ASTROSAT CZTI

Data Quality Report

Orbit 57171

Creation date: 2026-04-22T23:50:19.134111
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_070T08_9000006568_57171cztM0_level2.fits modeM0/AS1A14_070T08_9000006568_57171cztM0_level2_quad_clean.evt
Size (bytes)372,064,32089,046,720
Size354.8 MB 84.9 MB
Events in quadrant A2,702,075585,922
Events in quadrant B3,206,339617,165
Events in quadrant C3,939,005540,437
Events in quadrant D3,446,777524,007

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01240
B01240
C01240
D01240

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0126961
B0139811
C0161021
D0143191

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6144490.797526%
B61451442.343369%
C61452413.921888%
D6145651.057771%

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 7089 6145 7 7 0.10% 0.11%
B 7090 6146 86 86 1.21% 1.40%
C 7090 6146 166 166 2.34% 2.70%
D 7090 6146 37 37 0.52% 0.60%

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 84566 519.0 646 629 161.7
A 13 248 57845 353.78 646 629 161.7
A 6 226 17506 104.35 646 629 161.7
B 2 249 312123 2303.36 633 611 135.2
B 10 16 226980 1673.8 633 611 135.2
B 0 213 34125 247.81 633 611 135.2
C 15 224 1101603 6546.48 611 603 168.2
C 15 198 160879 952.99 611 603 168.2
C 14 254 102845 607.92 611 603 168.2
D 12 33 327825 1855.16 618 588 176.4
D 5 113 166459 940.35 618 588 176.4
D 8 240 119357 673.32 618 588 176.4

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