78 750 730 185.4
A 13 248 21774 113.49 750 730 185.4
A 2 143 16494 85.02 750 730 185.4
B 10 128 14001550 227492.86 282 274 61.5
B 2 249 323634 5253.96 282 274 61.5
B 4 201 57635 932.0 282 274 61.5
C 12 252 564132 2851.65 718 710 197.6
C 12 254 94622 475.32 718 710 197.6
C 6 223 36591 181.6 718 710 197.6
D 12 110 2607740 13510.25 683 655 193.0
D 8 240 159149 821.34 683 655 193.0
D 7 222 143280 739.1 683 655 193.0

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