ASTROSAT CZTI

Data Quality Report

Orbit 51609

Creation date: 2025-04-15T10:32:36.607628
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_037T05_9000006460_51609cztM0_level2.fits modeM0/AS1A13_037T05_9000006460_51609cztM0_level2_quad_clean.evt
Size (bytes)1,857,651,840299,995,200
Size1.7 GB 286.1 MB
Events in quadrant A19,060,3791,961,447
Events in quadrant B13,689,8292,199,308
Events in quadrant C17,262,9911,667,798
Events in quadrant D17,089,0371,771,098

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0330
B0330
C0330
D0330

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0718484
B0551524
C0667184
D0660014

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04400
B04400
C04400
D04400

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A2154014276.624884%
B215417063.277471%
C21540293713.635097%
D2154015737.302693%

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 24859 21540 1018 1018 4.10% 4.73%
B 24861 21544 384 384 1.54% 1.78%
C 24860 21542 2416 2416 9.72% 11.22%
D 24860 21543 1372 1372 5.52% 6.37%

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 4545879 8251.9 2280 2236 550.6
A 12 250 898540 1627.81 2280 2236 550.6
A 4 175 550752 996.18 2280 2236 550.6
B 10 44 938657 1923.09 2289 2211 486.9
B 5 172 667206 1365.64 2289 2211 486.9
B 4 174 656001 1342.63 2289 2211 486.9
C 13 3 7186893 12480.47 2088 2065 575.7
C 15 198 486083 840.77 2088 2065 575.7
C 0 209 397821 687.45 2088 2065 575.7
D 8 176 4375963 7159.8 2201 2125 610.9
D 12 6 637390 1039.9 2201 2125 610.9
D 0 18 610780 996.34 2201 2125 610.9

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