ASTROSAT CZTI

Data Quality Report

Orbit 50509

Creation date: 2025-01-29T12:30:16.302598
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_50509cztM0_level2.fits modeM0/AS1T05_239T01_9000006444_50509cztM0_level2_quad_clean.evt
Size (bytes)582,289,92077,368,320
Size555.3 MB 73.8 MB
Events in quadrant A5,766,411467,937
Events in quadrant B3,072,509590,804
Events in quadrant C7,314,284424,232
Events in quadrant D4,958,249459,772

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0211121
B0132151
C0257191
D0187801

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01180
B01180
C01180
D01180

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A571297917.139356%
B57121592.783613%
C5712140224.544818%
D571362010.852442%

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 6747 5712 870 870 12.89% 15.23%
B 6747 5712 55 55 0.82% 0.96%
C 6747 5712 1300 1300 19.27% 22.76%
D 6748 5713 553 553 8.20% 9.68%

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 2539352 17917.15 572 557 141.7
A 12 250 210191 1479.46 572 557 141.7
A 10 251 165242 1162.24 572 557 141.7
B 1 238 218113 1657.34 613 592 131.2
B 4 170 126753 961.25 613 592 131.2
B 6 203 70780 534.78 613 592 131.2
C 15 235 1436773 9320.77 548 543 154.1
C 0 208 914324 5930.21 548 543 154.1
C 12 247 535129 3469.33 548 543 154.1
D 7 77 804632 5118.56 567 548 157.1
D 6 42 639322 4066.25 567 548 157.1
D 7 96 242926 1542.9 567 548 157.1

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