ASTROSAT CZTI

Data Quality Report

Orbit 51536

Creation date: 2025-04-08T17:16:50.431239
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_9000006458_51536cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51536cztM0_level2_quad_clean.evt
Size (bytes)2,574,158,400246,528,000
Size2.4 GB 235.1 MB
Events in quadrant A27,084,4411,503,774
Events in quadrant B12,235,1591,986,022
Events in quadrant C18,889,4421,658,458
Events in quadrant D35,520,607918,539

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0947504
B0498474
C0702594
D01195564

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0300
B0300
C0300
D0300

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04140
B04140
C04140
D04140

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A20267434521.438792%
B202675892.906202%
C2026717148.457098%
D20267965247.624217%

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 23217 20269 3133 3133 13.49% 15.46%
B 23217 20270 182 182 0.78% 0.90%
C 23217 20271 1285 1285 5.53% 6.34%
D 23217 20269 8731 8731 37.61% 43.08%

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 7536840 15092.98 2039 1988 499.2
A 7 64 5017414 10046.35 2039 1988 499.2
A 12 250 2988954 5983.16 2039 1988 499.2
B 15 52 665620 1436.09 2178 2099 462.0
B 0 171 452690 975.23 2178 2099 462.0
B 10 247 451507 972.67 2178 2099 462.0
C 3 233 7255540 12384.6 2115 2093 585.7
C 13 3 882075 1502.49 2115 2093 585.7
C 3 242 580652 987.84 2115 2093 585.7
D 8 176 26926569 59390.57 1621 1562 453.4
D 6 42 482781 1061.46 1621 1562 453.4
D 2 249 313715 688.54 1621 1562 453.4

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