ASTROSAT CZTI

Data Quality Report

Orbit 51788

Creation date: 2025-04-25T16:18:25.972450
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/AS1A13_090T01_9000006464_51788cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51788cztM0_level2_quad_clean.evt
Size (bytes)899,251,20073,794,240
Size857.6 MB 70.4 MB
Events in quadrant A8,688,168490,088
Events in quadrant B12,066,336273,648
Events in quadrant C3,982,232577,722
Events in quadrant D8,047,997438,973

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B070
C070
D070

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0303481
B0403081
C0163271
D0283491

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6503139421.436260%
B6504411763.299508%
C65042734.197417%
D6504161524.830873%

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 7163 6503 1155 1155 16.12% 17.76%
B 7164 6504 3567 3567 49.79% 54.84%
C 7164 6504 145 145 2.02% 2.23%
D 7164 6504 1395 1395 19.47% 21.45%

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 12 3 1904919 11872.77 649 631 160.4
A 4 249 1719191 10714.8 649 631 160.4
A 15 174 764780 4764.28 649 631 160.4
B 10 128 9123941 94350.33 445 429 96.7
B 4 206 305444 3154.3 445 429 96.7
B 4 81 244575 2524.82 445 429 96.7
C 15 218 178465 948.8 690 682 187.4
C 13 3 167293 889.17 690 682 187.4
C 14 245 164696 875.31 690 682 187.4
D 11 129 4446614 25667.52 619 597 173.2
D 8 176 403918 2328.43 619 597 173.2
D 3 12 310237 1787.6 619 597 173.2

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